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From "Vijay (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-3772) Evaluate Murmur3-based partitioner
Date Wed, 18 Jul 2012 01:01:54 GMT

     [ 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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