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https://issues.apache.org/jira/browse/HDFS-4977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707231#comment-13707231
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Shinichi Yamashita commented on HDFS-4977:
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Thank you for comment.
The user of Hadoop 2.0 (Apache, HDP 2.0, CDH4) may use SecondaryNameNode 
depending on requirements.And they watch web ui for monitoring and management 
if they use SecondaryNameNode.
They will be wrong when a checkpoint is carried out at size of edits like 
Hadoop 1.0.
                
> Change "Checkpoint Size" of web ui of SecondaryNameNode
> -------------------------------------------------------
>
>                 Key: HDFS-4977
>                 URL: https://issues.apache.org/jira/browse/HDFS-4977
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0, 2.0.4-alpha
>            Reporter: Shinichi Yamashita
>            Priority: Minor
>              Labels: newbie
>         Attachments: HDFS-4977-2.patch, HDFS-4977.patch, HDFS-4977.patch
>
>
> The checkpoint of SecondaryNameNode after 2.0 is carried out by 
> "dfs.namenode.checkpoint.period" and "dfs.namenode.checkpoint.txns".
> Because "Checkpoint Size" displayed in status.jsp of SecondaryNameNode, it 
> shuold make modifications.

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