"safe mode" for nodes so that they do not participate in reads until hinted
handoff is complete
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Key: CASSANDRA-768
URL: https://issues.apache.org/jira/browse/CASSANDRA-768
Project: Cassandra
Issue Type: New Feature
Components: Core
Reporter: Robert Coli
Priority: Minor
Summary :
When using ConsistencyLevel.ONE for read performance reasons, stale data can be
served by a node which has been temporarily unavailable. When a node has been
unavailable for some time and other nodes have queued updates for it via hinted
handoff, it would be operationally useful to be able to configure the node to
not participate in read traffic until the hinted handoff process is complete. A
"safe mode" would offer operators a greater consistency guarantee across all
nodes without the per-read performance tradeoff of a higher ConsistencyLevel.
This "safe mode" concept might also be applicable to nodes undergoing "repair"
processes, for example in the case of on-disk data corruption or loss.
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