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https://issues.apache.org/jira/browse/HADOOP-6467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833521#action_12833521
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Tsz Wo (Nicholas), SZE commented on HADOOP-6467:
------------------------------------------------
The patch improved first part a lot.
[Without the
patch|https://issues.apache.org/jira/browse/HADOOP-6467?focusedCommentId=12830401&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12830401],
it took ~25 mins to show
{noformat}
10/02/06 00:07:17 INFO input.FileInputFormat: Total input paths to process :
100000
{noformat}
With the patch, it only took 14 seconds.
{noformat}
Sun Feb 14 00:18:08 UTC 2010
10/02/14 00:18:22 INFO input.FileInputFormat: Total input paths to process :
100000
{noformat}
> 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.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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