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https://issues.apache.org/jira/browse/HDFS-6066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13923672#comment-13923672
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Uma Maheswara Rao G commented on HDFS-6066:
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I remember we done this change part of HA to sync the blocks with standby. Do 
you consider HA NN scenario for this?

> logGenerationStamp is not needed to reduce editlog size
> -------------------------------------------------------
>
>                 Key: HDFS-6066
>                 URL: https://issues.apache.org/jira/browse/HDFS-6066
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: chenping
>            Priority: Minor
>             Fix For: 3.0.0
>
>         Attachments: HDFS-6066-trunk.patch
>
>
> almost every logGenerationStamp has a logAddBlock followed, so we can get the 
> newest gs from the logAddBlock operation indirectly.this will reduce the edit 
> log size.



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