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https://issues.apache.org/jira/browse/HADOOP-6433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-6433:
-------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.22.0
     Hadoop Flags: [Reviewed]
           Status: Resolved  (was: Patch Available)

I just committed this. Thanks Zheng. Please see if you can fill up the release 
notes in this JIRA.

> Add AsyncDiskService that is used in both hdfs and mapreduce
> ------------------------------------------------------------
>
>                 Key: HADOOP-6433
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6433
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>             Fix For: 0.22.0
>
>         Attachments: HADOOP-6433.1.patch, HADOOP-6433.2.patch, 
> HADOOP-6433.3.patch
>
>
> Both MAPREDUCE-1213 and HDFS-611 are using a class called AsyncDiskService.
> The idea is to create a thread pool per disk volume, and use that for 
> scheduling async disk operations.

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