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https://issues.apache.org/jira/browse/HDFS-13053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16344044#comment-16344044
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Íñigo Goiri commented on HDFS-13053:
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[~hanishakoneru] we can make this backward compatible.
Repeated can be optional, the approach in [^HDFS-13053.000.patch] should be
backwards compatible:
* If an old client gets a message with the times, that part is ignored;
protobuf supports this (I've tested this and I believe [~asuresh] mentioned
this some time ago).
* If a new client gets a message without the times, the code already checks
that.
> Track time to process packet in Datanode
> ----------------------------------------
>
> Key: HDFS-13053
> URL: https://issues.apache.org/jira/browse/HDFS-13053
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Íñigo Goiri
> Assignee: Pulkit Misra
> Priority: Minor
> Attachments: HDFS-13053.000.patch
>
>
> We should track the time that each datanode takes to process a packet.
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