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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-580) Improve input of graph module
Date Fri, 25 May 2012 13:00:24 GMT

    [ https://issues.apache.org/jira/browse/HAMA-580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283359#comment-13283359
] 

Thomas Jungblut commented on HAMA-580:
--------------------------------------

Just like told somewhere, you're writing the file wrong.

The fixed byte alignment must be like this for SSSP:
VertexID, VertexVALUE -> n times the same.
Text, IntWritable, VertexArrayWritable<Text, IntWritable>

Either fix the mapreduce job accordingly to take the classes or use Pagerank which is:
VertexID, VertexVALUE -> n times quite the same
Text, DoubleWritable -> VertexArrayWritable<Text, NullWritable>

I'm taking a bit off of hama for the next few days, I'd script the proposed Inputformatter
for the user sunday/monday.
                
> Improve input of graph module
> -----------------------------
>
>                 Key: HAMA-580
>                 URL: https://issues.apache.org/jira/browse/HAMA-580
>             Project: Hama
>          Issue Type: Improvement
>          Components: graph
>    Affects Versions: 0.5.0
>            Reporter: Thomas Jungblut
>            Assignee: Thomas Jungblut
>             Fix For: 0.5.0
>
>         Attachments: HAMA-580.patch, HAMA-580_1.patch
>
>
> Currently it is too verbose, the wikipedia dataset is going to be bloated from 0.95gb
to 5gb just because it is writing the classes x-times.

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