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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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Tsz Wo (Nicholas), SZE updated HADOOP-6467:
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Component/s: fs
Hadoop Flags: [Reviewed]
+1 Got some better numbers. The v3 patch is good to go.
{noformat}
"-bash-3.1$ date; time $H ${WC_CMD} ${HAR_FULL}/${DIR} ${TT_WC}4
Tue Feb 23 02:17:18 UTC 2010
10/02/23 02:17:32 INFO input.FileInputFormat: Total input paths to process :
100000
10/02/23 02:27:39 INFO mapred.JobClient: Running job: job_201002042035_76681
10/02/23 02:27:40 INFO mapred.JobClient: map 0% reduce 0%
...
10/02/23 02:32:35 INFO mapred.JobClient: map 100% reduce 100%
10/02/23 02:32:41 INFO mapred.JobClient: Job complete: job_201002042035_76681
...
10/02/23 02:32:42 INFO mapred.JobClient: Reduce input records=15660
real 15m23.717s
user 2m22.153s
sys 0m39.487s
{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
> Components: fs
> 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, HADOOP-6467_v3.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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