hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Scott Chen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-2340) optimize JobInProgress.initTasks()
Date Mon, 07 Mar 2011 23:04:59 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Scott Chen updated MAPREDUCE-2340:
----------------------------------

    Status: Patch Available  (was: Open)

> optimize JobInProgress.initTasks()
> ----------------------------------
>
>                 Key: MAPREDUCE-2340
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2340
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>    Affects Versions: 0.21.0, 0.20.1
>            Reporter: Kang Xiao
>         Attachments: MAPREDUCE-2340.patch, MAPREDUCE-2340.patch
>
>
> JobTracker's hostnameToNodeMap cache can speed up JobInProgress.initTasks() and JobInProgress.createCache()
significantly. A test for 1 job with 100000 maps on a 2400 cluster shows nearly 10 and 50
times speed up for initTasks() and createCache(). 

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message