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Posted to common-dev@hadoop.apache.org by "Jeff Hammerbacher (JIRA)" <ji...@apache.org> on 2008/10/31 00:14:44 UTC

[jira] Created: (HADOOP-4554) Add a PowerTopology class to aid replica placement and enhance availability of blocks

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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