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https://issues.apache.org/jira/browse/CASSANDRA-12701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568894#comment-15568894
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Jeremiah Jordan commented on CASSANDRA-12701:
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For the upgrade scenario users will need to update the settings themselves,
which they can already do. Because of the fact that users could have already
made similar changes to these tables we can't modify them ourselves during an
update.
We probably need a NEWS.txt entry here recommending people to do that, and also
that they may want to delete the old data from the table before the TTL was
applied, though there isn't really a good way to do that :/.
> Repair history tables should have TTL and TWCS
> ----------------------------------------------
>
> Key: CASSANDRA-12701
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12701
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Chris Lohfink
> Labels: lhf
> Attachments: CASSANDRA-12701.txt
>
>
> Some tools schedule a lot of small subrange repairs which can lead to a lot
> of repairs constantly being run. These partitions can grow pretty big in
> theory. I dont think much reads from them which might help but its still
> kinda wasted disk space. I think a month TTL (longer than gc grace) and maybe
> a 1 day twcs window makes sense to me.
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