cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10505) Duplicate range tombstones
Date Mon, 12 Oct 2015 15:23:05 GMT

    [ 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message