Hi Nick, You are pretty much correct, except that not all vertices need to vote to halt at the same time: some vertices might have voted to halt at a previous superstep and never received any messages after then, in which case they are never reactivated.
In other words, I think you can rephrase that as: 1. All vertices are halted after a given superstep 2. No messages were sent in that superstep Hope it helps. Alessandro From: Nick West <nick.w...@benchmarksolutions.com<mailto:nick.w...@benchmarksolutions.com>> Reply-To: "user@giraph.apache.org<mailto:user@giraph.apache.org>" <user@giraph.apache.org<mailto:user@giraph.apache.org>> Date: Friday, August 3, 2012 2:48 PM To: "user@giraph.apache.org<mailto:user@giraph.apache.org>" <user@giraph.apache.org<mailto:user@giraph.apache.org>> Subject: Termination Conditions Excuse me if this is stated somewhere obvious, but I haven't been unable to find it. What are the exact termination criteria for the global algorithm? Reading the documentation on voteToHalt, looking at the Shortest Path Example code, and looking at the results of my own application, these two conditions must both hold for the global BSP algorithm to terminate: 1) All vertices vote to halt in a given superstep 2) No messages are sent in that supersetp Is that correct? Thanks, Nick West Benchmark Solutions 101 Park Avenue - 7th Floor New York, NY 10178 Tel +1.212.220.4739 | Mobile +1.646.267.4324 www.benchmarksolutions.com <http://www.benchmarksolutions.com/> [cid:image001.png@01CCA50E.43B4A860]
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