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https://issues.apache.org/jira/browse/HBASE-6205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400738#comment-13400738
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Zhihong Ted Yu commented on HBASE-6205:
---------------------------------------
>From
>http://www.oracle.com/technetwork/database/features/availability/flashback-overview-082751.html
> (Jon Hsieh referred to):
Flashback Drop: recover an accidentally dropped table. It restores the dropped
table, and all of its indexes, constraints, and triggers, from the Recycle Bin
(a logical container of all dropped objects).
> Support an option to keep data of dropped table for some time
> -------------------------------------------------------------
>
> Key: HBASE-6205
> URL: https://issues.apache.org/jira/browse/HBASE-6205
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.94.0, 0.96.0
> Reporter: chunhui shen
> Assignee: chunhui shen
> Fix For: 0.96.0
>
> Attachments: HBASE-6205.patch, HBASE-6205v2.patch,
> HBASE-6205v3.patch, HBASE-6205v4.patch, HBASE-6205v5.patch
>
>
> User may drop table accidentally because of error code or other uncertain
> reasons.
> Unfortunately, it happens in our environment because one user make a mistake
> between production cluster and testing cluster.
> So, I just give a suggestion, do we need to support an option to keep data of
> dropped table for some time, e.g. 1 day
> In the patch:
> We make a new dir named .trashtables in the rood dir.
> In the DeleteTableHandler, we move files in dropped table's dir to trash
> table dir instead of deleting them directly.
> And Create new class TrashCleaner which will clean dropped tables if it is
> time out with a period check.
> Default keep time for dropped tables is 1 day, and check period is 1 hour.
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