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Date: Thu, 23 Jun 2016 19:01:16 +0000 (UTC)
From: "Philip Thompson (JIRA)" <jira@apache.org>
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Subject: [jira] [Comment Edited] (CASSANDRA-7019) Improve tombstone
 compactions
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archived-at: Thu, 23 Jun 2016 19:01:19 -0000


    [ https://issues.apache.org/jira/browse/CASSANDRA-7019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346919#comment-15346919 ] 

Philip Thompson edited comment on CASSANDRA-7019 at 6/23/16 7:01 PM:
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It does appear this needs rebased onto trunk, especially to run dtest, as CCM has the expectation that 3.8+ has CDC. I've attempted to run dtest on this branch with an older CCM to compensate:

http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-dtest/7/

Also linking unit tests:
http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-testall/lastCompletedBuild/testReport/


was (Author: philipthompson):
It does appear this needs rebased onto trunk, especially to run dtest, as CCM has the expectation that 3.8+ has CDC. I've attempted to run dtest on this branch with an older CCM to compensate:

http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-dtest/6/

Also linking unit tests:
http://cassci.datastax.com/view/Dev/view/blambov/job/blambov-7019-rebased-testall/lastCompletedBuild/testReport/

> 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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