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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7902) deletes may be removed during minor compaction, in non-standard compaction schemes
Date Tue, 26 Feb 2013 21:06:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587554#comment-13587554
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Sergey Shelukhin commented on HBASE-7902:
-----------------------------------------

bq. but in this case the compaction does have in principle all the information, and produce
a correct state at the time it runs.
Not counting memstore... so if we similarly don't count a couple storefiles we are just extending
the time window, not changing the behavior :)
Although I agree practically this should stay.
                
> deletes may be removed during minor compaction,  in non-standard compaction schemes
> -----------------------------------------------------------------------------------
>
>                 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, HBASE-7902-v1.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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