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Posted to commits@cassandra.apache.org by "Benedict (JIRA)" <ji...@apache.org> on 2018/09/12 14:12:00 UTC
[jira] [Created] (CASSANDRA-14723) Increase write availability
during range movements
Benedict created CASSANDRA-14723:
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Summary: Increase write availability during range movements
Key: CASSANDRA-14723
URL: https://issues.apache.org/jira/browse/CASSANDRA-14723
Project: Cassandra
Issue Type: Improvement
Reporter: Benedict
Fix For: 4.x
If pending ranges were to be paired with their ‘natural’ replicas, instead of requiring QUORUM+#pending, we could instead require QUORUM, but count both owners of the pending range as a combined 1 - where they are only counted if both return success.
As an example, in a cluster with RF=3, a pending range movement would currently require 3 nodes to respond, so must include at least one of the pending nodes. Under the proposed scheme, the 2 non-participating nodes could respond as normal to reach a QUORUM, not requiring either of the pending nodes to respond.
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