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From "Stephen Chu (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-6620) Snapshot docs should specify about preserve options with cp command
Date Wed, 02 Jul 2014 15:44:25 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6620?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Stephen Chu reassigned HDFS-6620:

    Assignee: Stephen Chu

Good idea, I can take this up. Talked to Uma who suggested that we also add a test case for
copying a snapshot file containing xattrs back to the main dfs tree and verifying that the
xattrs are retained.

> Snapshot docs should specify about preserve options with cp command
> -------------------------------------------------------------------
>                 Key: HDFS-6620
>                 URL: https://issues.apache.org/jira/browse/HDFS-6620
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Stephen Chu
> Currently snapshot docs contains the cp command details for copying the snapshot files
to regular dfs tree.
> http://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html#Snapshot_Paths
> Copying a file from snapshot s0:
> hdfs dfs -cp /foo/.snapshot/s0/bar /tmp
> Since there are important properties(acls, xattrs..etc) for a file may need to copy back.
But looking at this doc may mislead to copy with out using any options. So, It may be worth
mentioning aboit that properties. Infact it should copy all properties  by default from snapshot

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