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https://issues.apache.org/jira/browse/HDDS-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16786376#comment-16786376
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Hudson commented on HDDS-1175:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16149 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16149/])
HDDS-1175. Serve read requests directly from RocksDB. (#557) (github: rev
bb12e81ec84e2a2a1154b756d05336018c70f946)
* (delete)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OMRatisHelper.java
* (edit)
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOzoneManagerHA.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerStateMachine.java
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/protocolPB/OzoneManagerProtocolClientSideTranslatorPB.java
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/ha/OMFailoverProxyProvider.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/protocolPB/OzoneManagerProtocolServerSideTranslatorPB.java
* (edit) hadoop-hdds/common/src/main/resources/ozone-default.xml
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/OMConfigKeys.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerRatisClient.java
* (add)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/helpers/OMRatisHelper.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerRatisServer.java
* (add)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/exceptions/NotLeaderException.java
> Serve read requests directly from RocksDB
> -----------------------------------------
>
> Key: HDDS-1175
> URL: https://issues.apache.org/jira/browse/HDDS-1175
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: Ozone Manager
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Labels: pull-request-available
> Attachments: HDDS-1175.001.patch
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> We can directly server read requests from the OM's RocksDB instead of going
> through the Ratis server. OM should first check its role and only if it is
> the leader can it server read requests.
> There can be a scenario where an OM can lose its Leader status but not know
> about the new election in the ring. This OM could server stale reads for the
> duration of the heartbeat timeout but this should be acceptable (similar to
> how Standby Namenode could possibly server stale reads till it figures out
> the new status).
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