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From "Jeff Hammerbacher (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4554) Add a PowerTopology class to aid replica placement and enhance availability of blocks
Date Thu, 30 Oct 2008 23:14:44 GMT
Add a PowerTopology class to aid replica placement and enhance availability of blocks 
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                 Key: HADOOP-4554
                 URL: https://issues.apache.org/jira/browse/HADOOP-4554
             Project: Hadoop Core
          Issue Type: New Feature
            Reporter: Jeff Hammerbacher
            Priority: Minor


Power outages are a common reason for a DataNode to become unavailable. Having a data structure
to represent to the power topology of your data center can be used to implement a power-aware
replica placement policy.

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