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https://issues.apache.org/jira/browse/CASSANDRA-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13239671#comment-13239671
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Sylvain Lebresne commented on CASSANDRA-3772:
---------------------------------------------
Did you guys tested on secondary index reads (with reasonably high
cardinality)? That's when MD5 was a bottleneck because then the column
comparator ends up redecorating keys over and over again. The normal read/write
path probably do only a handful of md5 computations, so I wouldn't be surprised
this doesn't make much difference.
> 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: hashed_partitioner.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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