Originally posted by: Eumpfenbach

Just starting to experiment with using Matlab API in a grid environment. Even when I create a PBS job with 5 nodes and 4 CPUs each (so I was hoping for 20 threads), I see cplex display "using up to 8 threads". I am under the impression that cplex will just use as many threads as possible if I leave it alone. I am using ILOG v12.4.

Testing the number of using the Matlab maxNumCompThreads function in Matlab, I see that Matlab can use 8 threads. This version of Matlab does not have the distributed toolbox. So is Cplex limited by the number of threads available to Matlab? I am not sure if Matlab is playing a part in the solving or just used to get Cplex going and then it gets out of the way. Hope that makes sense.

Thanks.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: Eumpfenbach

Nevermind. This cleared things up. I switched up the cluster I was connecting to to one with 32 cores on a single node. Now Cplex is using 32 cores. Should be plenty. Would be nice if I could use multiple nodes but it is what it is.

http://www-01.ibm.com/support/docview.wss?uid=swg21399972
#CPLEXOptimizers
#DecisionOptimization