Tsz Wo Nicholas Sze updated HDFS-13227:
       Resolution: Fixed
    Fix Version/s: 3.2.0
           Status: Resolved  (was: Patch Available)

I have committed this.  Thanks, Shashi!

> Add a method to  calculate cumulative diff over multiple snapshots in 
> DirectoryDiffList
> ---------------------------------------------------------------------------------------
>                 Key: HDFS-13227
>                 URL: https://issues.apache.org/jira/browse/HDFS-13227
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: snapshots
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>            Priority: Minor
>             Fix For: 3.2.0
>         Attachments: HDFS-13227.001.patch
> This Jira proposes to add an API in DirectoryWithSnapshotFeature#f 
> DirectoryDiffList which will return minimal list of diffs needed to combine 
> to get the cumulative diff between two given snapshots. The same method will 
> be made use while constructing the childrenList for a directory. 
> DirectoryWithSnapshotFeature#getChildrenList and 
> DirectoryWithSnapshotFeature#computeDiffBetweenSnapshots will make use of the 
> same method to get the cumulative diff. When snapshotSkipList, with minimal 
> set of diffs to combine in order to get the cumulative diff, the overall 
> computation will be faster.

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