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Posted to common-dev@hadoop.apache.org by "Arun C Murthy (JIRA)" <ji...@apache.org> on 2007/10/30 06:28:50 UTC
[jira] Created: (HADOOP-2122) Document config parameters for each
Map-Reduce class/interface
Document config parameters for each Map-Reduce class/interface
--------------------------------------------------------------
Key: HADOOP-2122
URL: https://issues.apache.org/jira/browse/HADOOP-2122
Project: Hadoop
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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[jira] Commented: (HADOOP-2122) Document config parameters for each
Map-Reduce class/interface
Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538680 ]
Arun C Murthy commented on HADOOP-2122:
---------------------------------------
Good point!
We should use this jira to add a {{ConfiguredBy}} attribute in any case, even if we can't generate the table for the javadoc.
> Document config parameters for each Map-Reduce class/interface
> --------------------------------------------------------------
>
> Key: HADOOP-2122
> URL: https://issues.apache.org/jira/browse/HADOOP-2122
> Project: Hadoop
> 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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[jira] Commented: (HADOOP-2122) Document config parameters for each
Map-Reduce class/interface
Posted by "Owen O'Malley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538679 ]
Owen O'Malley commented on HADOOP-2122:
---------------------------------------
I'd suggest figuring out if we could use attributes like @ConfiguredBy(...) to generate the table for javadoc.
> Document config parameters for each Map-Reduce class/interface
> --------------------------------------------------------------
>
> Key: HADOOP-2122
> URL: https://issues.apache.org/jira/browse/HADOOP-2122
> Project: Hadoop
> 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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You can reply to this email to add a comment to the issue online.
[jira] Commented: (HADOOP-2122) Document config parameters for each
Map-Reduce class/interface
Posted by "Nigel Daley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538804 ]
Nigel Daley commented on HADOOP-2122:
-------------------------------------
+1 to this Jira. It would be good to include these attributes as well for each parameter:
* the legal values
* the default value if it's unset
* the behaviour if the value is illegal (is the default taken or an exception thrown or ?)
> Document config parameters for each Map-Reduce class/interface
> --------------------------------------------------------------
>
> Key: HADOOP-2122
> URL: https://issues.apache.org/jira/browse/HADOOP-2122
> Project: Hadoop
> 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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