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https://issues.apache.org/jira/browse/CASSANDRA-4905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490494#comment-13490494
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Sylvain Lebresne commented on CASSANDRA-4905:
---------------------------------------------
In other words, for existing release, we should probably just do what the title
here suggest. But in the long run (because that require adding a new parameter
to the network protocol, so at best it can be done for 1.2), we should probably
consider having repair agree on a starting timestamp and use that as reference
to expire columns and decide if a tombstone is gcable or not.
> Repair should exclude gcable tombstones from merkle-tree computation
> --------------------------------------------------------------------
>
> Key: CASSANDRA-4905
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4905
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Christian Spriegel
>
> Currently gcable tombstones get repaired if some replicas compacted already,
> but some are not compacted.
> This could be avoided by ignoring all gcable tombstones during merkle tree
> calculation.
> This was discussed with Sylvain on the mailing list:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/repair-compaction-and-tombstone-rows-td7583481.html
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