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Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIP

From: Noli Sicad
Subject: Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark
Date: Mon, 19 Nov 2012 09:59:58 +1100

Hallo Xypron,

> you are right that the GMPL interpreter has a value on its own.
> Cf.
> Unfortunately the interfaces between GLPK-GMPL and other solvers tend
> to be one time efforts without further maintenance.

Yes, I have been outputting my MIP model into freeMPS and MPS format
and trying to use CBC and LPSolve but I did not manage to get the
desired resutls.

Here attached are the freeMPS and MPS of the Timber Harvesting Model
with Adjacents contrailnts and ever tight evenflows (i.e. + /- 2.5 %
from the previous harvest). This is smoothing of the harvest.

I would like to see some benchmark results on this model using CBC,
LPSolve, CPLEX, Gurobi, etc.

Anybody using CBC and LPSolve, please tell how do you solve this model
and how long it takes to solve it.

GLPK/Mathprog with --pcost switch solve this model in 37m39.289s.

Model has been successfully processed

real    37m39.289s
user    37m37.011s
sys     0m1.930s



Thanks in advance.



Attachment: TimberHarvestModel_0025p_freemps.mps
Description: Binary data

Attachment: TimberHarvestModel_0025p_mps.mps
Description: Binary data

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