Figure 4.61: The General Tab in the GUROBI Options Dialog Box
You can change the general options for GUROBI by choosing GUROBI parameters from the Options menu and then pressing the General tab. This will display the dialog box shown below:
Figure 4.61: The General Tab in the GUROBI Options Dialog Box
| Option Name | MPL Name | Solver Param | ParamNr | Type | Default | Min | Max |
|---|---|---|---|---|---|---|---|
| Algorithm | OptimizeAlgorithm | METHOD | 1 | list | -1 | -1 | 4 |
| IISMethod | IISMethod | IISMETHOD | 20 | list | -1 | -1 | 1 |
| Threads | Threads | THREADS | 8 | int | 0 | 0 | 1024 |
| Time Limit | SolTimeLimit | TIMELIMIT | 15 | real | MAXREAL | 0.0 | MAXREAL |
| Iteration Limit | IterationLimit | ITERATIONLIMIT | 14 | real | MAXREAL | 0.0 | MAXREAL |
| Objective cutOff Limit | ObjectiveCutOff | CUTOFF | 13 | real | MAXREAL | -MAXREAL | MAXREAL |
| Log Interval | LogFrequency | DISPLAYINTERNAL | 11 | int | 5 | 1 | MAXINT |
| Log File Name | FileName | string | *.log |
The algorithm option selects which algorithm to use when solving LP problems.
| Automatic (-1) | Automatically determines LP method. |
| Primal Simplex (0) | Use the Primal Simplex method. |
| Dual Simplex (1) | Use the Dual Simplex method. |
| Barrier (2) | Use the Barrier method. |
| Concurrent (3) | Use the Concurrent approach. |
| Deterministic Concurrent (4) | Use the Deterministic Concurrent approach. |
Chooses the IIS method to use.
| Automatic (-1) | Automatically determines IIS method. |
| Faster (0) | Generally faster IIS method. |
| Smaller (1) | Generates a smaller IIS. |
Controls the number of threads to apply to parallel MIP and/or Barrier. The default value of 0 sets the thread count equal to the maximum value, which is the number of processors in the machine. A value of 0 uses one thread.
Limits the total time expended (in seconds).
Limits the number of simplex iterations performed.
Sets a target objective value; optimization will terminate if the engine determines that the optimal objective value for the model is worse than the specified cutoff.
Controls the frequency at which log lines are printed (in seconds).
Determines the name o fthe log file, default is the model name with extension (*.log).