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From "David Ciemiewicz (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2122) Document config parameters for each Map-Reduce class/interface
Date Sun, 22 Nov 2009 23:39:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781253#action_12781253

David Ciemiewicz commented on HADOOP-2122:

Did this ever get documented?
Is there a pointer to where these config params are documented?
It seems like this would have been addressed after 2 years but I can't find any such table
for options such as fs.inmemory.size.mb

> Document config parameters for each Map-Reduce class/interface
> --------------------------------------------------------------
>                 Key: HADOOP-2122
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2122
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: documentation
>            Reporter: Arun C Murthy
> I propose we add a table in the javadoc for each user-facing Map-Reduce interface/class
which lists, and provides details, of each and every config parameter which has any bearing
on that interface/class. Clearly some parameters affect more than one place and they should
be put in more than one table.
> For e.g. 
> Mapper -> io.sort.mb, io.sort.factor
> Reducer -> fs.inmemory.size.mb
> ...
> etc.
> It would very nice to explain how it interacts with the framework and rest of config
params etc.
> Thoughts?

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