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Posted to commits@cassandra.apache.org by "Stu Hood (JIRA)" <ji...@apache.org> on 2011/04/07 08:07:05 UTC
[jira] [Commented] (CASSANDRA-2313) CommutativeRowIndexer always
read full row in memory
[ https://issues.apache.org/jira/browse/CASSANDRA-2313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016708#comment-13016708 ]
Stu Hood commented on CASSANDRA-2313:
-------------------------------------
+1
This looks good, thanks Sylvain.
> CommutativeRowIndexer always read full row in memory
> ----------------------------------------------------
>
> Key: CASSANDRA-2313
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2313
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.8
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Fix For: 0.8
>
> Attachments: 0001-Introduce-CompactionController-to-handler-compaction-v2.patch, 0001-Introduce-CompactionController-to-handler-compaction.patch, 0002-Make-CommutativeRowIndexer-uses-AbstractCompactionRo-v2.patch, 0002-Make-CommutativeRowIndexer-uses-AbstractCompactionRo.patch
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> CommutativeRowIndexer use CFSerializer.deserializeColumns() that read the full row in memory. We should use PreCompactedRow/LazilyCompactedRow instead to avoid this on huge row.
> As an added benefit, using PreCompactedRow will avoid a current seek back to write the row size.
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