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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7902) deletes may be removed during minor compaction, depending on file set
Date Mon, 25 Feb 2013 23:12:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13586434#comment-13586434
] 

Sergey Shelukhin commented on HBASE-7902:
-----------------------------------------

hmm, that is true. Well, I will repurpose this issue, looks like in default policy it cannot
be done without additional metadata in a yet more limited set of circumstances (i.e. assuming
most people don't use explicit timestamps we could store min-ts/max-ts and get benefit in
many cases).
                
> deletes may be removed during minor compaction, depending on file set
> ---------------------------------------------------------------------
>
>                 Key: HBASE-7902
>                 URL: https://issues.apache.org/jira/browse/HBASE-7902
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Minor
>         Attachments: HBASE-7902-v0.patch, HBASE-7902-v0-with-7843.patch
>
>
> Deletes are only removed during major compaction now. However, in presence of file ordering,
deletes can be removed during minor compaction too, as long as there's no file that is not
being compacted that is older than the files that are.

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