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From "Eli Reisman (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-157) Vertex to perform graph coloring on simple, connected, undirected graphs and related test.
Date Sun, 18 Mar 2012 01:40:39 GMT
Vertex to perform graph coloring on simple, connected, undirected graphs and related test.
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                 Key: GIRAPH-157
                 URL: https://issues.apache.org/jira/browse/GIRAPH-157
             Project: Giraph
          Issue Type: Test
          Components: examples, test
    Affects Versions: 0.2.0
            Reporter: Eli Reisman
            Assignee: Eli Reisman
            Priority: Trivial


Hi. I am attempting to learn the Hadoop and Giraph codebases and wanted to write a simple
client application for Giraph to help me learn the ins and outs of it. This is a simple unit
test and vertex modeled after the ConnectedComponentsVertex and related test. The vertex test
runs whenever you run the "mvn test" or "mvn verify" suite of tests. When finished processing,
each vertex will have an integer value that is its color.

This is a pretty simple implementation, and although I have tested it on a number of small
graphs of varied trickiness and it seems to rapidly arrive at a minimal coloring, its hard
(for me at least) to guess which possible coloring it will arrive at and I have no idea how
it will do on really big graphs yet without finding some more pre-colored larger test graphs
to try it on. Ideas anyone?

Anyway, it was fun to put this together, and I'd be happy to improve it or receive some help
or advice to further the cause. Thanks again, I am hoping this will be the first of many (hopefully
more useful) contributions!

Eli

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