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From "Branimir Lambov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7019) Improve tombstone compactions
Date Mon, 04 Jul 2016 19:47:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15361744#comment-15361744
] 

Branimir Lambov commented on CASSANDRA-7019:
--------------------------------------------

Rebased and uploaded again to the same branch:
|[code|https://github.com/blambov/cassandra/tree/7019-rebased]|[utests|http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-testall/]|[dtests|http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-dtest/]|


> Improve tombstone compactions
> -----------------------------
>
>                 Key: CASSANDRA-7019
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7019
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Marcus Eriksson
>            Assignee: Branimir Lambov
>              Labels: compaction, fallout
>             Fix For: 3.x
>
>         Attachments: 7019-2-system.log, 7019-debug.log, cell.tar.gz, control.tar.gz,
none.tar.gz, row.tar.gz, temp-plot.html
>
>
> When there are no other compactions to do, we trigger a single-sstable compaction if
there is more than X% droppable tombstones in the sstable.
> In this ticket we should try to include overlapping sstables in those compactions to
be able to actually drop the tombstones. Might only be doable with LCS (with STCS we would
probably end up including all sstables)



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