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https://issues.apache.org/jira/browse/HADOOP-5693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13177036#comment-13177036
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Iyappan Srinivasan commented on HADOOP-5693:
--------------------------------------------
Im out of office till Jan 1st, 2012. I will check my mails intermittently in
this period.
> The distcp command is working slower in trunk when compared to hadoop-0.18.3
> ----------------------------------------------------------------------------
>
> Key: HADOOP-5693
> URL: https://issues.apache.org/jira/browse/HADOOP-5693
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 0.20.0
> Environment: cluster is brought up with hod in both 0.18.3 and 0.20
> versions
> Reporter: Iyappan Srinivasan
>
> 1st scenario :
> Source cluster (3 slaves) is hadoop-0.18.3 and destination cluster is trunk
> (3 slaves).
> a) The source has 3 files in a directory equaling 0.4 GB
> b) distcp is used to copy these contents to a destination directory.
> (bin/hadoop --config ~/cluster_dir distcp -update -delete
> hftp://<IPFQDN>:<port>//dir1/file1 hdfs://<IPFQDN:PORT>//copied/)
> c) It takes 34 seconds
> 2nd scenario :
> Source cluster is trunk. and destination cluster (3 slaves) is hadoop-0.18.3
> a) The source has 3 files in a directory equaling 0.4 GB
> b) distcp is used to copy these contents to a destination directory.
> c) It takes 19 seconds
> From this we can conclude, In the latest trunk, distcp has considerabley
> slowed down ( around 78%).
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