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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6467) Performance improvement for liststatus on directories in hadoop archives.
Date Tue, 23 Feb 2010 00:47:30 GMT

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

Mahadev konar updated HADOOP-6467:

    Attachment: HADOOP-6467-y.0.20-branch-v2.patch

this patch has minor fixes to it
- changed Path for every index entry to be only created if the prefix matching happens
- changed depth of harPath to be calculated once
- changed formatting to fit 80 characters

> 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, Archives_performance.docx, HADOOP-6467-v2.patch,
HADOOP-6467-y.0.20-branch-v2.patch, HADOOP-6467-y.0.20-branch-v2.patch, HADOOP-6467-y0.20-branch.patch,
HADOOP-6467.patch, HADOOP-6467.patch, HADOOP-6467.patch
> 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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