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GRBaddnodefile failed

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3 comments

  • Jaromił Najman
    Gurobi Staff Gurobi Staff

    Hi Lukas,

    Do you have enough space on the local disc you are using? This error may occur when there is not enough space on disc. This might happen when your MATLAB working directory is space limited due to, e.g., cluster restrictions or similar. Could you try to re-run the optimization and track the disc usage?

    Best regards,
    Jaromił

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  • Lukas Weimann
    Gurobi-versary
    First Question
    First Comment

    Hello Jaromił,

    thanks for your fast response! Running out of space on the disc was also my first guess, but I discarded this thought because there should be 100+GB available. However, I did not think of limitations for a certain directory. I will get in contact with our server admin for that.

    In the meantime, do you know if the number of nodefiles generated, and therefore disc capacity required, reduces if I reduce the number of threads? I understand that I reduce the memory required since every thread needs a copy of the problem. But I could imagine that the total number of nodefiles stored is the same at some point, and that just the speed at which they are generated varies with the number of threads. Is this line of thinking correct or am I missing something here?

    Best wishes,
    Lukas

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  • Jaromił Najman
    Gurobi Staff Gurobi Staff

    Hi Lukas,

    You are correct. Lowering the number of threads only reduces the required memory but not the disc space needed to store the nodefiles.

    Best regards,
    Jaromił

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