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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-6851) Improve anticompaction after incremental repair
Date Wed, 20 Aug 2014 11:29:26 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcus Eriksson resolved CASSANDRA-6851.
----------------------------------------

    Resolution: Fixed

committed, thanks!

> Improve anticompaction after incremental repair
> -----------------------------------------------
>
>                 Key: CASSANDRA-6851
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6851
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Marcus Eriksson
>            Assignee: Russell Alexander Spitzer
>            Priority: Minor
>              Labels: compaction, lhf
>             Fix For: 3.0
>
>
> After an incremental repair we iterate over all sstables and split them in two parts,
one containing the repaired data and one the unrepaired. We could in theory double the number
of sstables on a node.
> To avoid this we could make anticompaction also do a compaction, for example, if we are
to anticompact 10 sstables, we could anticompact those to 2.
> Note that we need to avoid creating too big sstables though, if we anticompact all sstables
on a node it would essentially be a major compaction.



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