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https://issues.apache.org/jira/browse/HADOOP-4761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652885#action_12652885
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Konstantin Shvachko commented on HADOOP-4761:
---------------------------------------------
# One can have block locations printed by calling
{code}
hadoop fsck /yourDir/yourFile -files -blocks -locations
{code}
# Data-nodes currently have a BlockScanner, which periodically on the
background verifies data-node blocks and reports corrupted ones to the
name-node.
Is that what you need?
It might be useful to add an option to fsck to do a complete file verification
including its replicas on data-nodes by reading them as previously suggested.
> Tool to give the block location and to check if the block at a given datanode
> is corrupt or not
> -----------------------------------------------------------------------------------------------
>
> Key: HADOOP-4761
> URL: https://issues.apache.org/jira/browse/HADOOP-4761
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Ramya R
> Priority: Minor
> Fix For: 0.20.0
>
>
> It would be useful if we could have a command line tool which would list out
> the location of all the replicas of a block given a block-id/filename. Also,
> an utility to check if the block at a given datanode is corrupt or not would
> be of great help in managing the cluster.
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