[jira] Commented: (HDFS-786) Implement getContentSummary(..) in HftpFileSystem

["Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837647#action_12837647 ] 

Tsz Wo (Nicholas), SZE commented on HDFS-786:
---------------------------------------------

Oops, I used the new constant value in trunk on the 0.20 patch.  Thanks Suresh for catching this.

> Implement getContentSummary(..) in HftpFileSystem
> -------------------------------------------------
>
>                 Key: HDFS-786
>                 URL: https://issues.apache.org/jira/browse/HDFS-786
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 0.22.0
>
>         Attachments: h786_20091223.patch, h786_20091224.patch, h786_20100104.patch, h786_20100106.patch, h786_20100106_0.20.patch, h786_20100223_0.20.patch
>
>
> HftpFileSystem does not override getContentSummary(..).  As a result, it uses FileSystem's default implementation, which computes content summary on the client side by calling listStatus(..) recursively.  In contrast, DistributedFileSystem has overridden getContentSummary(..) and does the computation on the NameNode.
> As a result, running "fs -dus" on hftp is much slower than running it on hdfs.

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