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Posted to common-issues@hadoop.apache.org by "Mahadev konar (JIRA)" <ji...@apache.org> on 2009/12/23 23:51:29 UTC

[jira] Updated: (HADOOP-6467) Performance improvement for liststatus on directories in hadoop archives.

     [ https://issues.apache.org/jira/browse/HADOOP-6467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mahadev konar updated HADOOP-6467:
----------------------------------

    Attachment: Archives_performance.docx

attached document on how archives is implemented currently and what improvements need to be made. please take a look. Feedback is welcome.

> 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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