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https://issues.apache.org/jira/browse/CASSANDRA-12937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17709083#comment-17709083
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Stefan Miklosovic edited comment on CASSANDRA-12937 at 4/5/23 7:39 PM:
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I did it here https://github.com/apache/cassandra/pull/2222/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 is nothing new to learn.
was (Author: smiklosovic):
I did it here https://github.com/apache/cassandra/pull/2222/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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