[jira] [Created] (CASSANDRA-19589) Improve migration to incremental repair

["Jon Haddad (Jira)" <ji...@apache.org>]

Jon Haddad created CASSANDRA-19589:
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             Summary: Improve migration to incremental repair
                 Key: CASSANDRA-19589
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19589
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Jon Haddad


In order to make it easier to migrate from subrange repair to incremental repair, I think we should support an option to repair data already marked as repaired.  

The process would require the user to do the following:

1. A new command to mark all data for a table as repaired, cluster wide.
2. Going forward, the user runs incremental repairs on a regular basis
3. To ensure the data that was written prior to step 1 is consistent, the user would now run subrange repair on *only* the data marked as repaired.  

This would allow the repaired data to remain marked as repaired while also ensuring it's consistent. It also makes it easy for the user to have a regular repair job on the already repaired data to ensure that things are consistent, or after replacing a node from a backup that may have a different set of repaired data from the rest of the cluster.  



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