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From "lantao yan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5078) save compaction merge counts in a system table
Date Tue, 10 Sep 2013 11:19:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13762966#comment-13762966
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lantao yan commented on CASSANDRA-5078:
---------------------------------------

sorry for the late update. pretty busy recently. even missed Jonathan's London meetup. :)
For the conflict on the entry, I don't quite get it. I read the code, it seems like one directory
(one column family) will be owned by one thread? so there won't be any chances, two threads
are working on the same column family with the same timestamp? I could be wrong. If I miss
something, please let me know.
                
> save compaction merge counts in a system table
> ----------------------------------------------
>
>                 Key: CASSANDRA-5078
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5078
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Matthew F. Dennis
>            Assignee: lantao yan
>            Priority: Minor
>              Labels: lhf
>         Attachments: 5078-v3.txt, 5078-v4.txt, patch1.patch
>
>
> we should save the compaction merge stats from CASSANDRA-4894 in the system table and
probably expose them via JMX (and nodetool)

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