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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-975) explore upgrading CLHM
Date Mon, 14 Jun 2010 22:20:15 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12878777#action_12878777
] 

Jonathan Ellis commented on CASSANDRA-975:
------------------------------------------

We have probably 3 or 4 weeks before a 0.7 beta, so if you can improve average-case performance
by then, that would be great.

> explore upgrading CLHM
> ----------------------
>
>                 Key: CASSANDRA-975
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-975
>             Project: Cassandra
>          Issue Type: Task
>            Reporter: Jonathan Ellis
>            Assignee: Matthew F. Dennis
>            Priority: Minor
>             Fix For: 0.8
>
>         Attachments: 0001-trunk-975.patch, clhm_test_results.txt, insertarator.py, readarator.py
>
>
> The new version should be substantially better "on large caches where many entries were
readon large caches where many entries were read," which is exactly what you see in our row
and key caches.
> http://code.google.com/p/concurrentlinkedhashmap/issues/detail?id=9
> Hopefully we can get Digg to help test, since they could reliably break CLHM when it
was buggy.

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