In Cassandra, Hinted Handoff(HH) only happens when consistency level can be met. Also, hints are unreadable to clients. With consistency level > ANY, using HH can improve neither write nor read availability. Requests still fail since the online replicas are insufficient to meet consistency requirements.
What's the point of using Hinted Handoff? Trading capacity for performance?
Why not just synchronize the failed-and-back node with other replica nodes (i.e. re-replication)?
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Is Hinted Handoff a better choice than Re-replication for consistency>ANY?
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