Hi Claudio,

  So what you want is to be able to build up your own application-specific data structure for the outbound edges of a vertex (in your case, one that effectively supports fulltext search on the edge values)?

  Check out: https://issues.apache.org/jira/browse/GIRAPH-31 - this change, if merged to trunk, would allow you to keep whatever edge datastructure you wanted, and implement your own internal structures.  Try out that patch, give a comment on the JIRA if you've got any thoughts!


On Tue, Sep 13, 2011 at 3:09 AM, Claudio Martella <claudio.martella@gmail.com> wrote:
Hello list,

I'm currently implementing large scale path traversals over an RDF graph. the traversals are defined by the starting vertex and a set of edge labels that have to be traversed, if possible, to obtain all the wanted paths. In my current scenario the vertexID is Text, and the Edge is <Text, Text> as well, as the edge value is the edge label. For obvious reasons, it would be much more efficient to be able to obtain all the edges with a matching Edge label (value), without iterating through the whole vertex edge list looking for them (given avg vertex degree of K i'd go from O(K) to O(logK) at least). I thought about creating my own labelledOutEdgeMap and populate it by overriding Vertex.addEdge(), but that's final. I thought about adding a method but VertexReader.next() is receiving a MutableVertex.

Do you have any suggestions?


    Claudio Martella