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https://issues.apache.org/jira/browse/HBASE-6205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401193#comment-13401193
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chunhui shen commented on HBASE-6205:
-------------------------------------
1.Trash facility of hdfs is only used for shell command, if we called
fs.delete() through code, it won't work, correct me if wrong
2.Deleting HFiles when in "backup mode" will reserver all the compacted old
files, but we won't need so more in general time
3.Should we start "backup mode" actively? If so, how do we ensure reserve
dropped table's files if we don't start "backup mode".
4.We shouldn't depend on that developer won't make mistake, HBase Administrator
need one solution to recover dropped table's data.
5.This featue is configurable, we could close it if no necessary
The above is why we suggest this feature,
Pardon me if wrong.
Thanks all for providing suggestion.
> 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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