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Using Windows/Linux

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4 comments

  • Sonja Mars
    Gurobi Staff Gurobi Staff

    Hi Theresa,

    Can you share some log files or snippets from the log files (I guess the 33 hours log might be a bit long for a post)? This would be helpful to understand a bit better what is going on.

    In general, the solver can take a different path through the branch-and-bound tree on different operating systems. And a different path can result in a different runtime. 

    Best,
      Sonja

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  • Tessa Meyer
    Conversationalist
    Curious
    Gurobi-versary

    Hi Sonja.

    Actually, I can not directly interact with gurobi as there is an other framework in between. So to write the logfile I passed the parameter 'LogFile' (the same way I passed the parameters 'NodefileStart' and 'MIPGap' which work). But it is not writing a logfile.

    You say the runtime can depend on the operating system. So it seems like Gurobi might be more suitable for Windows in general or just in these specific case?

     

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  • Sonja Mars
    Gurobi Staff Gurobi Staff

    What tool are you using? Did you provide a full path to the log file location? It is possible that you have to additionally set something like outputflag. 

    You say the runtime can depend on the operating system. So it seems like Gurobi might be more suitable for Windows in general or just in these specific case?

    No, the solver can just take a different path. If you use a different data set for your model it can be the opposite. You might find this article useful: Why does Gurobi perform differently on different machines?

    Without a log file it is really hard to say what exactly is going on. 

    Best,
      Sonja

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  • Tessa Meyer
    Conversationalist
    Curious
    Gurobi-versary

    I am using the energy modelling framework oemof which uses the framework pyomo itsself. Providing the path and setting the output flag does not make it write the logfile. So there might be some issue with pyomo.

    Greetings

    Theresa

     

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