Ansys CFX and Fluent on UBUNTU OS

sunilpatil · April 30, 2015, 14:48

Hello Sir,

In my office we are having one server machine (details given below) and eight CPUs connected to it (details given below). Currently ANSYS CFD (CFX and Fluent) is running on windows operating system in distributed mode and we have a sufficient license to parallel run. Now I am planning to replace windows operating system with Linux (Ubuntu) for the server as well as connected 8 CPUs. My question is whether I have to install Ubuntu server OS on server machine and Ubuntu desktop OS on connected nodes or same OS for server and connected nodes because finally I must able to run in distributed parallel by maximum utilizing my hardware.

Please suggest me if anything better than this….

Server Machine
32 core 2.00 GHz intel Xeon(R) X7550
60 GB RAM
1 TB Hard drive

Connected CPUs or nodes (Total 8)
Intel core 2 duo
8GB RAM
250 GB Hard drive

Opaque · April 30, 2015, 15:16

If you are working in a industrial/commercial (not academic) environment, my advice is that you install a supported Linux platform; otherwise, you may encounter issues that will take time (money) to resolve and for which ANSYS may not be able to help you either.

Recall what you save on the OS cost, you will pay resolving unknown issues w/o any support. Perhaps you are lucky and it does work the first time around.

ghorrocks · April 30, 2015, 19:44

I completely support Opaque's comment. I have got better things to do than waste my time sorting out low level dependencies in the OS when simply choosing a supported distribution would make it "just work".

But if you insist on using an unsupported distro, try this thread: http://www.cfd-online.com/Forums/cfx...x-distros.html

sunilpatil · May 2, 2015, 04:32

Hello Sir,
Thank you for your suggestions. I will be continuing with windows OS only. My head node is installed with windows server 2012 data center OS, when i run mpitest it showing Different OS index error (please see the attachment) and i am unable to launch parallel runs from this machine what could be the possible solution. (other systems are loaded with windows 7).

http://postimg.org/image/u54c5wo6d/

ghorrocks · May 2, 2015, 07:52

The screen shot is from an ANSYS executable, not a CFX one. It does not tell you anything useful about CFX (that I am aware of anyway).

Read the documentation about setting up a parallel cluster. Check that serial and local parallel simulations work as well as distributed parallel.

And don't forget there are many different parallel implementations (different MPI versions, PVM and others) so you can try them too.

April 30, 2015, 14:48	Ansys CFX and Fluent on UBUNTU OS	#1
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Hello Sir, In my office we are having one server machine (details given below) and eight CPUs connected to it (details given below). Currently ANSYS CFD (CFX and Fluent) is running on windows operating system in distributed mode and we have a sufficient license to parallel run. Now I am planning to replace windows operating system with Linux (Ubuntu) for the server as well as connected 8 CPUs. My question is whether I have to install Ubuntu server OS on server machine and Ubuntu desktop OS on connected nodes or same OS for server and connected nodes because finally I must able to run in distributed parallel by maximum utilizing my hardware. Please suggest me if anything better than this…. Server Machine 32 core 2.00 GHz intel Xeon(R) X7550 60 GB RAM 1 TB Hard drive Connected CPUs or nodes (Total 8) Intel core 2 duo 8GB RAM 250 GB Hard drive

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April 30, 2015, 15:16		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,873 Rep Power: 33	If you are working in a industrial/commercial (not academic) environment, my advice is that you install a supported Linux platform; otherwise, you may encounter issues that will take time (money) to resolve and for which ANSYS may not be able to help you either. Recall what you save on the OS cost, you will pay resolving unknown issues w/o any support. Perhaps you are lucky and it does work the first time around.

April 30, 2015, 19:44		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	I completely support Opaque's comment. I have got better things to do than waste my time sorting out low level dependencies in the OS when simply choosing a supported distribution would make it "just work". But if you insist on using an unsupported distro, try this thread: http://www.cfd-online.com/Forums/cfx...x-distros.html

May 2, 2015, 04:32		#4
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Hello Sir, Thank you for your suggestions. I will be continuing with windows OS only. My head node is installed with windows server 2012 data center OS, when i run mpitest it showing Different OS index error (please see the attachment) and i am unable to launch parallel runs from this machine what could be the possible solution. (other systems are loaded with windows 7). http://postimg.org/image/u54c5wo6d/

May 2, 2015, 07:52		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	The screen shot is from an ANSYS executable, not a CFX one. It does not tell you anything useful about CFX (that I am aware of anyway). Read the documentation about setting up a parallel cluster. Check that serial and local parallel simulations work as well as distributed parallel. And don't forget there are many different parallel implementations (different MPI versions, PVM and others) so you can try them too.