Number of nodes actually used

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Alex Machado

2024年02月09日 21:26

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I'm a student at a public institution, and we have access to a cluster, with quotas of up to 400 cores. However, each node that makes up the cluster has 20 physical cores and 40 threads. Therefore, I would like to know if when specifying the Threads = n > 40 parameter, Gurobi will actually make use of the specified quantity n > 40, or will it be limited to the 40 Threads node?

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  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:30

  This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
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  Mario Ruthmair

  • Gurobi Staff

  2024年02月11日 11:14

  Hi Alex,

  Yes, Gurobi will try to use precisely the amount of threads specified by the parameter Threads, even if this would exceed the number of physical or logical cores. In rare cases, this might be beneficial, but exceeding the number of physical cores usually does not pay off.

  Additionally, not all solver components can make use of multiple threads, so you might observe times during the solve when even only one thread is used.

  Best regards,
  Mario

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  Alex Machado

  2024年02月11日 12:27

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  Perfect. Thanks for the clarifications!

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