CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Fluent/Unix vs. Fluent/Windows

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   December 4, 2004, 10:27
Default Fluent/Unix vs. Fluent/Windows
  #1
sjjaber
Guest
 
Posts: n/a
Hi! we use Fluent6.0 under unix on HP server ( we use reflection X to communicate with windows). my company wants to move to Fluent windows version, to use MicroSoft capabilites especially in postprocessing part of CFD.

anyone has experience/thoughts regarding this matter? do you think it is a wise move?

Thanks
  Reply With Quote

Old   December 4, 2004, 21:01
Default Re: Fluent/Unix vs. Fluent/Windows
  #2
ap
Guest
 
Posts: n/a
No, I don't think it's a good choice. My reasons are not related to FLUENT, which works almost in the same way on both platforms, but rely on the difference between the two operating systems.

There are many good reasons to stay on Unix or Linux:

1) Unix and Linux are more secure and stable. Almost all vulnerabilities tipical of the Windows systems are absent on Unix and Windows.

I don't trust Windows and I won't do my calculations on a Windows system, expecially if they are a reserved work.

Windows is too vulnerable to net attacks due to its architecture, which is too much integrated with Internet Explorer and suffers of its bugs.

2) Windows is frequently patched, and all system patches requires a reboot of the system. It's really boring to reboot while you're working.

3) Windows requires additional antivirus and antispyware software, which uses system resources to do its work and subtract them to your calculations. Also consider their licence cost and the time required for their upgrades. If you properly set up your unix system, with a strong firewall configuration, you can forget antivirus.

4) Unix and Linux are more efficient in managing system resources, expecially on a server system. Windows usually slows down with usage.

5) Windows file system requires defragmentation. Unix and Linux filesystems don't! So, you don't need to spend your time to defragment your disk, if you stay on Unix/Linux.

6) All major CFD software and postprocessing tools, together with a wide range of mathematical and scientific software are available for both Windows and Unix/Linux.

I could go on for long time.

I don't know what specific software your company needs, but probably there is the same software or a similar one for Unix.

What are Microsoft capabilities which are absent on your Unix system? What tools do you need?

Hi

ap
  Reply With Quote

Old   December 5, 2004, 19:48
Default Re: Fluent/Unix vs. Fluent/Windows
  #3
Rob Hart
Guest
 
Posts: n/a
There are advantages of both platforms, but I think a lot depends on the users involved.

Personally I prefer unix, but I know a lot of people aren't really at home with it, so don't get the advantages out of it.

How many fluent users do you have? and what are their opinions? Why does the "company" want to move to windows?

There are a number of potential problems if you need to transfer existing cases and data files from one platform to the other, but nothing you can't overcome.
  Reply With Quote

Old   December 6, 2004, 06:16
Default Re: Fluent/Unix vs. Fluent/Windows
  #4
Andrew Garrard
Guest
 
Posts: n/a
I concur with ap.

I have used both Fluent on both operating systems and not noticed much difference in the functionality. I now run all my work on a RedHat system.

The only advantage I can see windows having is it's "user friendly" interface. I am not an experienced Linux user, but it really isn't that difficult to learn enough basics to install and execute fluent, manage your files and set up your security. The performance pay offs are noticeable as well as all the other points raised in ap's post. And, should your company need more convincing, the best bit is that it is entirely free.
  Reply With Quote

Old   December 6, 2004, 13:12
Default Re: Fluent/Unix vs. Fluent/Windows
  #5
Evan Rosenbaum
Guest
 
Posts: n/a
We are actually considering the opposite migration. Some of our recent models have pushed GAMBIT to its limits. We has all sorts of trouble that didn't occur on FLUENT's linux machines but did on our PCs. I think (my personal opinion) there were two reasons.

1. FLUENT develops on linux. The PC versions are ports, and subject to more bug potential because of the extra operations.

2. Windows memory management is not as good as linux.

Many of the problems we had on the were not reproducible by FLUENT's tech support under linux, but were reproducible by them on PCs.
  Reply With Quote

Old   December 6, 2004, 17:58
Default Re: Fluent/Unix vs. Fluent/Windows
  #6
ap
Guest
 
Posts: n/a
Yes, I forgot to mention this. Windows version has some problem which are absent on Linux.

Morover, GAMBIT run under eXceed X emulator on Windows, which adds potential problems and requires additional resources.

Hi,

ap :-D
  Reply With Quote

Old   December 6, 2004, 20:46
Default Re: Fluent/Unix vs. Fluent/Windows
  #7
zxaar
Guest
 
Posts: n/a
there is one more problem on windows ... often when after a big run you are trying to visualise the results and suddenly fluent will hang, and the only way out then be to lose your run, because of this i always save my files first before touching the post processor (but it sucks to be insecure)
  Reply With Quote

Old   December 7, 2004, 18:39
Default Re: Fluent/Unix vs. Fluent/Windows
  #8
ap
Guest
 
Posts: n/a
Right, you're not secure on the net, you're not secure while working.

That's the essential point: on Windows you're not secure.

ap
  Reply With Quote

Old   December 11, 2004, 06:53
Default fluent installation in linux
  #9
yot
Guest
 
Posts: n/a
We have installed fluent in linux system, but we don't know how to set the license,environmental variables etc., please help us.
  Reply With Quote

Old   January 5, 2005, 14:56
Default Re: Fluent/Unix vs. Fluent/Windows
  #10
Samir
Guest
 
Posts: n/a
Hi guys,

I recently switched to Linux and am using StarCd on it. I am trying to install Fluent too. But the platform compatibility chart says its not compatible with a 64 bit pentium/ Xeon processor. I tried installing it, but it gives me an error saying: $ fluent /Fluent/Fluent.Inc/fluent6.1.22/cortex/lnx86/cortex.3.5.6 -f fluent (fluent " -path/Fluent/Fluent .Inc") /Fluent/Fluent.Inc/fluent6.1.22/cortex/lnx86/cortex.3.5.6: error while loading shared libraries: l ibstdc++-libc6.2-2.so.3: cannot open shared object file: No such file or directory

Does any of you have an idea what this means?. Thanks in advance. Regards Samir.
  Reply With Quote

Old   January 5, 2005, 17:58
Default Re: Fluent/Unix vs. Fluent/Windows
  #11
ap
Guest
 
Posts: n/a
Probably you're using Red Hat Linux (> 7) or Fedora Core.

The problem happens beacause Red Hat uses a different version of the libstdc library.

I had the same problem, and I solved it by just installing the proper version of libstdc.

This can be done by installing the RPM compat-libstdc++

If you're using RedHat or Fedora Core, look here:

http://www.experts-exchange.com/Oper..._20960769.html

P.S. The problem doesn't exist on other Linux distributions like Novell SuSE Linux, which is, in my opinion, easier to use, more powerful and more supported.

Regards, ap
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 15:02.