Jonathan Ellis created CASSANDRA-5351:
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Summary: 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
Fix For: 2.0
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.
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.
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