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https://issues.apache.org/jira/browse/CASSANDRA-7450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135876#comment-14135876
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Paulo Motta commented on CASSANDRA-7450:
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LGTM, thanks!
> Make repair -pr work within a datacenter
> ----------------------------------------
>
> Key: CASSANDRA-7450
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7450
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Sylvain Lebresne
> Assignee: Paulo Motta
> Labels: bootcamp, repair
> Fix For: 2.1.1
>
> Attachments: 2.1-CASSANDRA-7450-v1.txt, 2.1-CASSANDRA-7450-v2.txt,
> 7450-2.1-v3.txt
>
>
> As was noticed in CASSANDRA-7317, using '-pr' alongside '-local' for repair
> doesn't really work properly, and disabling the combination was definitively
> the right short time fix. However, the main goal of '-pr' is to make it easy
> to repair a full cluster without doing any duplication of work. Doing the
> same only within a data-center is obviously desirable.
> I think a reasonably simple solution would be modify the behavior of '-pr'
> when it's limited to only one DC. If applied to nodeX in dcY, instead of
> repairing only the "primary" range of nodeX for the whole ring, we'll repair
> that range but also all ranges that are "primary" for a node not in dcY and
> for which nodeX is the first node of dcY found in ring order. Basically we'll
> ensure that running 'repair -local -pr' on every nodes of a given DC will
> repair all ranges for the nodes of that DC without repairing the same range
> twice.
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