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https://issues.apache.org/jira/browse/HBASE-15321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16334843#comment-16334843
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churro morales commented on HBASE-15321:
----------------------------------------

Applied to master, branch-2 and branch-1, closing this issue.  Thanks for the 
reviews.

> Ability to open a HRegion from hdfs snapshot.
> ---------------------------------------------
>
>                 Key: HBASE-15321
>                 URL: https://issues.apache.org/jira/browse/HBASE-15321
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 2.0.0, 3.0.0, 1.5.0
>            Reporter: churro morales
>            Assignee: churro morales
>            Priority: Major
>         Attachments: HBASE-15321.patch, HBASE-15321.v01.patch, 
> HBASE-15321.v02.patch, HBASE-15321.v1.branch-1.patch
>
>
> Now that hdfs snapshots are here, we started to run our mapreduce jobs over 
> hdfs snapshots.  The thing is, hdfs snapshots are read-only point-in-time 
> copies of the file system.  Thus we had to modify the section of code that 
> initialized the region internals in HRegion.   We have to skip cleanup of 
> certain directories if the HRegion is backed by a hdfs snapshot.  I have a 
> patch for trunk with some basic tests if folks are interested.  



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