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From "Jakob Homan (Updated) (JIRA)" <>
Subject [jira] [Updated] (GIRAPH-64) Create VertexRunner to make it easier to run users' computations
Date Sat, 12 Nov 2011 02:16:52 GMT


Jakob Homan updated GIRAPH-64:

    Attachment: GIRAPH-64-2.patch

Updated patch for Jake's comments.  Outputformat is no longer a required param (though will
open a new JIRA to make it so; defaulting to /dev/null is bad) and inputpath is correctly

Hyunsik: mvn assembly:single (or assembly, but that's been deprecated for single) won't work
since we're defining separate assemblies (either the regular or fat jar), and no default is
provided.  I tried adding one, but it generated basically an empty .tar.gz, which is pretty
useless. It might be better to error out than create an empty file.  This will go away once
we get rid of the fatjar.

Avery: I can't reproduce what you saw and I'm a bit confused because the error is referencing
lines 136-150 in GiraphRunner, but that file is only 117 lines long.  Can you try it again
with this patch on a fresh checkout? 
> Create VertexRunner to make it easier to run users' computations
> ----------------------------------------------------------------
>                 Key: GIRAPH-64
>                 URL:
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: GIRAPH-64-2.patch, 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:
 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 -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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