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https://issues.apache.org/jira/browse/HDFS-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14296925#comment-14296925
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Rakesh R commented on HDFS-7648:
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Thanks [~cmccabe] for comments.
bq.Probably what we want to do is log a warning about files that are in
locations they do not belong in
Do you meant, DirectoryScanner should identify the blocks which are not in the
expected directory path computed using its block ID and just do a log message
without fixing it. As per the earlier discussion it need to fix. I was having
an idea which is similar to the mechanism used in Datastorage, create
hardlinks. Please correct me if I miss anything.
> Verify the datanode directory layout
> ------------------------------------
>
> Key: HDFS-7648
> URL: https://issues.apache.org/jira/browse/HDFS-7648
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Tsz Wo Nicholas Sze
>
> HDFS-6482 changed datanode layout to use block ID to determine the directory
> to store the block. We should have some mechanism to verify it. Either
> DirectoryScanner or block report generation could do the check.
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