Paulo Motta created CASSANDRA-21169:
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Summary: Allow overriding compaction strategy parameters during
startup
Key: CASSANDRA-21169
URL: https://issues.apache.org/jira/browse/CASSANDRA-21169
Project: Apache Cassandra
Issue Type: Improvement
Reporter: Paulo Motta
One strategy to perform large scale compaction strategy changes is to perform
the change on a per-node, per-rack or per-dc basis via JMX to control the
impact in the cluster.
However if nodes that have change their compaction via JMX are restarted before
the schema is updated, the old compaction parameters are restored from the
schema causing lost work.
This ticket is to add a new configuration to override parameters of specific
table or keyspacesat startup via the following JVM properties:
- cassandra.override_compaction.entities: comma-separated list of keyspaces
and keyspace.table pairs (e.g. "ks1,ks2.tbl1,ks3.tbl2")
- cassandra.override_compaction.params: JSON compaction parameters to apply
When these properties are set, the schema parameters are ignored and these are
used instead for the specified entities.
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