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From "Giraph QA (JIRA)" <>
Subject [jira] [Commented] (GIRAPH-141) multigraph support in giraph
Date Fri, 14 Dec 2012 04:40:19 GMT


Giraph QA commented on GIRAPH-141:

-1 overall.  Here are the results of testing the latest attachment
  against trunk revision 1419623.

    -1 patch.  The patch command could not apply the patch.

Console output:

This message is automatically generated.
> multigraph support in giraph
> ----------------------------
>                 Key: GIRAPH-141
>                 URL:
>             Project: Giraph
>          Issue Type: Improvement
>          Components: graph
>            Reporter: André Kelpe
>            Assignee: Alessandro Presta
>         Attachments: GIRAPH-141.patch, GIRAPH-141.patch, GIRAPH-141.patch
> The current vertex API only supports simple graphs, meaning that there can only ever
be one edge between two vertices. Many graphs like the road network are in fact multigraphs,
where many edges can connect two vertices at the same time.
> Support for this could be added by introducing an Iterator<EdgeWritable> getEdgeValue()
or a similar construct. Maybe introducing a slim object like a Connector between the edge
and the vertex is also a good idea, so that you could do something like:
> {code} 
> for (final Connector<EdgeWritable, VertexWritable> conn: getEdgeValues(){
>      final EdgeWritable edge = conn.getEdge();
>      final VertexWritable otherVertex = conn.getOther();
>      doInterestingStuff(otherVertex);
>      doMoreInterestingStuff(edge);
> }
> {code} 

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