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https://issues.apache.org/jira/browse/HADOOP-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12679065#action_12679065
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Ramya R commented on HADOOP-4763:
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Can we get this feature in, for 0.20?
> Support manually fsck in DataNode
> ---------------------------------
>
> Key: HADOOP-4763
> URL: https://issues.apache.org/jira/browse/HADOOP-4763
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.18.0
> Reporter: Lei Xu
> Fix For: 0.21.0
>
> Attachments: fsck.patch, fsck.patch, HADOOP-4763.patch
>
>
> Now DataNode only support scan all blocks periodically. Our site need a tool
> to check some blocks and files manually.
> My current design is to add a parameter to DFSck to indicate deeply and
> manually fsck request, then let NameNode collect property block identifies
> and sent them to associated DataNode.
> I'll let DataBlockScanner runs in two ways: periodically ( original one ) and
> manually.
> Any suggestions on this are welcome.
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