CPLEX Optimization Studio

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add doopl in the CPLEX distribution

relying on docplex python API got much easier since docplex was included in the CPLEX product. doopl which is a python package that allows to call OPL model from python code can be download from https://pypi.org/project/doopl/ but having doopl in ...

over 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

2 VOTE

Ability to control cplex memory consumption

Nowadays optimization runs are more and more conducted in the cloud, in kubernetes environments. In kubernetes, the processes run inside containers in what are called pods. To prevent a pod to be killed when the node (machine) capacity is exceeded...

9 months ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Submitted

7 VOTE

Interface between CPLEX and .Net CORE 5 on LINUX

We are developing applications using .Net CORE 5. This is a great language to develop solution on either Windows or Linux. We have no issues using CPLEX with Windows as we have the cp_wrap_cpp_dotnet2010.dll running but we miss a Linux version of ...

almost 3 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

15 VOTE

Nonlinear solver for CPLEX

Add nonlinear optimization capability to CPLEX. Many real-life models are nonlinear by nature. CPLEX solver requires a linear model to work. A good nonlinear solver can often times overperform a linearized form of a real-life model. Having a nonli...

almost 7 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

2 VOTE

Use container / cgroup cores when automatically picking threads

Currently, when auto selecting the number of threads, it looks like cplex uses the number of cpu cores. That doesn't work for containers that are cpu limited using cgroups, as the number of threads will be equal to the host machine's cpu core coun...

about 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

3 VOTE

a new parameter to control to force MIPStart if the variables are feasible

CPLEX choose to use MIPStart or not accoring to the heuristic. But sometimes the user think MIPStart values as particular variables is the best way to solve the problem. So we’d like to request a new parameter to control to force MIPStart if the v...

over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Not under consideration

8 VOTE

OPL language enhancements : cannot slice with nested constraints on subTuples

I've been a happy user of OPL language, which has lots of wonderful features. However, there is one remaining recurrent issue in data modeling, which prevents some intuitive modeling. This is called "cannot slice with nested constraints on subTupl...

over 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Not under consideration

6 VOTE

Produce log during OPL Extract phase similar to Solve Engine Log

Many OPL real-world optimisations spend a large proportion of the overall solve time performing extraction/generation and there is no log of what is happening during this time. There should be a log produced during Extract similar to the Engine Lo...

almost 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Not under consideration

2 VOTE

Superior approximation algorithm for finding Maximum (or large) Cliques in very large graphs. (Multi-Partite Graphs can be found)

Our maximum clique finding algorithm (that is polynomial in its run time) and which seems (from DIMACS benchmark tests) to run better than other methods that are presently available would be beneficial to IBM because it would allow you to solve co...

over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

4 VOTE

In OPL ODBC connection, add a setting for batch size

The prebuilt ODBCConnection allows OPL to access databases using ODBC. One way to optimize database access is to tune the execution batch size. With older versions of OPL that included DBLink, this was the dbUpdateBatchSize parameter.

about 3 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

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