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From "Harold Lim (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1451) Extend the pluggable block placement policy interface to handle/allow file-level intelligence
Date Wed, 20 Oct 2010 20:16:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12923147#action_12923147
] 

Harold Lim commented on HDFS-1451:
----------------------------------

That can work but it's not a "clean" solution. It restricts how filenames/paths are named.

> Extend the pluggable block placement policy interface to handle/allow file-level intelligence
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1451
>                 URL: https://issues.apache.org/jira/browse/HDFS-1451
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: Harold Lim
>
> The current pluggable block placement policy interface (https://issues.apache.org/jira/browse/HDFS-385)
sets the policy globally. I propose to have this interface be extended to allow setting the
policy on a file-level basis. For example, there may be cases where certain files may simply
need the default policy and certain other files need more complex block placement policies.


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