CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

CFX-5.7 MPICH Parallel Problem (Output of Results)

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 13, 2005, 14:12
Default CFX-5.7 MPICH Parallel Problem (Output of Results)
  #1
James Date
Guest
 
Posts: n/a
Hi everyone,

I've been having problems with CFX-5.7 in parallel. I've installed CFX on two machines and also installed the RSH and MPICH applications. I've tested the RSH services on both machines and they are both working. The MPICH application is set up with the relevant user name and password on both machines.

I managed to get the parallel solve to run fine, however, when the run finishes solving the last few lines in the solver window are not output i.e. the run time and output directory information. Hence, the .out and .res files are never produced. I've waited 30min but the files are still not generated.

When I take a look at the processes running on the master node, one process "solver-mpichnt.exe" is still running with 100% CPU although the solution phase has finished.

Now if I kill the process through the task manager, the .out file (with out the CPU time and directory information) and .res are magically created!

Has anyone got any idea what might be going wrong with my parallel set up?

Is there some kind of communication problem going on here?

Regards

James

  Reply With Quote

Old   January 13, 2005, 20:51
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #2
Twiti
Guest
 
Posts: n/a
I am just encounting the same thing as you are. And PVM also takes a lot of time for the results file generation after the solution converged. Can anyone give me a way out? Thanks!

Twiti
  Reply With Quote

Old   January 14, 2005, 03:40
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #3
James Date
Guest
 
Posts: n/a
Twiti

I'm finding my results files are never produced even after waiting 30 mins or more. I'm sure there must be a simple answer why this is happening.

James
  Reply With Quote

Old   January 14, 2005, 09:29
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #4
Kiddo
Guest
 
Posts: n/a
I just encountered the same problem 2 days ago! It happened as I updated one machine to CFX5.7.1 and the other one was still CFX5.7. I waited more than 1 hour, still got no pop-up message window to say "finish". But It works fine after I upgrated the other one to CFX5.7.1. Maybe this is not your cases, only for reference!
  Reply With Quote

Old   January 15, 2005, 08:48
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #5
James Date
Guest
 
Posts: n/a
Thanks for your help

I managed to solve the problem in the end. Basically you need to make sure that both machines have the same version of CFX-5.7 installed. So if you have installed a service pack on one machine, it must also be installed on another. I made the mistake of thinking that an install from a service pack was the same as a service pack updated install of CFX-5.7.

I do, however, get an error message when it runs in parallel, does anyone know what it means and if it is anything to be worried about.

Warning! rsh to host PC2 produces the following output before the output of the command Terminal readThe handle is invalid.This may cause problems spawning parallel slaves, especially on windows.

James

  Reply With Quote

Old   January 31, 2005, 11:43
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #6
Goutam
Guest
 
Posts: n/a
We have been facing this "Terminal readThe handle is invalid error" on Windows XP service pack2 when doing rsh. Does any one know how to get rid of this? Thanks!
  Reply With Quote

Old   February 4, 2005, 09:57
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #7
James Date
Guest
 
Posts: n/a
Goutam

Have you managed to fathom out the problem with MPICH yet; Terminal readThe handle is invalid error" ?

It only seems to happen with XP and not Windows 2000.

James
  Reply With Quote

Old   February 15, 2005, 16:03
Default Re: CFX-5.7 MPICH Parallel Problem (Output of Resu
  #8
Reid Judd
Guest
 
Posts: n/a
I'd be interested in the answer too.

If you don't want the message, you can send it to NULL (and maybe miss an important error message as well).

_______________

$rsh="rsh.exe 2> nul $(REMOTE_IPADDR) -n -l $(USERNAME)"
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
problem of running parallel Fluent on linux cluster ivanbuz FLUENT 15 September 23, 2017 19:12
RSH problem for parallel running in CFX Nicola CFX 5 June 18, 2012 18:31
Problem with cfx Solver Results Ordoumpozanis CFX 4 August 27, 2008 11:54
parallel mode - small problem? co2 FLUENT 2 June 1, 2004 23:47
CFX 4.4 installation problem Pandu Sattvika CFX 1 December 1, 2001 04:07


All times are GMT -4. The time now is 02:04.