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Posted to issues@hbase.apache.org by "terry zhang (JIRA)" <ji...@apache.org> on 2013/03/19 04:43:15 UTC
[jira] [Commented] (HBASE-7735) Prevent regions from moving during
online snapshot.
[ https://issues.apache.org/jira/browse/HBASE-7735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13606003#comment-13606003 ]
terry zhang commented on HBASE-7735:
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hi Jonathan， I wonder now how we can make sure all regionserver snapshot manager can get the correct number of region when doing snapshot. Cause if some of the region is moving or spliting , getOnlineRegions will miss these region and snapshot will loss data and there will be hole in meta after we restore snapshot.
> Prevent regions from moving during online snapshot.
> ---------------------------------------------------
>
> Key: HBASE-7735
> URL: https://issues.apache.org/jira/browse/HBASE-7735
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jonathan Hsieh
>
> To increase the probability of snapshots succeeding, we should attempt to prevent splits and region moves from happening. Currently we take region locks but this could be "too late" and results in an aborted snapshot.
> We should probably take the table lock (0.96) when starting a snapshot and for a 0.94 backport we should probably disable the balancer.
> This will probably not be tackled until after trunk merge.
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