hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6793) io.sort.factor code default and mapred-default.xml values inconsistent
Date Thu, 27 Oct 2016 05:52:58 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15610781#comment-15610781
] 

Rohith Sharma K S commented on MAPREDUCE-6793:
----------------------------------------------

I think we should retain the default value as same as current one i.e 100. Changing in code
default value MRJobConfig.DEFAULT_IO_SORT_FACTOR to 10 would reflect job performance which
are using default values.

> io.sort.factor code default and mapred-default.xml values inconsistent
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6793
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6793
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task
>    Affects Versions: 2.6.5, 3.0.0-alpha1
>            Reporter: Gera Shegalov
>            Assignee: Prabhu Joseph
>            Priority: Trivial
>              Labels: noob
>         Attachments: 0001-MAPREDUCE-6793.patch
>
>
> The actual default value in mapred-default.xml:
> {code}
> <property>
>   <name>mapreduce.task.io.sort.factor</name>
>   <value>10</value>
>   <description>The number of streams to merge at once while sorting
>   files.  This determines the number of open file handles.</description>
> </property>
> {code}
> However, MapTask and MergeManagerImpl, are coded with:
> {code}       
>  int mergeFactor = job.getInt(JobContext.IO_SORT_FACTOR, 100);
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: mapreduce-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: mapreduce-issues-help@hadoop.apache.org


Mime
View raw message