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Date: Wed, 21 Mar 2012 17:23:39 +0000 (UTC)
From: "Lars Hofhansl (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HBASE-4720) Implement atomic update operations
 (checkAndPut, checkAndDelete) for REST client/server
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     [ https://issues.apache.org/jira/browse/HBASE-4720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Hofhansl updated HBASE-4720:
---------------------------------

    Fix Version/s:     (was: 0.94.0)
                   0.96.0

What is the status of this?
Moving to 0.96 for now. Pull back if you feel that this should go into 0.94.
                
> Implement atomic update operations (checkAndPut, checkAndDelete) for REST client/server 
> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-4720
>                 URL: https://issues.apache.org/jira/browse/HBASE-4720
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Daniel Lord
>            Assignee: Mubarak Seyed
>             Fix For: 0.96.0
>
>         Attachments: HBASE-4720.trunk.v1.patch, HBASE-4720.trunk.v2.patch, HBASE-4720.trunk.v3.patch, HBASE-4720.trunk.v4.patch, HBASE-4720.trunk.v5.patch, HBASE-4720.trunk.v6.patch, HBASE-4720.trunk.v7.patch, HBASE-4720.v1.patch, HBASE-4720.v3.patch
>
>
> I have several large application/HBase clusters where an application node will occasionally need to talk to HBase from a different cluster.  In order to help ensure some of my consistency guarantees I have a sentinel table that is updated atomically as users interact with the system.  This works quite well for the "regular" hbase client but the REST client does not implement the checkAndPut and checkAndDelete operations.  This exposes the application to some race conditions that have to be worked around.  It would be ideal if the same checkAndPut/checkAndDelete operations could be supported by the REST client.

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