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https://issues.apache.org/jira/browse/GIRAPH-157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Reisman updated GIRAPH-157:
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Attachment: GIRAPH-157-2.patch
This is an update to fix the initialization issue that IntIntNullIntVertex had
(see GIRAPH-161) and that therefore my variation IntIntNullTextVertex carried
with regard to possible null initialization of edges and messages. See
GIRAPH-161 for details. I'm still looking for larger undirected, connected,
simple graphs in line input format like
[outboundEdge...] that we know the correct chromatic number of to
test this thing on larger input graphs. So far, every graph I test it with is
given a correct minimal coloring. Lets break this thing, anyone?
> Vertex to perform graph coloring on simple, connected, undirected graphs and
> related test.
> --
>
> 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
> Labels: newbie
> Attachments: GIRAPH-157-2.patch, GIRAPH-157.patch
>
>
> 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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