[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17850305#comment-17850305
]
Michael Semb Wever commented on CASSANDRA-12937:
bq. I know Mick has approved on the PR…
I
[removed|https://issues.apache.org/jira/browse/CASSANDRA-12937?focusedCommentId=17831674=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17831674]
that approval once the concerns around bringing keyspace into the serialiser
was raised.
I will review again…
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8.5h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17850196#comment-17850196
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~mck] [~jlewandowski] [~claude] is (1) fine with you?
I am looking for final approval. I know Mick has approved on the PR but that
was a long time ago without CASSANDRA-19592 and cassandra.yaml configuration
embedding into "sstable" section.
(1) https://github.com/apache/cassandra/pull/3330
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17850195#comment-17850195
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[CASSANDRA-12937-squashed|https://github.com/instaclustr/cassandra/tree/CASSANDRA-12937-squashed]
{noformat}
java17_pre-commit_tests
✓ j17_build 4m 3s
✓ j17_cqlsh_dtests_py311 7m 13s
✓ j17_cqlsh_dtests_py311_vnode 7m 37s
✓ j17_cqlsh_dtests_py386m 52s
✓ j17_cqlsh_dtests_py38_vnode 7m 21s
✓ j17_cqlshlib_cython_tests7m 56s
✓ j17_cqlshlib_tests 6m 46s
✓ j17_jvm_dtests_latest_vnode 27m 54s
✓ j17_unit_tests 14m 44s
✓ j17_utests_latest15m 3s
✕ j17_dtests 37m 42s
scrub_test.TestScrub test_standalone_scrub_essential_files_only
topology_test.TestTopology test_movement
✕ j17_dtests_latest 35m 24s
offline_tools_test.TestOfflineTools test_sstableverify
scrub_test.TestScrub test_standalone_scrub_essential_files_only
✕ j17_dtests_vnode36m 15s
scrub_test.TestScrub test_standalone_scrub_essential_files_only
✕ j17_jvm_dtests 29m 10s
org.apache.cassandra.distributed.test.NativeTransportEncryptionOptionsTest
testOptionalMtlsModeDoNotAllowNonSSLConnections
org.apache.cassandra.distributed.test.NativeTransportEncryptionOptionsTest
testEndpointVerificationEnabledIpNotInSAN
✕ j17_utests_oa17m 8s
org.apache.cassandra.db.compaction.CompactionStrategyManagerTest
testAutomaticUpgradeConcurrency
java17_separate_tests
java11_pre-commit_tests
java11_separate_tests
{noformat}
[java17_pre-commit_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4358/workflows/9fbc3590-1168-41f8-a7c8-a3fbb3dfc0b0]
[java17_separate_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4358/workflows/d2e65942-b99e-4927-bd65-85800e9d94e9]
[java11_pre-commit_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4358/workflows/df51197e-c92e-454f-9c75-2f5eaee43bb8]
[java11_separate_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4358/workflows/6df36e29-d2cd-4838-b3b8-69e9113b295f]
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17849218#comment-17849218
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Seems reasonably clean ...
What I have not done is that the idea Jacek had with "if some config parameter
is not in cql statement just merge the values from cassandra.yaml" because it
is quite tricky to get that right. We would need to know what values were
specfied and then diffing what is not there and then validating that such
combination makes sense (and if it does not, should we fail otherwise valid CQL
statement just because we happened to merge values from cassandra.yaml and that
combination was not right? I do not think so).
Let's just go with a simple case of "if compression is not specified just take
the defaults from cassandra.yaml" rather then trying to merge the configs ...
Too much of a hassle, might come as an improvement if somebody is really after
that.
I will try to come up with more tests and I think that sometimes next week this
should be all completed and ready for review again.
[CASSANDRA-12937-squashed|https://github.com/instaclustr/cassandra/tree/CASSANDRA-12937-squashed]
{noformat}
java17_pre-commit_tests
✓ j17_build 4m 7s
✓ j17_cqlsh_dtests_py311 7m 11s
✓ j17_cqlsh_dtests_py311_vnode 7m 18s
✓ j17_cqlsh_dtests_py386m 58s
✓ j17_cqlsh_dtests_py38_vnode 7m 1s
✓ j17_cqlshlib_cython_tests7m 26s
✓ j17_cqlshlib_tests 6m 50s
✓ j17_unit_tests 17m 36s
✓ j17_utests_oa 15m 39s
✕ j17_dtests 37m 48s
scrub_test.TestScrub test_standalone_scrub_essential_files_only
topology_test.TestTopology test_movement
✕ j17_dtests_latest 35m 36s
offline_tools_test.TestOfflineTools test_sstableverify
scrub_test.TestScrub test_standalone_scrub_essential_files_only
configuration_test.TestConfiguration test_change_durable_writes
✕ j17_dtests_vnode35m 11s
scrub_test.TestScrub test_standalone_scrub_essential_files_only
✕ j17_jvm_dtests 28m 15s
✕ j17_jvm_dtests_latest_vnode 27m 59s
org.apache.cassandra.fuzz.harry.integration.model.ConcurrentQuiescentCheckerIntegrationTest
testConcurrentReadWriteWorkload
✕ j17_utests_latest 14m 34s
org.apache.cassandra.tcm.DiscoverySimulationTest discoveryTest
java17_separate_tests
java11_pre-commit_tests
java11_separate_tests
{noformat}
[java17_pre-commit_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4350/workflows/a68e4fb0-bd7a-4758-841c-6b4b0fe22865]
[java17_separate_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4350/workflows/fa57a86d-d120-4304-bbdf-a6cf8fefc4d2]
[java11_pre-commit_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4350/workflows/91afc77c-54fe-4369-9cb9-ababa3568e16]
[java11_separate_tests|https://app.circleci.com/pipelines/github/instaclustr/cassandra/4350/workflows/71add260-9c68-4d87-9d5a-99863a01bb3f]
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
>
[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17849018#comment-17849018
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I consolidated the links for PR's as it was getting confusing.
Claude's PR: [https://github.com/apache/cassandra/pull/3168]
mine which is same as his but squashed:
[https://github.com/apache/cassandra/pull/3330]
I rebased mine against current trunk where CASSANDRA-19592 was merged and I see
that the problematic test (SSTableCompressionTest#configChangeIsolation) passes
now which is indeed good news.
I will run a CI to see if something else is broken.
btw [~jlewandowski] mentioned me privately that it would be nice if we had the
configuration like this:
{code}
sstable:
selected_format: big
default_compression: lz4 check this
format:
big:
option1: abc
option2: 123
bti:
option3: xyz
option4: 999
compression: check this
lz4:
enabled: true
chunk_length: 16KiB
max_compressed_length: 16KiB
snappy:
enabled: true
chunk_length: 16KiB
max_compressed_length: 16KiB
deflate:
enabled: false
chunk_length: 16KiB
max_compressed_length: 16KiB
{code}
instead of what we have now:
{code}
sstable_compression:
- class_name: lz4
parameters:
- enabled: "true"
chunk_length: 16KiB
max_compressed_length: 16KiB
{code}
The reasoning behind that is that we are just enriching existing configuration
section, we are not inventing anything new. Plus it would be cool to have
predefined compression options so if we just use lz4 in CQL then all parameters
will be automatically taken into consideration as well. If we provide some
parameters on CQL, these will be merged into what is in cassandra.yaml.
[~claude] I can take a look into this.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17841183#comment-17841183
]
Alex Petrov commented on CASSANDRA-12937:
-
Yes, tried this locally, wrote a bunch of tests, patch coming up as soon as
python dtests wrap up!
And yes, it seemed like we should just replicate what 5.0 does right now, and
it implicitly does this via schema mutations. Schema mutations are created
using coordinating node's defaults. Since we are not using schema mutations in
5.1 anymore, I thought expanding CQL is the second best option.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17841180#comment-17841180
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Interesting, do you have the code related to schema expansion you mentioned
nearby so we dont need to invent the wheel? I am assuming you've tried this
locally, correct?
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17841157#comment-17841157
]
Alex Petrov commented on CASSANDRA-12937:
-
Looks like it is possible to solve this problem for now in a much simpler way.
We can simply fully expand the {{CREATE TABLE}} on the coordinator and achieve
persistence of arguments. I think we will need a CEP for a more sophisticated
approach, which we probably should leave for later.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837237#comment-17837237
]
Alex Petrov commented on CASSANDRA-12937:
-
bq. Yes, I think this is the most ideal solution. If somebody wants to
experiment with a new compressor and similar, there would need to be some knob
to override it, like some JMX method or similar, and all risks attached to that
(divergence of the configuration caused by operator's negligence) would be on
him.
Some things are actually quite useful for gradual rollout. For example,
compression. You probably do not want to rewrite your sstables across the
entire cluster. Similar arguments may be made for canary deployments of
memtable settings and other things.
I agree that it is fine if these parameters are completely transient (i.e. if
you have set it to something that diverges from the clusterwide value, it will
get reverted back after the node bounce). In such case, probably they will not
go through TCM and will be purely node-local.
Examples of things that are now configuable via yaml but will be configurable
via TCM if we go ahead with this proposal: partitioner, memtable configuration,
default compaction strategy, compression. As Sam has mentioned, "which specific
value makes it into schema just depends on which instance acts as the
coordinator for a given DCL statement".
bq. but I remain unconvinced that just picking the defaults from whatever node
happens to be coordinating is the right way to go.
I have talked with Sam shortly just to make sure I understand it correctly
before trying to describe it. Since this was first worded in a way that
suggested a problem but not directly proposed a solution (possibly described
elsewhere), I will attempt to do this. Sam has already described a part of the
solution as:
bq. That should probably be in a parallel local datastructure though, not in
the node's local log table as we don't want to ship those local defaults to
peers when providing log catchup (because they should use their own defaults).
The part that was missing for me was where would the values be coming from, and
what would be the precedence. When executing a {CREATE} statement on some node
_without_ specifying, say, compression, the statement will be created and
executed without the value for compression set at all. Every node will pick the
value from its ephemeral parallel structure Sam described (which is also
settable via JMX and alike like Stefan mentioned). If no value is present in
this table, it will be picked from yaml (alternatively, we could just populate
this structure from yaml, too, but I consider these things roughly equivalent).
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837230#comment-17837230
]
Jacek Lewandowski commented on CASSANDRA-12937:
---
[~samt] let's leave aside the discussion about whether CQL is good or not as
serialization format - I didn't mean that actually. I meant that we store the
raw CQL passed by the user which is known before processing the transformation.
The resolved table settings are available after the transformation and require
rebuilding the statement as we do in "describe".
Ok, it looks like the table should simply not store the resolved default but
just the "default marker" to use whatever default is set on the node. That is,
if we not provide any compression/compaction/memtable configuration explicitly,
we will apply the node specific defaults from the yaml.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837220#comment-17837220
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
1/2. I am not sure, you could easily test this, just set default compactions /
compressions on each node and see if schemas are in an agreement.
3/4. I think that, ideally, out of the box, it should be same everywhere and a
user would need to make a conscious choice if he wanted to override that.
Currently, nothing prevents the configuration to be diverged. It is not about
whether we should enable it or not, it should be rather about being sure that
we do not diverge when we do not know about that.
5. I am not sure, it would be interesting to go over yaml and indentify these
which _have to_ to be same everywhere, these would be candidates to put into
TCM I guess.
6. currently we do not, I think that TCM would achieve that.
7. I think this all leads to some kind of an extension of nodetool which would
talk to TCM and it would set defaults there which are not settable otherwise.
E.g. default compression, so you would use a nodetool's subcommand to talk to
TCM where you would say "commit this default compression for me", and then all
nodes would apply these defaults from the log, eventually. Any other config
change similar to this would be like that.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837214#comment-17837214
]
Claude Warren commented on CASSANDRA-12937:
---
I think a few questions are in order:
# Is compression selection really part of the schema? My impression is that
the schema defines what goes into the tables, not how the tables are written
(e.g. different SSTable formats).
# is compaction selection part of the schema?
# do we allow nodes to have different compaction?
# If we allow different compaction on different nodes why would we not allow
different compression?
# If we have settings that must be the same across all the nodes do we have a
way to identify them in the configuration?
# if we can identify them, how do we guarantee that they are not different
across the nodes?
# If we can identify them, how do we set them?
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837210#comment-17837210
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
{quote}It seems like if we actually want these to be cluster wide values and
not configurable on a per-node basis the defaults themselves should be in
TCM{quote}
Yes, I think this is the most ideal solution. If somebody wants to experiment
with a new compressor and similar, there would need to be some knob to override
it, like some JMX method or similar, and all risks attached to that (divergence
of the configuration caused by operator's negligence) would be on him.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837201#comment-17837201
]
Sam Tunnicliffe commented on CASSANDRA-12937:
-
So you're suggesting that we could have different default values in yaml across
the cluster, but that all nodes actually apply the same value regardless of
their own configured default? Which specific value makes it into schema just
depends on which instance acts as the coordinator for a given DCL statement? It
seems like if we actually want these to be cluster wide values and not
configurable on a per-node basis the defaults themselves should be in TCM,
independently of the schema transformations. In the past, we've used per-node
configuration like this to experiment with new compression algorithms on a
per-node basis and I can imagine potentially wanting to do the same with things
like compaction, so I'm not entirely convinced that this assumption is correct.
As far as the serialization format, schema transformations have to be
round-trippable via CQL for the purposes of recreating a schema from a
snapshot. So I don't think that using the CQL itself as the format is
inherently flawed and it does have a couple of big positives, namely that it's
great for visibility (for operators or when debugging) and that it doesn't
invent a new format, that we have version and manage as new
flags/features/defaults are added.
We should just need fully resolve and expand a DCL statement before serializing
it in {{SchemaAlteringStatement}} which would be entirely possible, but I
remain unconvinced that just picking the defaults from whatever node happens to
be coordinating is the right way to go.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837191#comment-17837191
]
Jacek Lewandowski commented on CASSANDRA-12937:
---
{quote}Ideally we should store the value that is actually resolved during
initial execution on each node so that it can be re-used if/when the
transformation is reapplied.
{quote}
So, if nodes had configurations out-of-sync, they would end up with local
schemas with different compression, compaction, etc. settings each?
I didn't mean storing defaults as defaults, just materializing all the settings
when the table is created. Currently it is not easy because the schema
transformation is stored as a raw CQL
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837188#comment-17837188
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I don't think that nodes should diverge in any way when it comes to schemas.
All the schema should be taken from TCM, irrelevant how local node is
configured. I just do not see why would one want one node to compress with
Deflate and another one to compress with lz4 ... Basically, it should ignore
what is configured locally if it is different in TCM.
This problem will probably be visible e.g. in Guardrails in TCM. What
guardrails it should take into account when we join a new node and local
guardrails configuration is different from the one in TCM? I would say that TCM
should win here.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837179#comment-17837179
]
Sam Tunnicliffe commented on CASSANDRA-12937:
-
The problem with that is that the defaults may be different on every instance,
so what exactly should be stored in the TCM log? Ideally we should store the
value that is actually resolved during initial execution on each node to be
persisted locally so that it can be re-used if/when the transformation is
reapplied. That should probably be in a parallel local datastructure though,
not in the node's local log table as we don't want to ship those local defaults
to peers when providing log catchup (because they should use their own
defaults).
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17837176#comment-17837176
]
Jacek Lewandowski commented on CASSANDRA-12937:
---
The problem with the failing test is probably that the default configuration
for compression parameters (and other defaults for table / keyspace
creation/alteration) should be part of the schema transformation data and
stored in TCM log.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17834286#comment-17834286
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
The reason the above is happening has something to do with how TCM works. When
we shut down a node and we restart it, TCM will basically reconstruct all
schema from scratch by replying its log, one schema change after another, so by
definition when we apply all transformations, we will get the final schema.
With the current state of the patch I opened, when we start a node for the
first time, the patch will resolve the default compressor from cassandra.yaml
and it will use that one. However, upon restart, with changed default, TCM will
replay it all over again, but now with the changed default so it will not match
anymore.
Honestly, I am not sure how to fix this. This problem also occurs in the branch
of Claude without my commits too and the test fails there as well. I think that
this patch was so long time around that TCM was introduced and it does not play
together anymore.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17834267#comment-17834267
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I added changes to Claude's PR in my PR here
https://github.com/Claudenw/cassandra/pull/12/files
I run CI and it looks good but there is one test which fails:
org.apache.cassandra.distributed.test.SSTableCompressionTest
configChangeIsolation
What that test does is that it tries to verify the following scenario:
1) create a table with some default compressor (e.g. LZ4)
2) restart a node but change the default compressor to e.g. Deflate
3) check that the table created in 1) with LZ4 will still continue to use LZ4
As the test shows, it will start to use Deflate instead. I am trying to fix
this.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17834004#comment-17834004
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I want to write this down explicitly ... It is not possible to alter system
schema already, on CQL level. So preventing a user to change a compressor for
system tables, even replicated ones, to some which is not the default is not
possible already. What we want to prevent is to not be even able configure it
via cassandra.yaml to something else. These are two different problems.
I write this because as I go through the patch and polishing it, it broke a
test which is changing compressors for each distributed tables - and
system_auth is distributed, but it is system one. So changing the compressor on
that failed because we are preventing that on code level while constructing
TableMetadata, not just when we execute a respective CQL command.
This might be a little bit surprising to see at first but I think it makes
sense. We just prevent that from happening one "level" deeper, not only CQL but
it is not possible to configure it programmatically too.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17831674#comment-17831674
]
Michael Semb Wever commented on CASSANDRA-12937:
+1 to https://github.com/apache/cassandra/pull/3168
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 7h 40m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17823463#comment-17823463
]
Claude Warren commented on CASSANDRA-12937:
---
[~smiklosovic] , we have finished 16565, Can we look at moving this forward?
The pull request I placed against your branch changes the exclusion code so
that it is all in one place. calling for the default compression will properly
exclude system keyspaces, and gives us a single point in which to fix any other
issues that arise.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17804675#comment-17804675
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
It would be great to finish 16565 first. Also, reading my last comment, it was
quite a while ago and I am afraid I lost the context of what I had "in my head".
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17804659#comment-17804659
]
Claude Warren commented on CASSANDRA-12937:
---
Where are we with this change? I would like to see it move forward.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17747123#comment-17747123
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I think we need to park this ticket for a while and return to it after 5.0 is
out. There is clearly more work on this to be done.
I was thinking about how to make it more robust, all in my head yet, hard to
communicate, but we should spend little bit more time on this (how to exclude
system keyspaces and all the related code and logic around that).
Claude also came with an idea to make it able to specify compression _per
keyspace_ and that would shuffle quite a lot of stuff - configuration wise.
Also, if we say what should be the default compression ... why _just
compression?_ Why we could not support e.g. compaction as well? One might say
that he wants to compact all tables in this keyspace by
UnifiedCompactionStrategy and tables in another keyspace by TWCS, for example.
So we see that this might be done a little bit more robustly to not just wire
it for compression but to allow the code to be "plastic" enough to make a room
for similar improvements in the future.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 7h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17746652#comment-17746652
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I fixed it all https://github.com/apache/cassandra/pull/2282/files
[https://app.circleci.com/pipelines/github/instaclustr/cassandra/2782/workflows/e2592244-db90-4520-82e7-9322e87e923c]
This patch is getting bigger each day! I think we are trully done and we should
have a serious review of this stuff by some committer. The problem is who is
going to do that ...
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17744193#comment-17744193
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
We need to exclude all system tables from this patch. It is not desirable to
compress some system table by a default from sstable_compression. It just has
to be as it was before - effectively every time on LZ4.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
--
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17744174#comment-17744174
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
OK.
We introduced this:
{code}
case fast:
if
(!compressor.recommendedUses().contains(ICompressor.Uses.FAST_COMPRESSION))
{
// it may happen that default compressor in
cassandra.yaml will not be fast,
// if that is the case, we need to fall back to a
default compressor which is fast
compressionParams = CompressionParams.defaultParams();
if
(!compressionParams.getSstableCompressor().recommendedUses().contains(ICompressor.Uses.FAST_COMPRESSION))
{
compressionParams =
CompressionParams.defaultFastCompression();
}
break;
}
{code}
This has to be reverted how it was:
{code}
case fast:
if
(!compressor.recommendedUses().contains(ICompressor.Uses.FAST_COMPRESSION))
{
// The default compressor is generally fast (LZ4 with
16KiB block size)
compressionParams = CompressionParams.DEFAULT;
break;
}
{code}
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17744163#comment-17744163
]
Michael Semb Wever commented on CASSANDRA-12937:
I would expect the flush_compression to always take precedence when flushing.
`nodetool snapshot` shouldn't change anything, flushing is flushing…
At flush time the sstable_compression setting should not be used, the table
created already has a compressor assigned. When flushing it is used if
`flush_compression=table` or `flush_compression=fast AND table compressor is
fast`. If `flush_compression=none` then no compression is used. If
`flush_compression=fast` and the table's compressor is not fast then lz4 is
used.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17744151#comment-17744151
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I want to highlight one not-so-obvious consequence of introducing this patch.
There is flush_compression property in cassandra.yaml doing this:
{code}
# Compression to apply to SSTables as they flush for compressed tables.
# Note that tables without compression enabled do not respect this flag.
#
# As high ratio compressors like LZ4HC, Zstd, and Deflate can potentially
# block flushes for too long, the default is to flush with a known fast
# compressor in those cases. Options are:
#
# none : Flush without compressing blocks but while still doing checksums.
# fast : Flush with a fast compressor. If the table is already using a
#fast compressor that compressor is used.
# table: Always flush with the same compressor that the table uses. This
#was the pre 4.0 behavior.
#
# flush_compression: fast
{code}
By default, "fast" compressor is LZ4, it will use that one.
So, by default, "fast" compressor is used for flushing (LZ4). Hence, if one
does "nodetool snapshot", it will do snapshots of all tables, user defined as
well as system tables and it is compressed with LZ4.
If one specifies a default compressor to be used in newly introduced
"sstable_compression" field, two situations might happen:
1) the default compressor is not "fast" (check ICompressor.Uses and
ICompressor.recommendedUses()), that means that we need to fallback to a fast
compressor - it will default to LZ4
2) the default compressor is fast - so we are going to flush *system* tables
with a *custom, user-specified, ICompressor*.
I want to be sure that we are on the same page. While it makes sense to do it
like that - a user specified a custom compressor to use - that also means that
system tables will be compressed with that compressor as well. I want to be
sure everybody is OK with this.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17736412#comment-17736412
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
hi [~claude] , do you plan to try to finish this? I feel like we are very close
to the finish! I am not sure what would Mick's suggestions translate to right
now but we just cant drop the ball so close to the completion ...
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Priority: Low
> Labels: AdventCalendar2021
> Fix For: 5.x
>
> Time Spent: 4h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17729083#comment-17729083
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] we got a second review from Mick here (1).
Feel free to take my branch and base further work on top of that. I think we
should consolidate all the branches and continue to work just on one and
discard the rest.
(1) https://github.com/apache/cassandra/pull/2282#issuecomment-1575564266
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Stefan Miklosovic
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17727539#comment-17727539
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] I will assign this to myself temporarily to reflect my progress on
fixing the tests. I am pretty close to finish it.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17727194#comment-17727194
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I believe I fixed units, I will focus on cqlsh/dtests next soon.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17727181#comment-17727181
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
this is j11 build
https://app.circleci.com/pipelines/github/instaclustr/cassandra/2329/workflows/03d396b7-6356-45da-87f6-a3540f69ecd1
I would focus on the failed units first:
https://app.circleci.com/pipelines/github/instaclustr/cassandra/2329/workflows/03d396b7-6356-45da-87f6-a3540f69ecd1/jobs/42564/tests
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17725262#comment-17725262
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I added all my changes and fixed tests in this branch
https://github.com/instaclustr/cassandra/commits/CASSANDRA-12937
I am running a Jenkins build to see how it looks. We still need to cover python
dtests.
Feel free to go through that branch. I squashed and rebased your patch and
applied changes on top.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17725115#comment-17725115
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
There are few hundreds of errors in tests
https://ci-cassandra.apache.org/view/patches/job/Cassandra-devbranch/2471/#showFailuresLink
It all seem to fail on "Unknown compression options: ([sstable_compression])"
We stopped to use this as it was deprecated so we removed it but tests are
still using it.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17723727#comment-17723727
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I will do the review the first thing next week. Thank you very much for your
perseverance in this matter. It is truly admirable to still stick around after
such a long-lasting communication ping-pong.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17722847#comment-17722847
]
Claude Warren commented on CASSANDRA-12937:
---
[~smiklosovic] Done. I will rewrite log after approval of the code
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17722728#comment-17722728
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] could you please rebase and resolve conflicts and squash to have the
review easier? Thanks.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17719800#comment-17719800
]
Claude Warren commented on CASSANDRA-12937:
---
I did not modify the code path for the commit_log_compression (or any other
compression other than sstable_compression) . CommitLog does not create a
CompressionParams object from the configuration it just constructs an
ICompression instance. That path is not affected by the changes in the pull
request. We can add that later but it was not included in this change.
There was a path where unrecognised variables were not detected. That has been
corrected and tests added.
There was an issue with chunk_length_in_kb not being serialized to the map
correctly in some cases. That has been corrected and tests added.
The commented out configuration in the yaml file is not functional if
uncommented.
Additional comments were added to explain the items that were previously
explained by the broken configuration. (e.g. max_compressed_length needing to
have the GiB, MiB, KiB suffix)
Additional comment was added to specify that all parameter values must be
strings.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17719320#comment-17719320
]
Michael Semb Wever commented on CASSANDRA-12937:
bq. I am also little bit puzzled by the git workflow here, all I see is that
you "merged" trunk into that branch. When I checkout that I do not see the
history so I am not sure how we want to squash and merge this.
Yeah, please reserve merges only for forward-merging from release branches.
Feature/dev branches should be rebased.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17719227#comment-17719227
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I did another round of review:
When I do this
{code:java}
commitlog_compression:
- class_name: lz4
parameters:
- enable: "true"
lz4_compressor_type: "fast" {code}
This does not work:
{code:java}
Caused by: org.apache.cassandra.exceptions.ConfigurationException: Could not
create Compression for type org.apache.cassandra.io.compress.lz4
at
org.apache.cassandra.schema.CompressionParams.parseCompressorClass(CompressionParams.java:338)
at
org.apache.cassandra.schema.CompressionParams.createCompressor(CompressionParams.java:396)
at
org.apache.cassandra.db.commitlog.CommitLog$Configuration.(CommitLog.java:630)
at org.apache.cassandra.db.commitlog.CommitLog.(CommitLog.java:107)
at org.apache.cassandra.db.commitlog.CommitLog.construct(CommitLog.java:92)
at org.apache.cassandra.db.commitlog.CommitLog.(CommitLog.java:77)
{code}
I would expect similar errors to be found when trying aliases for other
_compression configuration properties.
Next, the default configuration for sstable_compression which is currently this
does not work:
{code:java}
sstable_compression:
# - class_name: lz4
# parameters:
# - enable: true
# chunk_length: 16KiB
# min_compress_ratio: 0.0
# max_comrpessed_length: 16KiB
# class_specific_parameter: value {code}
When I uncomment it like this:
{code:java}
sstable_compression:
- class_name: lz4
parameters:
- enable: true
chunk_length: 16KiB
min_compress_ratio: 0.0
max_comrpessed_length: 16KiB
class_specific_parameter: value {code}
First of all it says that:
{code:java}
Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to
java.lang.CharSequence
at
org.apache.cassandra.schema.CompressionParams.copyOptions(CompressionParams.java:406)
at
org.apache.cassandra.schema.CompressionParams.fromParameterizedClass(CompressionParams.java:160)
at
org.apache.cassandra.schema.CompressionParams.defaultParams(CompressionParams.java:150)
at
org.apache.cassandra.schema.TableParams$Builder.(TableParams.java:353)
at org.apache.cassandra.schema.TableParams.builder(TableParams.java:119)
{code}
This means that it expects values to be strings, so I do it like this:
{code:java}
sstable_compression:
- class_name: lz4
parameters:
- enable: "true"
chunk_length: "16KiB"
min_compress_ratio: "0.0"
max_comrpessed_length: "16KiB"
class_specific_parameter: "value" {code}
But it says:
{code:java}
Caused by: org.apache.cassandra.exceptions.ConfigurationException: Unknown
compression options enable
at
org.apache.cassandra.schema.CompressionParams.createCompressor(CompressionParams.java:358)
at
org.apache.cassandra.schema.CompressionParams.(CompressionParams.java:260)
at
org.apache.cassandra.io.compress.CompressionMetadata.open(CompressionMetadata.java:94)
... 15 common frames omitted {code}
I think this has to be changed to "enabled" as it is "enabled" in trunk too.
Next, it does not seem to me that the value of "lz4" is picked up because if I
do this:
{code:java}
sstable_compression:
- class_name: lz4
parameters:
- enabled: "true"
chunk_length: "16KiB"
min_compress_ratio: "0.0"
max_comrpessed_length: "16KiB"
class_specific_parameter: "value"
{code}
it does not say that the "class_specific_parameter" is invalid, check this:
when I do
{code:java}
sstable_compression:
- class_name: LZ4Compressor
parameters:
- enabled: "true"
chunk_length: "16KiB"
min_compress_ratio: "0.0"
max_comrpessed_length: "16KiB"
class_specific_parameter: "value" {code}
it throws:
{code:java}
Caused by: org.apache.cassandra.exceptions.ConfigurationException: Unknown
compression options class_specific_parameter
at
org.apache.cassandra.schema.CompressionParams.createCompressor(CompressionParams.java:358)
at
org.apache.cassandra.schema.CompressionParams.lambda$fromClassAndOptions$0(CompressionParams.java:228)
at
org.apache.cassandra.schema.CompressionParams.fromClassAndOptions(CompressionParams.java:229)
at
org.apache.cassandra.schema.CompressionParams.fromParameterizedClass(CompressionParams.java:160)
at
org.apache.cassandra.schema.CompressionParams.defaultParams(CompressionParams.java:150)
at
org.apache.cassandra.schema.TableParams$Builder.(TableParams.java:353)
at org.apache.cassandra.schema.TableParams.builder(TableParams.java:119)
at
org.apache.cassandra.cql3.statements.schema.TableAttributes.validate(TableAttributes.java:60)
at
[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17718882#comment-17718882
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
That is a good question. I think we are going too deep here if it is not
removable easily. I would just leave it out and remove only stuff which does
not spill over to the other parts of the code base. We may eventually create a
ticket for looking into this specifically.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17718870#comment-17718870
]
Claude Warren commented on CASSANDRA-12937:
---
[~smiklosovic], since the aliases are defined in the CompressionParams class
they could be used anywhere. Good observation.
The crcCheckChance parameter was removed but the crcCheckChance variable still
exists because there are getter/setter functions that are used in other code.
Is the intention to remove the crcCheckChance from all code, just the
CompressionParams or ???
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17716385#comment-17716385
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
btw, [~claude] , I was thinking about these aliases ... is there any reason we
alias only in sstable_compression? Why not to use these aliases in every place
we compress?
I would dedicate a separate ticket for that. I would leave aliasing out of this
ticket and I would cover it for all other ParameterizedClass-es separately.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17716340#comment-17716340
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Great progress!
I created a PR against your branch
[https://github.com/Claudenw/cassandra/pull/1]
It is just about formatting.
I left bunch of comments on the PR.
I also do not see the logic around aliases. You might probably take it from my
branch I posted lastly where it is done ...
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17715674#comment-17715674
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Thanks [~claude] , I ll take a look tomorrow.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17714856#comment-17714856
]
Claude Warren commented on CASSANDRA-12937:
---
[~smiklosovic], [~mck]
Please review [Github Pull Request
#2254|https://github.com/apache/cassandra/pull/2254] there are a number of
changes.
* switched to ParameterizedClass for yaml configuration
* ensured processing to support CQL compression parameters
* added extensive yaml file documentation.
* moved methods used only in testing from CompressionParams to a new
TestingCompressionParamsFactory class.
* updated tests to use TestingCompressionFactory.
* added extensive testing to ensure that all combinations of Map and
ParameterixedClass construct the same CompressionParams.
* added additional testing coverage or pre-existing methods
* unified error reporting so that the same error on different paths reports
with the same text.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17714848#comment-17714848
]
Claude Warren commented on CASSANDRA-12937:
---
Code rebased to trunk
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713611#comment-17713611
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] I ll go through that table soon. Give me some time here please. But
if we somehow put together this format with overhauled config param names I
think we should be good. We should preserve backward compatibility and we
should not fail anything which does not fail currently.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713597#comment-17713597
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
https://github.com/apache/cassandra/pull/2281
1. flat map
2. ParameterizedClass - same stuff as everywhere
3. new format of values supported
4. some parameters / their names were deprecated in 3.0 so they can be removed
in 5.0.
{code}
#sstable_compression:
# - class_name: "org.apache.cassandra.io.compress.LZ4Compressor"
#parameters:
#- chunk_length: "32KiB"
# min_compress_ratio: "0"
{code}
{code}
#sstable_compression:
# - class_name: "org.apache.cassandra.io.compress.LZ4Compressor"
#parameters:
#- chunk_length_in_kb: "32"
# min_compress_ratio: "0"
{code}
All this works.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713592#comment-17713592
]
Claude Warren commented on CASSANDRA-12937:
---
OK. Here is my proposal
||Parameter||CompressionParam
Map (input)||CompressionParam
Map (output)||CompressionParam as Serializer||CQL||Notes||
|chunk_length_in_kb |X|X|X|X| |
|chunk_length_kb|X| | | | |
|chunk_length|X| | | |chunk length with DataStorageSpec suffix|
|crc_check_chance|X| | |X|Accepted but ignored and removed from map.
This is the current operation|
|min_compress_ratio|X|X| | | |
|max_compressed_length|X| |X| |DataStorageSpec suffix|
|lz4_compressor_type|X|X|X|X|left in options for ICompressor construction|
|{{lz4_high_compressor_level}}|X|X|X|X|left in options for ICompressor
construction|
|{{compression_level}}|X|X|X|X|left in options for ICompressor construction|
|(arbitrary parameter)|X|X|X| |left in options for ICompressor construction|
All of the parameters will be accepted.
Conflicts of input will be handled as follows:
* multiple chunk_length type parameters (chunk_length, chunk_length_kb,
chunk_length_in_kb) will result in a ConfigurationException
* Specifying both min_compress_ratio and max_compressed_length will result in
a ConfigurationException.
* crc_check_chance processing will not change.
I think this meets the requirements for CQL configuration copy paste as well as
YAML properties expressed with DataStoreageSpec suffix.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713571#comment-17713571
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I again do not have any clear answer why we are "extracting" something and then
we have extra parameterized class with further options.
_Currently CompressionParams takes the class name and the parameters. It
extracts chunk_length_kb (or chunk_length_in_kb) and min_compress_ratio from
the parameters and uses them to build the CompressionParams instance._
Do not you just try to copy the same approach as in "CompressionParams extracts
these parameters so we need to apply same extraction in cassandra.yaml"? Why is
the extraction like it is suggested important? Why we can not flatten the
configuration? It is quite questionable why we are having nested sections like
that when, from ux perspective, it is truly just a map. The fact that we are
doing something internally in some fashion does not mean that it has to
manifest into the configuration in cassandra.yaml.
If we want to support same values as in other places in cassandra.yaml but have
nice flat map (preferably), would not it be possible to translate these values
internally into the old values? Or even better, would it be possible to have
new value parameters in cassandra.yaml but they would be transformed internally
into the old values? The most idealistic option would be to start to support
the same format of values for parameters in cassandra.yaml in CQL as well.
I do not think that without further discussion how this should be modeled and
reaching broader consensus this ticket is close to the actual merging.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713551#comment-17713551
]
Michael Semb Wever commented on CASSANDRA-12937:
I would rather see consistency in the cassandra.yaml
Please use parameter names and unit as is the new style in the yaml. It does
not need to match the cql style.
If it is needed to have an extra class to support this, it is not a headache or
an obsession. I also don't have any opinion about whether the extra top-level
options (chunk_length, maxCompressedLength, minCompressRatio) should be above
the parameter map or in it. I do see the issue with having to transform names
and values inside the map as being clumsy and potentially error prone.
Neither hints_compression or commitlog_compression supports customising the
chunk_length AFAIK.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713549#comment-17713549
]
Claude Warren commented on CASSANDRA-12937:
---
I am trying to follow the guidance I was given. At this point I think we need
to have a discussion on the dev mailing list to arrive at a consensus of how
this should be done.
Currently CompressionParams takes the class name and the parameters. It
extracts chunk_length_kb (or chunk_length_in_kb) and min_compress_ratio from
the parameters and uses them to build the CompressionParams instance.
The table below outlines the parameters and where they are used. Blue cells
indicate proposed changes.
||Parameter||CompressionParam as map||CompressionParam as
Serializer||CQL||Notes||
|chunk_length_in_kb |X|X|X| |
|chunk_length_kb|(deprecated - read not written)| | | |
|chunk_length|X( proposed)| | |chunk length with DataStorageSpec suffix|
|crc_check_chance|(deprecated - read not written )| |X|crc_check_chance is not
used in CompressionParam|
|min_compress_ratio|X| | | |
|max_compressed_length| |X| |Proposed to add to map input as a string with
DataStorageSpec suffix|
|lz4_compressor_type|X|X|X| |
|{{lz4_high_compressor_level}}|X|X|X| |
|{{compression_level}}|X|X|X|Zstd compressor param|
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713529#comment-17713529
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
All I prefer to see is to have a simple map of parameters into
ParametrizedClass which would have exactly same names as for their CQL
counterparts. They would be literally just used there. There does not seem to
be any collisions with that. I do not get the "obsession" with having
parameters for these compressors to follow the same names of CompressionParams.
_The CompressionParams has 3 parameters that it extracts or creates from the
parameters in the ParameterizedClass._
why do they have to be extracted in the first place?
for hints_compression in yaml we have:
{code}
# Compression to apply to the hint files. If omitted, hints files
# will be written uncompressed. LZ4, Snappy, and Deflate compressors
# are supported.
#hints_compression:
# - class_name: LZ4Compressor
# parameters:
# -
{code}
For commitlog_compression we have:
{code}
# Compression to apply to the commit log. If omitted, the commit log
# will be written uncompressed. LZ4, Snappy, and Deflate compressors
# are supported.
# commitlog_compression:
# - class_name: LZ4Compressor
# parameters:
# -
{code}
for sstable_compression, I would prefer to see the exact same way of the
configuration. Why are we trying to introduce completely custom way of the
configuration which nowhere else with exacting some parameters outside? Why we
can not use same stuff?
I do not think that we should blindly follow "the parameters names and their
units". I think we already discussed this. I already explained all advantages
of following what we have there already. If we make it explicitly clear that
these parameters are exactly same as if they would be put into compression
params upon table creation, they would save us a lot of headache to have
something completely custom and people would need to put there parameters and
their names as they are used to. We do we want to change all of this to further
confuse the user?
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713524#comment-17713524
]
Claude Warren commented on CASSANDRA-12937:
---
hints_compression and commitlog_compression use the standard ParameterizedClass.
The CompressionParams has 3 parameters that it extracts or creates from the
parameters in the ParameterizedClass. The parameters in CompressionParams are
{code:java}
private final int chunkLength;
private final int maxCompressedLength; // In content we store max length to
avoid rounding errors causing compress/decompress mismatch.
private final double minCompressRatio; // In configuration we store min ratio,
the input parameter.
{code}
The ParameterizedClass constructor that accepts the Map of
options expects a key of "chunk_length_in_kb" or "chunk_length_kb" as well as
a "min_compress_ratio".
This change I made does not change the hints_compression or
commitlog_compression options.
The yaml file has an additional set of requirements:
* The chunkLength (yaml: chunk_length) should be specified with the
DataStorageSpec suffix (e.g. KiB).
* The maxCompressedLength should be accepted as a parameter.
* The maxCompressedLength (yaml: max_compressed_length) should be specified
with the DataStorageSpec extensions (e.g. KiB).
* maxCompressedLength and minCompressRatio are related to each other via
chunk_length; so only one can be specified.
I could work chunkLength and maxCompressedLength into the class_name
parameters, however, I believe this will result in adding 2 more reserved words
both of which will need to be removed from the parameter list. This change
will affect all CompressionParams constructions that use the
Map format.
I will make the change with the following processes for determining collision
values:
* If both max_compressed_length and min_compress_ratio are specified an
ConfigurationException will be thrown.
* if both chunk_length and either chunk_length_in_kb or chunk_length_kb are
specified and they are not equal ConfiguraitonException will be thrown.
* if chunk_length or max_compressed_length are specified and do not use the
DataStorageSpec suffix a ConfigurationException will be thrown
I will also ensure that the short names: lz4, none, noop, snappy, deflate, and
zstd will work as class names and use the defaults specified by the
CompressionParams methods of the same names.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713478#comment-17713478
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I disagree. I will try to finish my view on this ticket soon to compare the
ideas. I have a feeling we are moving in circles here.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713416#comment-17713416
]
Claude Warren commented on CASSANDRA-12937:
---
Because if I have some compressor X that has a property called "chunk_length"
then
{code:java}
sstable_compression:
- class_name: org.apache.cassandra.io.compress.X
parameters:
- chunk_length: 15
{code}
Will collide with the "chunk_length" for the CompressionParams. It is
semantically clearer what the chunk_length is for.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713056#comment-17713056
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Why do you insist on this:
{code}
sstable_compressor:
chunk_length: 16KiB
min_compress_ratio: 0.0
class_name: org.apache.cassandra.io.compress.LZ4Compressor
parameters:
- param1 : value
{code}
Instead of doing like this:
{code}
sstable_compression:
- class_name: org.apache.cassandra.io.compress.LZ4Compressor
parameters:
- param1: "value1"
whateverParams .
{code}
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713054#comment-17713054
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I do not understand. There might be no collisions whatsoever if we make
sstable_comression in Config of type ParametrizedClass as mentioned above.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713051#comment-17713051
]
Claude Warren commented on CASSANDRA-12937:
---
[https://github.com/apache/cassandra/pull/2254/files] is the correct one.
Yes, it still has SSTableCompressionOptions, SSTableCompressionOptions are
used to store the non class-name configuration options. The "properties"
within the SSTableCompressionOptions contains the properties for the
"class-name" instantiation. In this way we don't have any property name
collisions.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17713027#comment-17713027
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Are we talking about this? https://github.com/apache/cassandra/pull/2254/files
There is still SSTableCompressionOptions in Config.
Am I reviewing the correct branch?
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17712982#comment-17712982
]
Claude Warren commented on CASSANDRA-12937:
---
[~mck] [~smiklosovic] I posted updates to the pull requests that I think
resolve all the issues. Please take a look.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17710953#comment-17710953
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] I think it we are half-way there.
This in Config.java
{code}
public SSTableCompressionOptions sstable_compressor;
{code}
should be like this
{code}
public ParameterizedClass sstable_compressor;
{code}
to achieve this:
{code}
sstable_compression:
- class_name: org.apache.cassandra.io.compress.LZ4Compressor
parameters:
- param1: "value1"
{code}
and
{code}
sstable_compression:
- class_name: my.custom.compressor.Implementation
parameters:
- param2: "value2"
{code}
Right now, we need to treat custom implementations like a special case. A user
has to make a difference between "custom compressor" and "compressor bundled in
Cassandra". Why do we need such differentiation? We should treat all
compressors equal when it comes to their configuration. I do not see why we
would do that otherwise.
I am looking forward to the next iteration of the code!
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17710853#comment-17710853
]
Claude Warren commented on CASSANDRA-12937:
---
I reworked [https://github.com/apache/cassandra/pull/2254] Please take a
look. It has all the options from the earlier fix but not the removal of
"type" and the defaulting of additional options as parameters to the compressor
class.
those changes should now be limited to CompressionParams.java and
CompressionParamsTest.java
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17710831#comment-17710831
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Great [~claude], I ll try to finish that soonish and it would be great if you
participated in the review.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17710441#comment-17710441
]
Claude Warren commented on CASSANDRA-12937:
---
[~smiklosovic] your alias solution sounds good to me.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709357#comment-17709357
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Why not to leverage already existing infrastructure around ParameterizedClass
and things it offers? It would be on par with already existing configuration
like seed_provider. Please take a look at comments Mick added here
https://github.com/apache/cassandra/pull//files and our discussion around
it. As I see it, it will really fit the narrative. From what you described, I
just do not see the benefits. So in a nutshell, it would be like:
{code}
sstable_compression:
- class_name: org.apache.cassandra.io.compress.LZ4Compressor
parameters:
- param1: "value1"
{code}
class_name might be FQCN or just simple name (LZ4Compressor, if it is in
o.a.c.i.c package), or just "lz4" to have it aliased. So we do not need "type".
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709354#comment-17709354
]
Claude Warren commented on CASSANDRA-12937:
---
How about we settle on something like this:
sstable_compressor has several standard parameters:
* enabled - defaults to true. If false no other parameters may be specified.
(original operation for flag)
* chunk_length – defaults to 16KiB. Converts to chunk_length_in_kb in the
CompressorParams (optional)
* type - A standard type of compression: must be one of none, noop, lz4,
snappy, deflate zstd (optional)
* class_name – standard class_name for compressor class to load. (optional)
* min_compress_ratio – defaults to 0.0 (optional)
* max_compressed_length – defaults to Integer.MAX_VALUE (optional)
type and class_name are mutually exclusive and one must be specified. Type
will define the standard types and class_name specify class to load. Class
must accept a Map constructor.
min_compress_ratio and max_compressed_length are mutually exclusive. If
neither is specified a min_compress_ratio of 0.0 is used (current default).
Any other parameters specified are assumed to be arguments passed to the
class_name constructor.
{code:java}sstable_compressor:
class_name: org.apache.cassandra.io.compress.LZ4Compressor.class
lz4_compressor_type: fast
{code}
and
{code:java}sstable_compressor:
type: lz4
lz4_compressor_type: fast
{code}
are the same
We also need to move the {{SSTableCompressionOptions.getCompressionParams()}}
functionality into the {{CompressionParams.fromOptions()}} method to remove the
schema package dependency from the config class.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 3h
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709310#comment-17709310
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
The configuration is validated by mean of instantiating a compressor upon
node's startup if you meant that. If we put there some parameter / value which
is not recognized by a specific compressor, it will fail to create it so I
think we are OK in that regard.
I will try to come up with a solution how to not introduce schema package
dependency (CompressionParams) into DatabaseDescriptor.
[~claude] I hope that it is OK if I join here for a while to move this forward.
Please let me know if you want to work on this on your own completely, I may
just delegate this to you. As you wish ... I do not want to hijack this.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709306#comment-17709306
]
Michael Semb Wever commented on CASSANDRA-12937:
bq. 6) uses same code path for getting CompressorParams, no new classes and
boiler-plate code necessary
It's not about "so and so format", it's about the validation paths and
behaviour being different.
Please also don't be introducing schema package dependencies into the config
classes.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709261#comment-17709261
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I think being consistent with CQL as well as be prepared for the future so we
can specify any compressor without changing anything is more important.
To summarise:
1) consistency with CQL
2) zero learning curve, a user just puts there what he is used to
3) any future in-built compressor supported out of the box so we do not need to
think about it and we do not need to change other enums, switches etc to
support that
4) custom compressor supported as well
5) any parameters possible to add
6) uses same code path for getting CompressorParams, no new classes and
boiler-plate code necessary
7) One way of specifying in-built compressor as well as the custom one, we do
not need to do any difference between them
8) We can configure every single parameter of a compressor, not only that
helper creation functions offer us
I really think that all these points in total beats the argument that we need
to have parameters in "so and so format". If we are transparent about the fact
that what is used in CQL is accepted in sstable_compressor map, it is really a
no-brainer.
[~mck] what do you think?
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709226#comment-17709226
]
Claude Warren commented on CASSANDRA-12937:
---
Looking at CompressionParams there are a number of default configurations e.g.
snappy(), lz4(), and noCompression() that I thought would be in common use.
What I wanted to do was to provide an easy way to get to call those methods as
well as provide the ability to load any compressor via the map.
Also, early on the idea of putting chunk_length_in_kb was rejected with the
"16KiB" form for the input requested.
If it is agreed to remove the shortcuts and use the simple map form with the
parameters I'll make those changes.
I did come across a note that says that configuration file and CQL use
different parameters for compression, thus I onluy implemented
min_compress_ratio and used it to calculate max_compression_length.
So I got to where the code is by trying to support the defaults in
CompressonParams and following the min_compress_ratio not
max_compression_length in the config files.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709083#comment-17709083
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I did it here https://github.com/apache/cassandra/pull//files
The configuration is as simple as this:
{code}
sstable_compressor:
class: "org.apache.cassandra.io.compress.LZ4Compressor"
chunk_length_in_kb: "16"
min_compress_ratio: "0"
{code}
Since sstable_compressor is a map, it may contain whatever parameters. The
creation of compressor / validation is done upon node's startup.
This solution is prepared for whatever compressor, whatever parameters and it
accepts same parameters as specified in CQL so there nothing new to learn.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709048#comment-17709048
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude]
I have one question though ... as I look into it, currently, the configuration
is done like this, imagine I want to configure Zstd compression, so I would do:
{code}
sstable_compressor:
# defaults to true
enable: true
# defaults to 16KiB
chunk_length: 16KiB
# min_compress_ratio is only used in snappy, lz4, and custom implementations.
# defaults to 0.0 see CompressionParams.DEFAULT_MIN_COMPRESS_RATIO
#min_compress_ratio: 0.0
# type should be one of the `CompressorType` values: none, noop, lz4, snappy,
deflate, zstd or custom
type: zstd
# if custom type is specified compressor class and parameters must be provided
#compressor:
#- class_name: org.apache.cassandra.io.compress.LZ4Compressor # the
compressor class
# parameters:
#- param1 : value
{code}
However, by doing so, I can not use the same parameters as used upon CREATE
TABLE ... For example, I can not specify "compression_level". Where would I put
it.
Similarly, we basically lost a way how to use already existing options.
Currently, we would call this below, but where are other options?
{code}
case zstd:
return CompressionParams.zstd(chunk_length_in_kb);
{code}
It is good that there is general "compressor" field, but why not to simply call
"CompressionParams.fromMap(Map)" instead of
"SSTableCompressionOptions.getCompressionParams()"? So whole configuration
would be basically a map of parameters, same as we use it upon CQL creation.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709025#comment-17709025
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
also clean j11
[https://app.circleci.com/pipelines/github/instaclustr/cassandra/2055/workflows/3ec6e5cf-36bf-45aa-a794-27a88a1ee0de]
[~mck] would you take a look? on this branch, please?
[https://github.com/instaclustr/cassandra/commits/CASSANDRA-12937]
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17709018#comment-17709018
]
Claude Warren commented on CASSANDRA-12937:
---
Your's is tested and fixed so let's go with that.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17708896#comment-17708896
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
clean j8 precommit on my branch
https://app.circleci.com/pipelines/github/instaclustr/cassandra/2055/workflows/6e2f2a8a-c8e9-4a9f-a5c9-af9cf6b59b2b
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17708537#comment-17708537
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I added fixes here (1), exactly this commit (2).
The code was not compilable, it was failing on ant rat. Also, it seems to me
that you used Java 9 / 11 as String.isBlank() is not in Java 8 yet to it failed
to compile it.
There are also various formatting improvements etc.
I am building it as we speak.
(1) https://github.com/instaclustr/cassandra/commits/CASSANDRA-12937
(2)
https://github.com/instaclustr/cassandra/commit/95422f915fb30c27e4691fbc5711b3361d0331a3
You are welcome to git cherry-pick this commit on top of your branch or we will
just ship my branch (squashed with you as author).
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17707961#comment-17707961
]
Claude Warren commented on CASSANDRA-12937:
---
I did a rework of [https://github.com/apache/cassandra/pull/2199] to fix the
issues. [~smiklosovic] , I also created a new PR with the code rebased against
trunk. That PR is https://github.com/apache/cassandra/pull/2254
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17701674#comment-17701674
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
there is a lot of failures. I think it is mostly about the setting in
test/conf/cassandra.yaml - enable flag true / false. Describe statement tests
are also failing as the output we started to produce does not match what was
there before.
https://app.circleci.com/pipelines/github/instaclustr/cassandra/2005/workflows/c9679e4c-c3e1-42a6-b0d6-10a047b30ace
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17701129#comment-17701129
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
Nevermind, I rebased it on my own here:
[https://github.com/apache/cassandra/pull/]
I ll run CI soon.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17701098#comment-17701098
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
[~claude] would you mind to rework that PR against trunk? I am getting a lot of
conflicts. This is a new feature and should be delivered in 5.0 first.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
> Fix For: 5.x
>
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17701090#comment-17701090
]
Stefan Miklosovic commented on CASSANDRA-12937:
---
I think we are at the end of the review. I will run a CI to see how it behaves.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
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https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17697448#comment-17697448
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Claude Warren commented on CASSANDRA-12937:
---
Created pull request: https://github.com/apache/cassandra/pull/2199
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Claude Warren
>Priority: Low
> Labels: AdventCalendar2021, lhf
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
> +Additional information for newcomers+
> Some new fields need to be added to {{cassandra.yaml}} to allow specifying
> the field required for defining the default compression parameters. In
> {{DatabaseDescriptor}} a new {{CompressionParams}} field should be added for
> the default compression. This field should be initialized in
> {{DatabaseDescriptor.applySimpleConfig()}}. At the different places where
> {{CompressionParams.DEFAULT}} was used the code should call
> {{DatabaseDescriptor#getDefaultCompressionParams}} that should return some
> copy of configured {{CompressionParams}}.
> Some unit test using {{OverrideConfigurationLoader}} should be used to test
> that the table schema use the new default when a new table is created (see
> CreateTest for some example).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17462665#comment-17462665
]
Benjamin Lerer commented on CASSANDRA-12937:
[~vinaykumarcse] I am looking for some LHF tickets for the Twitter Advent
Calendar and it does not seem that you are actively working on that issue. I
will unassign you from it to be able to use it for a newcomer. If it is an
issue for you do not hesitate to reasign it to yourself. :-)
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
>Reporter: Michael Semb Wever
>Assignee: Vinay Chella
>Priority: Low
> Labels: lhf
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
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[jira] [Commented] (CASSANDRA-12937) Default setting (yaml) for SSTable compression
[
https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16403211#comment-16403211
]
Vinay Chella commented on CASSANDRA-12937:
--
Good one. Yes, we have bitten by this in the past, I am picking it up.
> Default setting (yaml) for SSTable compression
> --
>
> Key: CASSANDRA-12937
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12937
> Project: Cassandra
> Issue Type: Improvement
> Components: Configuration
>Reporter: mck
>Priority: Minor
> Labels: lhf
>
> In many situations the choice of compression for sstables is more relevant to
> the disks attached than to the schema and data.
> This issue is to add to cassandra.yaml a default value for sstable
> compression that new tables will inherit (instead of the defaults found in
> {{CompressionParams.DEFAULT}}.
> Examples where this can be relevant are filesystems that do on-the-fly
> compression (btrfs, zfs) or specific disk configurations or even specific C*
> versions (see CASSANDRA-10995 ).
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