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https://issues.apache.org/jira/browse/CASSANDRA-5862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13775864#comment-13775864
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Bert Sanders commented on CASSANDRA-5862:
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What is the gain from switching to xxHash ?
I mean, the proposed Hash might be very fast, but does it translate into real
world benefit ?
The speed of hash functions might be dwarfed by other effects.
Specifically, I'm interested in hash diversity. For a Bloom filter, this helps
getting better distribution, and reduce false positives. And I guess that's
where most of the gains should be expected.
> Switch to adler checksum for sstables
> -------------------------------------
>
> Key: CASSANDRA-5862
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5862
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: T Jake Luciani
> Fix For: 2.0.1
>
> Attachments: 5862.txt
>
>
> Adler is significantly faster than CRC32:
> http://java-performance.info/java-crc32-and-adler32/
> (Adler is weaker for short inputs, so we should leave the commitlog alone, as
> it checksums each mutation individually.)
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