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https://issues.apache.org/jira/browse/HBASE-18165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16037650#comment-16037650
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Andrew Purtell commented on HBASE-18165:
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Filters or other transformations that run at compaction time are essentially
the Accumulo Iterators idea. We've had this proposed in other contexts. I guess
I have the same question now as then, why not implement support for
Accumulo-style Iterators? Something like
https://github.com/carlaustin/hbase-accumulo-iterators (Warning: Do not use
directly, not correctly licensed!)
> Predicate based deletion during major compactions
> -------------------------------------------------
>
> Key: HBASE-18165
> URL: https://issues.apache.org/jira/browse/HBASE-18165
> Project: HBase
> Issue Type: Brainstorming
> Reporter: Lars Hofhansl
>
> In many cases it is expensive to place a delete per version, column, or
> family.
> HBase should have way to specify a predicate and remove all Cells matching
> the predicate during the next compactions (major and minor).
> Nothing more concrete. The tricky part would be to know when it is safe to
> remove the predicate, i.e. when we can be sure that all Cells matching the
> predicate actually have been removed.
> Could potentially use HBASE-12859 for that.
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