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Jonathan Ellis edited comment on CASSANDRA-5351 at 7/16/13 7:37 PM: -------------------------------------------------------------------- Right. More precisely, the idea is to build a merkle tree only for new-since-last-repair data. was (Author: jbellis): Right. More precisely, the idea is to reconstruct the merkle tree only for new-since-last-repair data. > Avoid repairing already-repaired data by default > ------------------------------------------------ > > Key: CASSANDRA-5351 > URL: https://issues.apache.org/jira/browse/CASSANDRA-5351 > Project: Cassandra > Issue Type: Task > Components: Core > Reporter: Jonathan Ellis > Labels: repair > Fix For: 2.1 > > > Repair has always built its merkle tree from all the data in a columnfamily, > which is guaranteed to work but is inefficient. > We can improve this by remembering which sstables have already been > successfully repaired, and only repairing sstables new since the last repair. > (This automatically makes CASSANDRA-3362 much less of a problem too.) > The tricky part is, compaction will (if not taught otherwise) mix repaired > data together with non-repaired. So we should segregate unrepaired sstables > from the repaired ones. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira