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Posted to issues@hbase.apache.org by "Matteo Bertozzi (JIRA)" <ji...@apache.org> on 2013/08/02 18:49:48 UTC
[jira] [Commented] (HBASE-8760) possible loss of data in snapshot
taken after region split
[ https://issues.apache.org/jira/browse/HBASE-8760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13727792#comment-13727792 ]
Matteo Bertozzi commented on HBASE-8760:
----------------------------------------
I'm going to commit my patch, until some one else has a better alternative
> possible loss of data in snapshot taken after region split
> ----------------------------------------------------------
>
> Key: HBASE-8760
> URL: https://issues.apache.org/jira/browse/HBASE-8760
> Project: HBase
> Issue Type: Bug
> Components: snapshots
> Affects Versions: 0.94.8, 0.95.1
> Reporter: Jerry He
> Fix For: 0.98.0, 0.95.2, 0.94.12
>
> Attachments: HBase-8760-0.94.8.patch, HBase-8760-0.94.8-v1.patch, HBASE-8760-thz-v0.patch
>
>
> Right after a region split but before the daughter regions are compacted, we have two daughter regions containing Reference files to the parent hfiles.
> If we take snapshot right at the moment, the snapshot will succeed, but it will only contain the daughter Reference files. Since there is no hold on the parent hfiles, they will be deleted by the HFile Cleaner after they are no longer needed by the daughter regions soon after.
> A minimum we need to do is the keep these parent hfiles from being deleted.
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