Makes sense. Thanks!
-Original Message-
From: Joseph Lynch [mailto:joe.e.ly...@gmail.com]
Sent: Wednesday, September 26, 2018 9:02 PM
To: dev@cassandra.apache.org
Subject: Re: MD5 in the read path
>
> Thank you all for the response.
> For RandomPartitioner, MD5 is used to avoid collision
> > > > Regards,
> > > > Anirudh
> > > >
> > > > On Wed, Sep 26, 2018 at 7:14 PM Jeff Jirsa wrote:
> > > >
> > > > > In some installations, it's used for hashing the partition key to
> > find
> > &
Hi all,
I have a question about MD5 being used in the read path in Cassandra.
I wanted to understand what exactly it is being used for and why not something
like CRC is used which is less complex in comparison to MD5.
Thanks,
Preetika
Hi all,
I am trying to understand where exactly digests and checksums are being used in
Cassandra.
In my understanding,
Murmur3 hashing is used with murmur3 partitioning scheme which is also the
default configuration.
CRC32 is used for data corruption and repair.
MD5 is used for partitioning onl
provided at runtime aren't the same as the ones provided at compile time.
It might help to run with --keep-test-dir and then check the test directory for
Cassandra logs and review the classpath to make sure everything Cassandra is
being loaded up with makes sense.
Ariel
On Wed, Mar 28,
venv are lost when running in sudo.
>
>
> The advantage of virtualenv is not needing to mess with system
> packages at
> > all so sudo is inadvisable when creating, activating, and pip
> > installing things.
> >
> > You might need to use pip3 instead of pip,
ndencies: ``pip install -r
/path/to/cassandra-dtest/requirements.txt``
Regards,
Ariel
On Mon, Mar 26, 2018, at 11:13 AM, Tyagi, Preetika wrote:
> I was able to run requirements.txt with success. Below is the error I get:
>
> Traceback (most recent call last):
> File "/usr/local/li
, `pip3 install -r requirements.txt` creates an `src` directory with
appropriate branches of ccm and cassandra-driver checked out.
If you have run `pip3 install -r requirements.txt`, then something else is
wrong and we need the complete error log.
On 2018/03/23 20:22:47, "Tyagi, Preetika&
Hi All,
I am trying to setup and run Cassandra-dtests so that I can write some tests
for a JIRA ticket I have been working on.
This is the repo I am using: https://github.com/apache/cassandra-dtest
I followed all the instructions and installed dependencies.
However, when I run "pytest -cassandra
only just begun when the flush
triggered). It helps avoid these race conditions on either side of the
equation.
On 13 February 2018 at 22:09, Tyagi, Preetika
wrote:
> Hi all,
>
> I'm trying to understand the behavior of memtable when writes/flush
> operations are going on in p
Hi all,
I'm trying to understand the behavior of memtable when writes/flush operations
are going on in parallel.
In my understanding, once a memtable is full it is queued for flushing and a
new memtable is created for ongoing write operations.
However, I was looking at the code and it looks lik
d based on the
> clustering key (i.e. "time" in this case).
No. it will skip to the section of the partition with time = '12:00'.
Cassandra should be smart enough to avoid reading the whole partition.
On 31 January 2018 at 06:57, Tyagi, Preetika
wrote:
> So that mean
github account
On 01/30/2018 03:47 PM, Tyagi, Preetika wrote:
> Hi all,
>
> I'm working on the JIRA ticket CASSANDRA-13981 and pushed a patch
> yesterday, however, I have been suggested to create a branch in my
> github account and then push all changes into that. The patch
tition key supported?
A range query can be performed on the token of a partition key, not on the
value.
-Jeremiah
> On Jan 30, 2018, at 12:21 PM, Tyagi, Preetika
> wrote:
>
> Hi All,
>
> I have a quick question on Cassandra's behavior in case of partition keys. I
>
Hi all,
I'm working on the JIRA ticket CASSANDRA-13981 and pushed a patch yesterday,
however, I have been suggested to create a branch in my github account and then
push all changes into that. The patch is too big hence this seems to be a
better approach.
I haven't done it before so wanted to e
Hi All,
I have a quick question on Cassandra's behavior in case of partition keys. I
know that range queries are allowed in general, however, is it also allowed on
partition keys as well? The partition key is used as an input to determine a
node in a cluster, so I'm wondering how one can possib
, cell.timestamp());
return timestamp;
}
On Tue, Jan 23, 2018 at 4:22 PM, Tyagi, Preetika
wrote:
> Hi all,
>
> I'm trying to understand the behavior of simple and complex columns in
> Cassandra.
> I was looking at UnfilteredSerializer.java, serializeRowBody() checks
> f
Hi all,
I'm trying to understand the behavior of simple and complex columns in
Cassandra.
I was looking at UnfilteredSerializer.java, serializeRowBody() checks for a
timestamp flag and then only it writes it. In case of writeComplexColumn(),
there is no timestamp being written. Also, as per my
Hi,
I have a quick question on the code formatting for Cassandra using IntelliJ.
I found a code formatter JAR here for Cassandra:
https://wiki.apache.org/cassandra/CodeStyle?action=AttachFile&do=view&target=intellij-codestyle.jar
Does someone know how it can be imported to IntelliJ-Cassandra pro
Hi all,
When I click on "Submit Patch" option, it pops up a new screen where it asks
for a bunch of details including Fix Version(s). Does the patch need to be
synced up with the latest repo or I can just choose which version I worked with
(which may not necessarily be the latest and hence one
, December 20, 2017 6:09 PM
To: dev
Subject: Re: How to fetch replication factor of a given keyspace
I think you want:
Schema.instance.getKeyspaceMetadata
There is a ReplicationParams nested under there which should have everything
you need fully populated.
On Thu, Dec 21, 2017 at 2:02 PM, Tyagi
Hi,
If I need to get the replication factor of a given keyspace in nodetool
commands (e.g. status), how can I do that? I'm trying to figure it out for a
JIRA item I'm working on.
I tried using the below:
Keyspace keyspace = Keyspace.open(keyspaceName);
Int rf = keyspace.getReplicationStrategy()
unset CASSANDRA_HOME" if you haven't.
On Mon, Oct 23, 2017 at 11:49 AM, Tyagi, Preetika
wrote:
> Hi all,
>
> I might be missing something very simple here but it seems I cannot
> find a way to build tools/nodetool/* source files correctly in my dev set up.
>
> For example,
Hi all,
I might be missing something very simple here but it seems I cannot find a way
to build tools/nodetool/* source files correctly in my dev set up.
For example, when I make a simple code change in line 105
(System.out.println("Status=Up/Down");" in Status.java to print something else
and
Hi all,
Does anyone know the size of each chunk/block while appending it with a
checksum when writing to the disk in Cassandra? Is it the standard 512 bytes or
it varies?
Thanks,
Preetika
> On Sep 21, 2017, at 10:14 AM, Josh McKenzie wrote:
>
> It at least skips the CDC* tests unless you use the test-cdc target, as it
> needs some different .yaml configurations so runs as a separate job. Not
> sure about any other skips.
>
> On Thu, Sep 21, 2017 at 12:2
Hi all,
I downloaded and built the Cassandra project from GitHub and ran all unit tests
by running the below command:
ant test -Dtest.runners=4
When it finished, I saw >99% success rate, however, it also showed some number
under "Skipped" tests as well. Does someone know why would it skip some
Hi,
I'm trying to understand how Regions are being allocated and deallocated in
Memtable. I can see that the same region is being used to allocate more size
until the max region limit is hit.
However, once the max limit is reached, the current region is set to null and
eventually new Region get
ind if you work on it instead.
Sometimes people assign and then never work on it, and they won't mind if you
take it. Sometimes they'll have started but hit a road block, and may be able
to give you some code to start with. Just ask before you change the assignee.
- Jeff
On Tue, Sep 1
Hi all,
I'm trying to figure out different ways in which one can contribute to
Cassandra. I know one can create a ticket and assign it to himself to work on
it. However, is it also allowed to assign and work on an already existing
ticket created by someone else?
Thanks,
Preetika
nfiguration for Cassandra daemon
> * License header for Java source files
> * Cassandra code style
> * Inspections
You can just run `generate-idea-files` and then open the project in IDEA.
Code style settings should be automatically picked up by IDEA.
On Fri, 15 Sep 2017 at 14:46 Tyagi, Pr
+ 1
This is a good idea.
-Original Message-
From: beggles...@apple.com [mailto:beggles...@apple.com]
Sent: Friday, September 15, 2017 8:29 AM
To: dev@cassandra.apache.org
Subject: Re: Proposal: Closing old, unable-to-repro JIRAs
+1 to that
On September 14, 2017 at 4:50:54 PM, Jeff Ji
Hi all,
I was trying to configure the Cassandra code formatter and downloaded
IntelliJ-codestyle.jar from this link:
https://wiki.apache.org/cassandra/CodeStyle
After extracting this JAR, I was able to import codestyle/Default_1_.xml into
my project and formatting seemed to work.
However, I'm
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