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From "Yuki Morishita (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9900) Anticompaction can mix old and new data with DTCS in 2.2+
Date Wed, 29 Jul 2015 22:22:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14646847#comment-14646847
] 

Yuki Morishita commented on CASSANDRA-9900:
-------------------------------------------

I see your point. +1.
A little comment on DTCS#groupSSTablesForAntiCompaction will help though, like the one in
LCS.

> Anticompaction can mix old and new data with DTCS in 2.2+
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-9900
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9900
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>             Fix For: 2.2.x
>
>         Attachments: 0001-avoid-mixing-new-and-old-data-in-anticompaction-with.patch
>
>
> since CASSANDRA-6851 we group sstables before running anticompaction on them to avoid
increasing sstable count.
> We should not do this for DTCS as it can mix new and old data.



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