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From "Sumadhur Reddy Bolli (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3564) Design enhancements to the pluggable blockplacementpolicy
Date Mon, 17 Sep 2012 18:27:08 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sumadhur Reddy Bolli updated HDFS-3564:
---------------------------------------

    Description: 
Currently, it is assumed that no placement policy other than the default can work with the
balancer and that the minimum racks required for any placement policy is always 2. The attached
pdf suggests enhancements to the existing block placement policy abstraction to enable the
following
a) Let placement policies decide if they are compatible with balancer
b) Provide an api to move blocks that can be used by the balancer for balancing
c) Let the placment policy decide the minimum no of racks give

    
> Design enhancements to the pluggable blockplacementpolicy
> ---------------------------------------------------------
>
>                 Key: HDFS-3564
>                 URL: https://issues.apache.org/jira/browse/HDFS-3564
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: Sumadhur Reddy Bolli
>            Assignee: Sumadhur Reddy Bolli
>             Fix For: 1-win
>
>         Attachments: blockPlacementPolicy enhancements.pdf, policyenhancements-branch-1-win.patch
>
>
> Currently, it is assumed that no placement policy other than the default can work with
the balancer and that the minimum racks required for any placement policy is always 2. The
attached pdf suggests enhancements to the existing block placement policy abstraction to enable
the following
> a) Let placement policies decide if they are compatible with balancer
> b) Provide an api to move blocks that can be used by the balancer for balancing
> c) Let the placment policy decide the minimum no of racks give

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