ILOG CPLEX 11.0 User's Manual

Table 1.2 Optimizer Options in IloCplex::AlgorithmIloCplex::AutoAlgIloCplex::PrimalIloCplex::DualIloCplex::NetworkIloCplex::BarrierIloCplex::SiftingIloCplex::Concurrentlet CPLEX decide which algorithm to useuse the primal simplex algorithmuse the dual simplex algorithmuse the primal network simplex algorithm on an embeddednetwork followed by the dual simplex algorithm for LPs andthe primal simplex algorithm for QPs on the entire problemuse the barrier algorithm. The type of crossover performedafter the barrier algorithm is set by the parameterIloCplex::BarCrossAlg.use the sifting algorithmuse multiple algorithms concurrently on a multiprocessorsystemTable 1.3 Algorithm Available at Root by Problem TypeValueAlgorithm TypeLP?MILP?QP?MIQP?QCP?MIQCP?0 IloCplex::AutoAlg yes yes yes1 IloCplex::Primal yes yes not available2 IloCplex::Dual yes yes not available3 IloCplex::Network yes yes not available4 IloCplex::Barrier yes yes yes5 IloCplex::Sifting yes not available not available6 IloCplex::Concurrent yes yes not availableIf the extracted model requires the solution of more than one continuous relaxation, thealgorithm for solving the first one at the root is controlled by the RootAlg parameter. Thealgorithm at all other nodes except the root is controlled by the NodeAlg parameter:cplex.setParam(IloCplex::NodeAlg, alg).54 ILOG CPLEX 11.0 — USER’ S MANUAL