ILOG CPLEX 11.0 User's Manual > Advanced Programming Techniques > Parallel Optimizers > Using Parallel Optimizers in the Interactive Optimizer |
Using Parallel Optimizers in the Interactive Optimizer |
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In the Interactive Optimizer, ILOG CPLEX invokes parallel optimization by default whenever a deterministic algorithm is available. For mixed integer programming (MIP), this policy means the following sequence of commands invokes parallel deterministic MIP optimization:
cplex
at the operating system prompt.
mipopt
command.The optimizer will use the maximum number of available threads in deterministic mode.
In order to invoke parallel optimization of continuous models in the Interactive Optimizer, you must abandon determinism. You can do so explicitly with the parallel mode parameter, or you can do so implicitly with the threads parameter.
To abandon determinism explicitly by means of the parallel mode parameter, do this:
cplex
at the operating system prompt.
set parallel -1
. The optimizer will use the maximum number of available threads in opportunistic mode.
To abandon determinism implicitly by means of the thread parameter, do this:
cplex
at the operating system prompt.
set threads n
where n is a number strictly greater than 1 (one). The optimizer will use the specified number of threads in opportunistic mode.
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