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From "Tsz Wo (Nicholas), SZE (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1120) Make DataNode's block-to-device placement policy pluggable
Date Wed, 08 Feb 2012 23:15:02 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204098#comment-13204098
] 

Tsz Wo (Nicholas), SZE commented on HDFS-1120:
----------------------------------------------

Similar to BlockPlacementPolicy, BlockVolumeChoosingPolicy actually is better annotated as
@InterfaceAudience.Private.  Harsh, how does it sound to you?
                
> Make DataNode's block-to-device placement policy pluggable
> ----------------------------------------------------------
>
>                 Key: HDFS-1120
>                 URL: https://issues.apache.org/jira/browse/HDFS-1120
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>            Reporter: Jeff Hammerbacher
>            Assignee: Harsh J
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1120.r1.diff, HDFS-1120.r2.diff, HDFS-1120.r3.diff, HDFS-1120.r4.diff
>
>
> As discussed on the mailing list, as the number of disk drives per server increases,
it would be useful to allow the DataNode's policy for new block placement to grow in sophistication
from the current round-robin strategy.

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