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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6428) Pluggable Compaction policies
Date Sun, 29 Jul 2012 03:54:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424485#comment-13424485
] 

Lars Hofhansl commented on HBASE-6428:
--------------------------------------

To be complete, this needs the new postFlush hook suggested in HBASE-6427.
                
> Pluggable Compaction policies
> -----------------------------
>
>                 Key: HBASE-6428
>                 URL: https://issues.apache.org/jira/browse/HBASE-6428
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Lars Hofhansl
>
> For some usecases is useful to allow more control over how KVs get compacted.
> For example one could envision storing old versions of a KV separate HFiles, which then
rarely have to be touched/cached by queries querying for new data.
> In addition these date ranged HFile can be easily used for backups while maintaining
historical data.
> This would be a major change, allowing compactions to provide multiple targets (not just
a filter).

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