[Coin-symphony] MIP huge problem and OSS solvers

Thiago Costa Barbanti thiago.barbanti at neoris.com
Fri Jun 2 16:40:39 EDT 2006


Hi fellows,

 

I'm working in a OR solution for a scheduling media plan, the scenarios
it's a huge with 100000 of binary variables and doze of thousands
constraints, I'm using FLOPC++ (OSI framework) with solvers: GLPK,
SYMPHONY, CBC and

OSL, I'm a very to worry about time solution, because the one day of
processing don't return a good solution and because this I am
considering to use ILOG CPLEX to process these problems. I want know if
GLPK or SYMPHONY can resolve a huge problem like this with good feasible
time, I have many reasons to use Free Software, like we know. The
development machine is a Intel P4 3.0GHz, L2 cache with 1024MB and 2GB
RAM, a scenario with 4000 0-1 variables and 1015 constraints using GLPK
solver the solution occurs in 4137 seconds, it's the best result in all
those solvers that I'm using for test. If anyone can help me to not use
cplex I'll be happy.

 

Anticipatedly,  thanks a lot

 

 

Regards

 

 

Thiago Barbanti

Consultant

NEORIS BRAZIL

55-11-5112-9822

55-21-2586-9100

55-11-8468-0255

msn, skype, gtalk: tbarbanti 
thiago.barbanti at neoris.com <mailto:thiago.barbanti at neoris.com> 
www.neoris.com

 


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