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Posted to hdfs-dev@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/21 18:42:39 UTC

[jira] [Resolved] (HDFS-867) Add a PowerTopology class to aid replica placement and enhance availability of blocks

     [ https://issues.apache.org/jira/browse/HDFS-867?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved HDFS-867.
-----------------------------------

    Resolution: Fixed

I'm going to close this as fixed:  using either a multi-level topology or just within the network topology, one can build the power topology into the system. (And, in practice, this is what many of us do...)

> Add a PowerTopology class to aid replica placement and enhance availability of blocks 
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-867
>                 URL: https://issues.apache.org/jira/browse/HDFS-867
>             Project: Hadoop HDFS
>          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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