Originally posted by: CamilaSalles

Hello Guys,

I got tune one lp (export of opl) in java with IloCPlex.

But, I need run multiple lp's, because are multiples scenarios of model, and I need of one option that's good for all scenarios.

And I cannot import multiple lp in IloCplex. Has some away to do that in IloCplex?

I tried to run it in opl, but I had a overflow memory.

Someone can help me with that ?

Thank you,

Hi,

You tried with OPL within the IDE

But have you tried with oplrun ?

   -tune ops-file      tune cplex parameters, with -p
                         multiple run-configurations can be selected,
                         otherwise all

And with interactive cplex ?

CPLEX > User's Manual for CPLEX > Programming considerations > Tuning tool

Examples: time limits on tuning in the Interactive Optimizer

Shows the effect of both deterministic and nondeterministic time limits on the tuning tool in the Interactive Optimizer.

Both overall system time limits (in seconds) and overall deterministic time limits (in ticks) have an impact on tuning. Likewise, both overall time limits and per-problem, per-optimization time limits also govern tuning. These examples in the Interactive Optimizer illustrate key points about time limits and tuning.

regards

Originally posted by: CamilaSalles

Hello AlexFleischer,

I could not open your link, I think that is with error.

I will try with oplrun.

Thank you.

Hi,

I meant a link in the documentation : https://www.ibm.com/support/knowledgecenter/SSSA5P_12.7.1/ilog.odms.cplex.help/CPLEX/UsrMan/topics/progr_consid/tuning/09_eg_time_limits.html

regards

Since the link Alex posted is not that detailed, here is the help text for the 'tune' command in the interactive optimizer:

The TUNE command solves the current problem, or a set of problems
specified in a file, repeatedly with a variety of parameter
settings in order to find settings which reduce solution time.
The current parameter settings are automatically
changed to correspond to the best settings that were found.
These settings can be displayed or written to a file.

Syntax:  TUNE [{parameter file name}] [{problem set file name}]

The first optional filename specifies a parameter file containing
parameter settings that should not be changed while tuning. The
parameter file name must end with .prm. The other optional file
specifies a list of problem file names including directories for
a set of problems for tuning.

Note that this command does not produce a solution to the current
problem.

Example: TUNE
Tunes the problem that exists in memory from a READ or ENTER command.

Example: TUNE myparams.prm
Tunes the problem that exists in memory from a READ or ENTER command,
but leaves the parameters given in the file myparams.prm at their
given values.

Example: TUNE probset.txt
Tunes a set of problems, which are given in the file probset.txt.
Each line in the file is a filename of a problem including directory,
for example:
   /myproblems/problem1.lp
   /myproblems/problem2.lp

Example: TUNE myparams.prm probset.txt
Tunes a set of problems, but leaves the parameters given in the file
myparams.prm at their given values.

So if you have all your models in different .lp files then just create a file that lists all those files and supply it as an argument for tuning. To create the parameters file required as first argument you can just issue command 'write myparams.prm'. That will create a file with appropriate format that does not fix any parameters.

Moreover, the IloCplex class has an overload for the tuneParam() function that takes as argument a list of file names. You can use that to tune for multiple models at the same time. Just check the reference manual for your API here.

Originally posted by: CamilaSalles

Thanks both for the answer.

I will test the options.