[
https://issues.apache.org/jira/browse/CASSANDRA-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dave Brosius updated CASSANDRA-3772:
------------------------------------
Attachment: hashed_partitioner_3.diff
rework to remove MD5Partitioner and just have Random and Murmur3 as comments
suggested. Reworked Murmur3 to remove as many allocations as possible. Also
just flipped the top bit (rather than abs) to avoid object allocs. Different
then doing abs, but shouldn't effect distribution.
Still isn't a significant difference from MD5 tho
> 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: Dave Brosius
> Fix For: 1.2
>
> Attachments: 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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
