Blake Eggleston created CASSANDRA-19920:
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Summary: CEP-15 (C*): Read accord repair cfk keys from sstable
index.
Key: CASSANDRA-19920
URL: https://issues.apache.org/jira/browse/CASSANDRA-19920
Project: Cassandra
Issue Type: Bug
Reporter: Blake Eggleston
In clusters where accord repairs are dealing with a lot of keys, reading the
keys via cql can take up to 90% of cpu time. This patch switches to reading cfk
keys out of the sstable index, which effectively removes that step of accord
repair from the profiler output. Given the structure of the CFK table and how
C* reads compound partition keys with local partitioner, this is a little
involved since we need to properly handle exclusive starts and inclusive ends
without a full partition key.
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