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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 22:03:32 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-64?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142608#comment-13142608
] 

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

Not that I know of.  I'm allergic to rb, but I've never seen one.  In Hive land we have to
manually create an instance for each issue.  I just tried to create one for this and, while
Giraph exists as a target, I get a 500 exception ("something broke!" - gee, that's helpful).
                
> 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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