Hey guys. . .I have a questions about "dynamic" vertex instantiation vis the sendMsg(. . .) method. I have a job that starts processing on a sequenceFile with only two vertices in it. Each vertex has information in it's value that tells it what vertices are adjacent to it. The primary reason I'm doing this is to avoid loading the entire graph into the job. There are many vertices that won't do any processing (no need to load them). I would like to take my two vertices and "dynamically" build the graph by sending messages. So far, my experimentation shows that this is promising. . .but I have a question WRT load balancing for new vertex instantiation. When I call sendMsg(newVertexID), where will the vertex be instantiated? If I specify 20 mappers (but with only two vertices in my sequence file), obviously there is going to be at least one mapper without a vertex. Is it possible that sendMsg(newVertexID) will be instantiated on an empty mapper? I would like this. . .for load balancing purposes.
-david
