Reply To: Simulation Run Time – Lumerical FDTD

[Lito]

Yes you can certainly have 2 user run 2 simulations at the same time but just not recommended to run at the same machine. Each user should be running their simulation on their own local desktop. The license can be shared across other users/computers that is connected to the same local network as the license server running the Ansys License Manager:
>>>How to obtain a floating license – Ansys Optics

This is just how FDTD behaves. It takes up alot of your CPU and bandwidth. And increasing the number of MPI processes/cores to run the simulation is not linear. This will depend on the simulation itself and the machine as shown in our KB: 
>>>FDTD Performance Benchmarks – Ansys Optics 

You may be able to run small/less complex concurrent simulation/parameter sweeps but larger and more complex simulation jobs that requires more memory and resources should run by itself on one machine.