Benedict Elliott Smith created CASSANDRA-19967:
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Summary: Accord: Refine epoch quorum intersections, sync points,
conflict relations and outcome inference
Key: CASSANDRA-19967
URL: https://issues.apache.org/jira/browse/CASSANDRA-19967
Project: Cassandra
Issue Type: Improvement
Reporter: Benedict Elliott Smith
- ExclusiveSyncPoints must imply global cluster properties, by executing on all
participating epochs so that across all healthy replicas we can know all lower
TxnId are durably applied
- Conflict relations are managed at Token rather than Key level to improve
memory occupancy for workloads with large keys
- Epoch quorum intersections have been updated: preaccept no longer needs to
chase the execution epoch, and recovery now contacts unmigrated epochs for
dependency calculation; fast path decisions only involve the proposal epoch.
This behaviour is now partially configurable.
- Simplifies and fixes the inference of a transaction's outcome when some
shards have truncated the transaction
- Refined internal representations of key ownership across epoch changes
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