Duong created HDDS-9371:
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Summary: OzoneManagerStateMachine deserializes request on the
critical paths
Key: HDDS-9371
URL: https://issues.apache.org/jira/browse/HDDS-9371
Project: Apache Ozone
Issue Type: Improvement
Reporter: Duong
OzoneManagerStateMachine converts Ratis Request to OM request on
[OzoneManagerStateMachine#preAppendTransaction|https://github.com/apache/ozone/blob/master/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerStateMachine.java#L270]
(which is called during appendEntry) and
[OzoneManagerStateMachine#applyTransaction|https://github.com/apache/ozone/blob/master/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerStateMachine.java#L317].
These methods are on the critical paths of Ratis and runs sequentially. This
significantly reduces Ratis replication throughput in OM.
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