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Posted to commits@cassandra.apache.org by "Vijay (JIRA)" <ji...@apache.org> on 2012/07/18 03:01:54 UTC
[jira] [Updated] (CASSANDRA-3772) Evaluate Murmur3-based
partitioner
[ https://issues.apache.org/jira/browse/CASSANDRA-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vijay updated CASSANDRA-3772:
-----------------------------
Attachment: 0001-CASSANDRA-3772.patch
Made minor change format, added comments to yaml and modified Murmur3Partitioner to add
{code}
public static void writeLong(long src, byte[] dest, int offset)
{code}
I do see a bigger gain with faster disks.
> Evaluate Murmur3-based partitioner
> ----------------------------------
>
> Key: CASSANDRA-3772
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3772
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Pavel Yaskevich
> Fix For: 1.2
>
> Attachments: 0001-CASSANDRA-3772-Test.patch, 0001-CASSANDRA-3772.patch, MumPartitionerTest.docx, hashed_partitioner.diff, hashed_partitioner_3.diff, try_murmur3.diff, try_murmur3_2.diff
>
>
> MD5 is a relatively heavyweight hash to use when we don't need cryptographic qualities, just a good output distribution. Let's see how much overhead we can save by using Murmur3 instead.
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