Large model with independent blocks

Answered

Bryan Arguello

June 27, 2025 13:23

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I have a large bilevel stochastic model that I coded up in Pyomo.  I am fixing the upper-level decisions to focus on the stochastic layer.  After fixing these decisions, I basically have an independent block for each scenario with its own objective (there are no linking constraints since the linking is really done at the upper-level of my bilevel model). 

My question: is Gurobi developed to recognize such situations and solve the independent blocks in parallel?  I am trying to decide whether or not to speed up the solve by spinning up individual solves on the scenario blocks.  

Related to

• Stochastic

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  Riley Clement

  • Gurobi Staff

  June 27, 2025 13:42

  Hi Bryan,

  Yes Gurobi should detect the structure.  You can test this by setting Disconnected=0 to disable detection and observing any difference in performance.

  - Riley

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  Bryan Arguello

  June 27, 2025 14:07

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  Thanks Riley!

  -Bryan

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