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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6467) Performance improvement for liststatus on directories in hadoop archives.
Date Tue, 12 Jan 2010 21:59:54 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12799408#action_12799408
] 

Doug Cutting commented on HADOOP-6467:
--------------------------------------

Might we use Avro for these files?  That way we'll be more easily able to write non-Java archive
readers.

> Performance improvement for liststatus on directories in hadoop archives.
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-6467
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6467
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Mahadev konar
>            Assignee: Mahadev konar
>             Fix For: 0.22.0
>
>         Attachments: Archives_performance.docx
>
>
> A liststatus call on a directory in hadoop archives leads to ( 2* number of files in
directory) open calls to the namenode. This is very sub optimal and needs to be fixed to make
it performant enough to be used on a daily basis. 

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