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From "alan wootton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-50) dfs datanode should store blocks in multiple directories
Date Fri, 26 May 2006 01:37:30 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-50?page=comments#action_12413330 ] 

alan wootton commented on HADOOP-50:
------------------------------------

+1
I didn't look at the patch, but I carefully read the commented out code. I vote yes. (is it
already in? - close this issue).

> dfs datanode should store blocks in multiple directories
> --------------------------------------------------------
>
>          Key: HADOOP-50
>          URL: http://issues.apache.org/jira/browse/HADOOP-50
>      Project: Hadoop
>         Type: Bug

>   Components: dfs
>     Versions: 0.2
>     Reporter: Doug Cutting
>     Assignee: Mike Cafarella
>      Fix For: 0.3
>  Attachments: hadoop.50.patch.1
>
> The datanode currently stores all file blocks in a single directory.  With 32MB blocks
and terabyte filesystems, this will create too many files in a single directory for many filesystems.
 Thus blocks should be stored in multiple directories, perhaps even a shallow hierarchy.

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