I don't think you have a choice, you'll have to use MapReduce if the data is too big to fit into memory. I believe that's what Facebook and Google do: https:/

I don't think you have a choice, you'll have to use MapReduce if the data is too big to fit into memory. I believe that's what Facebook and Google do: https://www.facebook.com/notes/facebook-engineering/scaling-apache-giraph-to-a-trillion-edges/10151617006153920 https://www.facebook.com/notes/facebook-engineering/scaling-... http://googleresearch.blogspot.com/2009/06/large-scale-graph-computing-at-google.html http://googleresearch.blogspot.com/2009/06/large-scale-graph...