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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-444) improve throughput for normal inserts on many-core systems
Date Sat, 19 Sep 2009 12:36:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757663#action_12757663
] 

Hudson commented on CASSANDRA-444:
----------------------------------

Integrated in Cassandra #202 (See [http://hudson.zones.apache.org/hudson/job/Cassandra/202/])
    r/m memtableLock; it is redundant wrt flusherLock
patch by jbellis; reviewed by junrao for 
cleanup; r/m unused code
patch by jbellis; reviewed by junrao for 
serialize row outside of commitlog executor to improve parallelizability
patch by jbellis; reviewed by junrao for 
move per-key locking inside Memtable and shard it.
patch by jbellis; reviewed by junrao for 


> improve throughput for normal inserts on many-core systems
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-444
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-444
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.5
>
>         Attachments: 0001-CASSANDRA-444-move-per-key-locking-inside-Memtable-and.txt,
0001-CASSANDRA-444-move-per-key-locking-inside-Memtable-and.txt, 0002-serialize-row-outside-of-commitlog-executor-to-improve.txt,
0002-serialize-row-outside-of-commitlog-executor-to-improve.txt, 0003-cleanup-r-m-unused-code.txt,
0003-use-putIfAbsent-to-avoid-locking-on-first-insert.txt, 0004-r-m-memtableLock-it-is-redundant-wrt-flusherLock.txt
>
>
> move the serialization of commitlog Row to the calling thread, not the CL executor
> shard the memtable lock
> others?

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