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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4396) sort on 400 nodes is now slower than in 18
Date Tue, 14 Oct 2008 21:39:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639600#action_12639600
] 

Raghu Angadi commented on HADOOP-4396:
--------------------------------------

Thanks Devaraj.

> The entire time duration (~8 minutes) was spent in consuming ~128MB of data from the
dfs [...]

to clarify, are you also saying that this was not the case with 0.18 (i.e. no such anomalies)?

If this is an internal Yahoo machine, you could check if there are simon stats for this. Please
send me the hostname.

> sort on 400 nodes is now slower than in 18
> ------------------------------------------
>
>                 Key: HADOOP-4396
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4396
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.19.0
>            Reporter: Jothi Padmanabhan
>            Assignee: Jothi Padmanabhan
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> Sort on 400 nodes on  hadoop release 18 takes about 29 minutes, but with the 19 branch
takes about 32 minutes. This behavior is consistent.

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