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From "Jesse Yates (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6205) Support an option to keep data of dropped table for some time
Date Wed, 27 Jun 2012 17:58:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402404#comment-13402404
] 

Jesse Yates commented on HBASE-6205:
------------------------------------

@Lars HBASE-5547 might not fully subsume this - conceptually we could have our own trash directory
that just has a bunch of references files the original HFiles (like what I'm doing with snapshots
in HBASE-6055). You would need to hack Reference.java a little bit to support full file references
(or just use what I wrote: https://github.com/jyates/hbase/blob/timestamp-snapshots-r0/hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java).


This way you don't end up doing any actual file copying, but still can keep track of the files.
                
> 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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