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From "Jakob Homan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-64) Create VertexRunner to make it easier to run users' computations
Date Wed, 02 Nov 2011 20:59:32 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-64?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142514#comment-13142514
] 

Jakob Homan commented on GIRAPH-64:
-----------------------------------

bq. Anyone want to take a crack at reviewing this? If not, I'll get to it tomorrow night.
I'll be gone for the next few days, so I'm hoping it can get reviewed and committed.  I think
it's an important step forward.  Once this is in, we generalize the provided examples (pagerank,
shortest path, etc.) to work with any inputformat/outputformat and make Giraph immediately
useful to anyone who downloads it and wants to play with a reasonably stored graph.  

I've verified it still merges cleanly after GIRAPH-36.
                
> Create VertexRunner to make it easier to run users' computations
> ----------------------------------------------------------------
>
>                 Key: GIRAPH-64
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-64
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: GIRAPH-64.patch
>
>
> Currently, if a user wants to implement a Giraph algorithm by extending {{Vertex}} they
must also write all the boilerplate around the {{Tool}} interface and bundle it with the Giraph
jar (or get Giraph on the classpath and playing nice with the implementation).  For example,
what is included in the PageRankBenchmark and what Kohei has done: https://github.com/smly/java-Giraph-LabelPropagation
 It would be better if we had perhaps a Vertex implementation to be subclassed that already
had all the standard Tooling included such that all one had to run would be (assuming the
Giraph jar was already on the classpath):
> {noformat}hadoop jar my-awesome-vertex.jar my.awesome.vertex -i jazz_input -o jazz_output
-if org.apache.giraph.lib.in.text.adjacency-list.LongDoubleDouble -of org.apache.giraph.lib.out.text.adjacency-list.LongDoubleDouble{noformat}
This wouldn't work with every algorithm, but would be useful in a large number of cases.

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