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From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5568) Support inclusion of snapshot paths in Namenode fsck
Date Wed, 27 Nov 2013 01:06:36 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13833299#comment-13833299
] 

Vinay commented on HDFS-5568:
-----------------------------

bq. One comment is the following code cannot cover the case that the initial given path for
fsck is under a snapshottable directory.
Yes. -includeSnapshots is to include the ".snapshot" directory and its tree if the path is
a snapshottable directory. Not to find out the corresponding snapshot path of directory/files
under a snapshottable directory and include them in fsck report. If the path is not exactly
a snapshottable directory or a parent of it, then fsck will not include any ".snapshot" paths
in it.

> Support inclusion of snapshot paths in Namenode fsck
> ----------------------------------------------------
>
>                 Key: HDFS-5568
>                 URL: https://issues.apache.org/jira/browse/HDFS-5568
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: snapshots
>            Reporter: Vinay
>            Assignee: Vinay
>         Attachments: HDFS-5568-1.patch, HDFS-5568.patch, HDFS-5568.patch
>
>
> Support Fsck to check the snapshot paths also for inconsistency.
> Currently Fsck supports snapshot paths if path given explicitly refers to a snapshot
path.
> We have seen safemode problems in our clusters which were due to blocks missing which
were only present inside snapshots. But "hdfs fsck /" shows HEALTHY. 
> So supporting snapshot paths also during fsck (may be by default or on demand) would
be helpful in these cases instead of specifying each and every snapshottable directory.



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