Gianmarco De Francisci Morales created GIRAPH-191:

             Summary: Random Walk with Restart
                 Key: GIRAPH-191
             Project: Giraph
          Issue Type: New Feature
            Reporter: Gianmarco De Francisci Morales

Implementing RWR on Giraph should be a very simple modification of the 
SimplePageRankVertex code.

if ( myID == sourceID )
      DoubleWritable vertexValue = new DoubleWritable((0.15f + 0.85f * sum);
      DoubleWritable vertexValue = new DoubleWritable(0.85f * sum);

It would be nice to make it as configurable as possible by using parametric 
damping factors, preference vectors, strongly preferential, etc...
More or less along these lines:

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