Shashikant Banerjee updated HDFS-12998:
    Status: Patch Available  (was: Open)

> SnapshotDiff - Provide an iterator-based listing API for calculating 
> snapshotDiff
> ---------------------------------------------------------------------------------
>                 Key: HDFS-12998
>                 URL: https://issues.apache.org/jira/browse/HDFS-12998
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Shashikant Banerjee
>            Assignee: Shashikant Banerjee
>            Priority: Major
>         Attachments: HDFS-12998.001.patch
> Currently , SnapshotDiff computation happens over multiple rpc calls to 
> namenode depending on the no of snapshotDiff entries where each rpc call 
> returns at max 1000 entries by default . Each "getSnapshotDiffreportListing" 
> call to namenode returns a partial snapshotDiffreportList which are all 
> combined and processed at the client side to generate a final 
> snapshotDiffreport. There can be cases where SnapshotDiffReport can be huge 
> and in situations as such , the  rpc calls to namnode should happen on demand 
> at the client side.

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