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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8643) Add snapshot names list to SnapshottableDirectoryStatus
Date Wed, 05 Aug 2015 20:10:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658800#comment-14658800

Jing Zhao commented on HDFS-8643:

Instead of directly adding name list to SnapshottableDirectoryStatus, I think it may be better
to directly enhance the {{lsSnapshottableDir}} cmd by making multiple RPC calls (i.e., do
"ls xxx/.snapshot" for each snapshottable dir). Note that we have RPC packet limitation and
a large number of snapshot list or some long snapshot names can cause issue.

> Add snapshot names list to SnapshottableDirectoryStatus
> -------------------------------------------------------
>                 Key: HDFS-8643
>                 URL: https://issues.apache.org/jira/browse/HDFS-8643
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>         Attachments: HDFS-8643-00.patch, HDFS-8643-01.patch
> The idea of this jira to enhance {{SnapshottableDirectoryStatus}} by adding {{snapshotNames}}
attribute into it, presently it has the {{snapshotNumber}}. IMHO this would help the users
to get the list of snapshot names created. Also, the snapshot names can be used while renaming
or deleting the snapshots.
> {code}
> org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus.java
>   /**
>    * @return Snapshot names for the directory.
>    */
>   public List <String> getSnapshotNames() {
>     return snapshotNames;
>   }
> {code}

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