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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 vertex id outboundEdge
[outboundEdge...]END_OF_LINE 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.
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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
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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