[jira] Commented: (HADOOP-4404) saveFSImage() should remove files from a storage directory that do not correspond to its type.

["Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639220#action_12639220 ] 

Tsz Wo (Nicholas), SZE commented on HADOOP-4404:
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Is this eligible as a 0.19 blocker?

> saveFSImage() should remove files from a storage directory that do not correspond to its type.
> ----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4404
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4404
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.19.0
>            Reporter: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> NameNode's image and edits directories can be separated (HADOOP-3948).
> So the name-node can have 3 types of storage directories. 
> And each directory should contain only those files that correspond to its type:
> # combined image and edits directory: should contain {{fsimage}} and {{edits}}
> # image only directory should contain only {{fsimage}}
> # edits only directory should contain only {{edits}}

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