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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-909) dfs "du" shows that the size of a subdirectory is 0
Date Tue, 23 Jan 2007 01:35:49 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-909?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HADOOP-909:
---------------------------------

    Attachment: du.patch

> dfs "du" shows that the size of a subdirectory is 0
> ---------------------------------------------------
>
>                 Key: HADOOP-909
>                 URL: https://issues.apache.org/jira/browse/HADOOP-909
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.10.1
>            Reporter: Hairong Kuang
>         Assigned To: Hairong Kuang
>         Attachments: du.patch
>
>
> dfs "du" is implemented by sending a listPaths request to the namenode to get the size
of each file/subdir under the directory. At the namenode side, the size of subdir was calculated
by recursively going through the whole subtree with the subdir as the root. But starting from
the release 0.10.0, the size of subdir is no longer gets calculated. So dfs "du" shows its
size as 0.
> The problem is that both "du" and "list" send the same request "listPaths" to the  namenode.
The previous implmentation made list very expensive, but the current implementation makes
du not working.

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