[jira] [Commented] (CASSANDRA-5722) Cleanup should skip sstables that don't contain data outside a nodes ranges

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732170#comment-13732170 ] 

Jonathan Ellis commented on CASSANDRA-5722:
-------------------------------------------

Can you rebase for the 2.0 branch?
                
> Cleanup should skip sstables that don't contain data outside a nodes ranges
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-5722
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5722
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Nick Bailey
>            Assignee: Tyler Hobbs
>             Fix For: 2.0.1
>
>         Attachments: 0001-Skip-cleanup-when-unneeded.patch
>
>
> Right now cleanup is optimized to simply delete sstables that *only* contain data that doesn't belong on the node, for all other sstables though, it will read them, check each row, and write out new sstables.
> Cleanup could be optimized to look at an sstable and determine that all data within the sstable does belong on a node, and therefore skip re-writing that sstable. This would make cleanup essentially a noop in the case where all data on a node belongs on that node.

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