As many other before, i'm a new user of glpk and cplex. I'm currently facing a strange problem and i hope that some one may understand it or tell me how to fix it.
I'm using glpsol to convert a mathprog model (model.mod) with data (model.data) into a cplex model (model.lp). So far every thing is fine! Then i tried to solve that model using cplex interactive and oplide (ibm ilog cplex Optimization Studio). The problem is that the time to solve the problem with this two ways are totaly different. I'm going from 52 minuts with oplide to more than two hours with cplex interactive.
So i'm wondering if :
- The way glpsol write model.lp isn't that good and may impact a lot my performances (by the way when i use oplide, i write a new file containing the model and new data so that it can be read) ?
- Some options that i don't know yet might be used by oplide by default and help it to solve the problem way faster than cplex?
If some one has faced that problem and can tell me what is the problem, i would be very glad.
Many Thanks, Regards,