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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Are there any known issues with COMSOL 4.4 running in virtual machines?

Posted 2014年2月5日 GMT-5 12:06 Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD) Version 4.4 2 Replies

Tiago Sotto Mayor
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While trying to solve a simple heat transfer problem with COMSOL 4.4 in a virtual machine I noticed 9 minutes were needed to find a solution. While trying to solve the same problem (exactly the same file), in the host physical machine, it took only 9 seconds. The problem in question does not require more than 2 GB of RAM to solve.

The physical machine is equipped with 64GB of RAM, and 2 CPUs (intel XEON E5-2630 V2 @2.6GHz), with a total of 12 physical cores (24 virtual processors with multithreading). The Virtual machine was running in the above physical machine, with allocated 16GB of RAM and 20 virtual processors.

During the calculation in the Virtual Machine, the CPU usage of the 20 virtual processors was always 99-100%, whereas in the physical machine they peaked at 50%. The OS of these machines are as follows:
- Host operating system (physical machine): windows server 2012 R2
- Guest operating system (virtual machine): windows server 2008 R2

This problem did not occurred with previous versions of COMSOL. Did this problem happened to you previously? How did you solve it?

Thank you very much.
2 Replies Last Post 2014年11月9日 GMT-5 06:45
Sven Friedel COMSOL Employee

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Posted: 1 decade ago 2014年2月10日 GMT-5 04:39
Hi,

this case is handled as a COMSOL support case.

Sven
Hi, this case is handled as a COMSOL support case. Sven
Ronny Moreas
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Posted: 1 decade ago 2014年11月9日 GMT-5 06:45
We deliver COMSOL to students using Citrix XenApp on virtual machines. It would be interesting to know if there any implications running COMSOL on virtual machines. Could you give some details about this support case?

Thanks in advance.
We deliver COMSOL to students using Citrix XenApp on virtual machines. It would be interesting to know if there any implications running COMSOL on virtual machines. Could you give some details about this support case? Thanks in advance.

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