[jira] [Commented] (CASSANDRA-10505) Duplicate range tombstones

["Marcus Eriksson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-10505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953209#comment-14953209 ] 

Marcus Eriksson commented on CASSANDRA-10505:
---------------------------------------------

it is likely CASSANDRA-7953 will fix the compaction issue atleast

> Duplicate range tombstones
> --------------------------
>
>                 Key: CASSANDRA-10505
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10505
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Brandon Williams
>             Fix For: 2.1.x
>
>
> I don't have a way to reproduce this just yet, but I have the sstables to prove it and can provide those offline.  What I can reproduce, however, is the magnification of this problem via compaction.  Here's what I know so far:
> * under some condition, we flush the exact same RT more than once in the same sstable.  Same timestamps, everything.
> * Once this happens in multiple sstables, compacting them causes the duplication to grow.  The more this occurs, the worse the problem gets.
> This continues until gc_grace has passed, then they are all evicted normally.  I'd at least like to take a look at the compaction amplification for now, that way if the condition does occur, at least compaction can help it, rather than exacerbate it.



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