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Posted to common-dev@hadoop.apache.org by "Jothi Padmanabhan (JIRA)" <ji...@apache.org> on 2008/10/11 18:25:44 UTC
[jira] Commented: (HADOOP-4396) sort on 400 nodes is now slower
than in 18
[ https://issues.apache.org/jira/browse/HADOOP-4396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638767#action_12638767 ]
Jothi Padmanabhan commented on HADOOP-4396:
-------------------------------------------
The patch responsible for this regression has been identified as HADOOP-3514. HADOOP-3514 uses the RawLocalFileSystem (as opposed to LocalFileSystem) for creating and opening Intermediate Files and a buffering issue there is a likely cause for this
> 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
> 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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