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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1910) when dfs.name.dir and dfs.name.edits.dir are same fsimage will be saved twice every time
Date Wed, 28 Dec 2011 18:04:30 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176730#comment-13176730
] 

Aaron T. Myers commented on HDFS-1910:
--------------------------------------

Shouldn't we include a test to ensure this issue doesn't regress?
                
> when dfs.name.dir and dfs.name.edits.dir are same fsimage will be saved twice every time
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-1910
>                 URL: https://issues.apache.org/jira/browse/HDFS-1910
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Gokul
>            Priority: Minor
>              Labels: critical-0.22.0
>         Attachments: saveImageOnce-v0.22.patch
>
>
> when image and edits dir are configured same, the fsimage flushing from memory to disk
will be done twice whenever saveNamespace is done. this may impact the performance of backupnode/snn
where it does a saveNamespace during every checkpointing time.

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