ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Barrier algorithm

C Name

CPX_PARAM_BARALG

C++ Name

BarAlg

Java Name

BarAlg

.NET Name

BarAlg

InteractiveOptimizer

barrier algorithm

Identifier

3007

Description

The default setting 0 uses the "infeasibility - estimate start" algorithm (setting 1) when solving subproblems in a MIP problem, and the standard barrier algorithm (setting 3) in other cases. The standard barrier algorithm is almost always fastest. However, on problems that are primal or dual infeasible (common for MIP subproblems), the standard algorithm may not work as well as the alternatives. The two alternative algorithms (settings 1 and 2) may eliminate numerical difficulties related to infeasibility, but are generally slower.

Values

Value 
Meaning 
Default setting 
Infeasibility-estimate start  
Infeasibility-constant start  
Standard barrier