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https://issues.apache.org/jira/browse/HADOOP-6467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mahadev konar updated HADOOP-6467:
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Attachment: HADOOP-6467.patch
can you try this patch out nicholas? The file split generation was taking a lot
of time, i made it to return fake blocks to make it faster. The only
implication of this change is that the map reduce tasks might run on non local
machines, which I dont think should be a lot of performance impact since it
anway accesses multiple files (index and parts) which cannot be on the same
host.
> 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, 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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