[jira] [Updated] (HBASE-15321) Ability to open a HRegion from hdfs snapshot.

["churro morales (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-15321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

churro morales updated HBASE-15321:
-----------------------------------
    Attachment: HBASE-15321.patch

Here is the patch for master.

> 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
>            Reporter: churro morales
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15321.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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