[nfcampos]

Fwiw we didn't start with Pregel, but instead reached for it when we saw issues (described elsewhere in this thread) with the previous approach

[rtags]

Thanks, would using a topological sort or other simpler algos, not sufficed processing the graph with cycles directly, may not be as optimised as Pregel, but would have been simpler.

[nfcampos]

A topological sort can't be used for graphs with cycles