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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7902) deletes may be removed during minor compaction, depending on file set
Date Fri, 22 Feb 2013 22:34:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HBASE-7902:
------------------------------------

    Attachment: HBASE-7902-v0-with-7843.patch
                HBASE-7902-v0.patch

Patch is be based on HBASE-7843, as the mechanism to propagate the flag will have to be different
before and after that, no sense to redo it twice. Attaching the actual patch and the combined
patch Apache will be able to apply. 

The patch changes ScanType semantics and names for compaction to be more precise, and changes
policy to set it based on whether we go from the oldest file. Piggybacked on existing test
to verify. 
                
> 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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