amplab/graphx — pull request #84 by amatsukawa (2013-12-05 02:23:31+00:00)
Title: GraphLab bug fix & set start vertex

Two changes to GraphLab

1. Fixed a bug where if a vertex has 0 vertices that scatter to it, it stays active forever.
2. Add ability to set starting vertices using a predicate, with default being all vertices are active.

For 2 above, debated if we should allow the predicate to operate over edges (essentially starting with a scatter phase), but stuck with the simpler one for now.