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