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Date: Fri, 14 Feb 2014 11:53:20 +0000 (UTC)
From: "Liu Shaohui (JIRA)" <jira@apache.org>
To: dev@hbase.apache.org
Message-ID: <JIRA.12695192.1392378772160.42697.1392378800870@arcas>
In-Reply-To: <JIRA.12695192.1392378772160@arcas>
References: <JIRA.12695192.1392378772160@arcas>
Subject: [jira] [Created] (HBASE-10535) Table trash to recover table deleted
 by mistake
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Liu Shaohui created HBASE-10535:
-----------------------------------

             Summary: Table trash to recover table deleted by mistake
                 Key: HBASE-10535
                 URL: https://issues.apache.org/jira/browse/HBASE-10535
             Project: HBase
          Issue Type: Improvement
            Reporter: Liu Shaohui
            Priority: Minor


When table is deleted, only Hfiles are moved to archives dir, table and region infos are deleted immediately. So it's very difficult to recover tables which are deleted by mistakes.

I think if we can introduce an table trash dir in HDFS. When the table is deleted, the entire table dir is moved to trash dir. And after an configurable ttl,  the dir is deleted actually. This can be done by HMaster.

If we want to recover the deleted table, we can use a tool which moves table dir out of trash and recovery the meta data of the table. There are many problems the recover tool will encountered eg, parent  and daughter regions are all in the table dir. But I think this feature is useful to handle some special cases.

Discussions are welcomed.


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