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From "Chris Burroughs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5821) Test new ConcurrentLinkedHashMap implementation (1.4RC)
Date Fri, 30 Aug 2013 11:46:54 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754615#comment-13754615
] 

Chris Burroughs commented on CASSANDRA-5821:
--------------------------------------------

>  You probably are not asking for the count and only for better internal handling, right?

Yep, just looking for better handling.  Although if mappingCount() or any other new introspection
methods were available we would probably expose them.


                
> Test new ConcurrentLinkedHashMap implementation (1.4RC)
> -------------------------------------------------------
>
>                 Key: CASSANDRA-5821
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5821
>             Project: Cassandra
>          Issue Type: Test
>            Reporter: Ryan McGuire
>            Assignee: Ryan McGuire
>
> There are some [improvements being made to CLHM| https://code.google.com/p/concurrentlinkedhashmap/source/detail?r=888ad7cebe5b509e5e713b00836f5df9f50baf32]
that we should test.
> Create a small enough dataset that it can fit in memory and devise a test that has a
high key cache hit rate, and compare results to CLHM 1.3 we already use.

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