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https://issues.apache.org/jira/browse/HDFS-12011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chencan updated HDFS-12011:
---------------------------
    Attachment: HADOOP-12011.002.pathch

> Add a  new load balancing volume choosing policy
> ------------------------------------------------
>
>                 Key: HDFS-12011
>                 URL: https://issues.apache.org/jira/browse/HDFS-12011
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: chencan
>            Assignee: chencan
>         Attachments: HADOOP-12011.002.pathch, HADOOP-12011.patch
>
>
>     There  are two types of volume choosing policies when choose a volume 
> inner a datanode to write in a datablock : RoundRobinVolumeChoosingPolicy and 
> AvailableSpaceVolumeChoosingPolicy.This two policies do not take into account 
> the fsvolume's load. We can add a new load balancing volume choosing policy,  
> using existing reference in FsVolumeImpl.



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