Can Optquest able to use 128 cores CPU ?

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Raashid Mohammed asked May 1, '20 tannerp commented May 13, '20

Can Optquest able to use 128 cores CPU ?

Thinking of buying 128 core cpu. Can Optquest run 128 replications at once ?

Also whats the max number of solutions Optquest can store. I am thinking of running >10000 scenarios

Computer specs

https://www.titancomputers.com/Titan-W375-Dual-AMD-EPYC-Rome-7002-Series-Scie-p/w375.htm

Software Version:

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optquest

Answer 1 · 2020-05-01T20:36:24Z

Ben Wilson answered May 1, '20 Ben Wilson edited May 1, '20

Hi @Raashid Mohammed,

There is no program limitation. The only limitations are what your hardware can handle.

In particular, depending on your model and the data you collect, your computer may become memory constrained. Each simultaneously running FlexSim replication needs enough RAM to hit its potential peak memory usage.

Please see this article regarding FlexSim's recommended system requirements:

https://answers.flexsim.com/articles/6/recommended-system-requirements.html

Search for references to the experimenter and optimizer to read up on how multiple simultaneous replications use your computer's resources.

Also what's the max number of solutions OptQuest can store?

From the linked article:

the experimenter has an option to save statistics data for each replication. With that option enabled, each completed replication will send its statistics collectors' data to the main FlexSim thread. If each replication saves 100MB of statistics data, and your experiment run will complete a total of 100 replications, the main FlexSim instance will, by the end of the experiment run, need 100*100MB=~10GB RAM just for that one instance. Be careful with this option as it can very quickly consume your RAM!

@Jordan Johnson, do the optimizer's results work the same way?

Answer 2 · 2020-05-01T23:31:55Z

Jordan Johnson answered May 1, '20

@Raashid Mohammed Ben is right about OptQuest; there is not a limit on cores that is coded anywhere. But the specs you posted show 32 GB of RAM. I suspect that won't be enough to run 128 simultaneous replications.

As far as the optquest number of solutions, if you need more than 10000, you can do that; FlexSim uses the max of 10000 and whatever the stop iteration you specify as the database size for optquest. So if you say that optquest should stop after 20000 iterations, the database will be set to 20000.

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