read repair on quorum consistencylevel
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Key: CASSANDRA-982
URL: https://issues.apache.org/jira/browse/CASSANDRA-982
Project: Cassandra
Issue Type: New Feature
Components: Core
Reporter: Jonathan Ellis
Priority: Minor
Fix For: 0.7
CASSANDRA-930 made read repair "fuzzy optional," but this only helps with
ConsistencyLevel.ONE:
- Quorum reads always send requests to all nodes
- only the first Quorum's worth of responses get compared
So what we'd like to do two changes:
- only send read requests to the closest R live nodes
- if read repair is enabled, also compare results from the other nodes in the
background
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