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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1918) Add documentation to Rumen
Date Fri, 03 Sep 2010 18:17:33 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12905998#action_12905998
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Hong Tang commented on MAPREDUCE-1918:
--------------------------------------

A few minor nits:
* "Incase" => "in case"
* For TraceBuilder, does it descend recursively into the input foloder, or do we need to specify
the immediate parent directory that contains the files? 
* Can we add a bit more details on "demuxer"? How about the following?
bq. Demuxer decides how the input file maps to jobhistory file(s). [insert]Job history logs
and job conf files are typically small files, and can be more effectively stored if we embed
them in some container file format like SequenceFile or TFile. To support such usage cases,
one can specify a customized Demuxer class that can extract individual job history logs and
job conf files from source files. [/insert]
* There is no need to do canParse() check if you know which parser to use (hence no need to
use ris). The parser will (or should) simply abort if the source is not of the expected version.
* VersionDetector seems rather internal, getParser() is probably what users should care about.



> Add documentation to Rumen
> --------------------------
>
>                 Key: MAPREDUCE-1918
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1918
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: tools/rumen
>    Affects Versions: 0.22.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>             Fix For: 0.22.0
>
>         Attachments: mapreduce-1918-v1.3.patch, mapreduce-1918-v1.4.patch, mapreduce-1918-v1.7.patch,
rumen.pdf, rumen.pdf
>
>
> Add forrest documentation to Rumen tool.

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