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https://issues.apache.org/jira/browse/HDDS-9371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duong resolved HDDS-9371.
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Resolution: Duplicate
Duplicates HDDS-9369.
> 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
> Priority: Major
>
> 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 run sequentially. This
> significantly reduces Ratis replication throughput in OM.
> All the serialization needs to be done on startTransaction which is called in
> multithreaded context.
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