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Re: [Help-glpk] GLPSOL solver running problem

From: Nigel Galloway
Subject: Re: [Help-glpk] GLPSOL solver running problem
Date: Sat, 21 Feb 2015 05:14:31 -0800

Do you have 30GB of memory available? With no idea what you have put into all these rows and columns of the constraint matrix it is impossible to be specific, but the model is at least (definitely I would say at least) 5 times larger than anything I would even dream of attempting on my 8GB desktop.
You are going to have to find some way of starting smaller, I would say about 1% of its current size, then scale up identifying the resources you are using and predicting the maximum you can possibly hope to build.
Have you tried using GLPK's API to understand what the internal data structures are and possibly finding a way of using the API to build this model more efficiently then MATHPROG can?
Nigel Galloway
On Sat, Feb 21, 2015, at 12:23 AM, Le Van Duc wrote:
Dear all,
I have implemented a mixed linear integer programming model using GNU MathProg language and run program using GLPSOL solver. While the program is running, the result has been shown as: 
...$ glpsol --model controlCoverageWithConnectivity2.mod --data dataInput.dat
GLPSOL: GLPK LP/MIP Solver, v4.45
Parameter(s) specified in the command line:
--model controlCoverageWithConnectivity2.mod --data dataInput.dat
Reading model section from controlCoverageWithConnectivity2.mod...
110 lines were read
Reading data section from dataInput.dat...
12507527 lines were read
Generating totalInt...
Generating c1...
Generating c2...
Generating c3...
Generating c4...
Generating c5...
Generating c6...
Generating c7...
Generating c8...
Model has been successfully generated
GLPK Integer Optimizer, v4.45
12505004 rows, 6252500 columns, 25458088 non-zeros
2500 integer variables, all of which are binary
I do not know why the process is suddenly killed as above and the program is stopped. Please let me know what is problem and how to solve this.
Thank you so much!
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