Using solver Gurobi instead of CPLEX
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Description
As reported by @tomoki-nishi, running `message_ix` using the solver Gurobi instead of CPLEX is working with adjustments to the GAMS formulation:
https://github.com/iiasa/message_ix/blob/1680452d53ed646eca1b84e7446da0f255d8351c/message_ix/model/MESSAGE/auxiliary_settings.gms#L23
To make this transparent to other users, we can extend the documentation accordingly.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the GAMS formulation at message_ix/model/MESSAGE/auxiliary_settings.gms around line 23 and determine which adjustments are needed when using Gurobi instead of CPLEX. Locate the relevant documentation section and document the solver-specific setup so users can follow it without relying on an undocumented workaround.
Written by the indexing model from the issue text.
Assessment
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100