[mpich-discuss] Problem with MPICH2 v1.0.8 on WindowsXP

Jayesh Krishna jayesh at mcs.anl.gov
Mon Dec 15 15:02:28 CST 2008

  You need to run an MPI job as a user. So you can do either one of the

# Create a new user, "mpiJobUser", on both the machines and register the
username/password of the user on both the machines. Your MPI jobs will be
run by "mpiJobUser".

# Create a new user, "Ondrej", on the second computer and register the
username/password of the user on the second computer (Make sure that you
have the same password on both the machines).

  Let us know if it works for you.

(PS: Or if the machines are part of a domain you can register a domain
user to run your MPI job.)


-----Original Message-----
From: Ondrej Sluciak [mailto:ondrej.sluciak at gmail.com] 
Sent: Monday, December 15, 2008 2:38 PM
To: Jayesh Krishna
Cc: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] Problem with MPICH2 v1.0.8 on WindowsXP

No I have one user (Ondrej) on one computer, and the second (shrek) on the
second computer. I can run a mpi program seperately on both machines, but
they don't cooperate if I want them to compute something distributedly.
Anyway, I install virtual machines on both computer with linux and it
works well. It is really not good solution, but at least I got it
working...though the performance is certainly worse than if I had it
naturally in Windows and not in virtual machines.


Jayesh Krishna wrote:
>  Hi,
>   Do you have a user Ondrej on the second machine (Do you have a 
> different password for the user Ondrej on the second machine ?) ? Can 
> you run an MPI program on the second machine (Login to the second 
> host, shrek, and run an MPI program) ?
> Regards,
> Jayesh
> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of pisoir
> Sent: Sunday, December 14, 2008 6:12 PM
> To: mpich-discuss at mcs.anl.gov
> Subject: [mpich-discuss] Problem with MPICH2 v1.0.8 on WindowsXP
> Hello,
> I have one problem on Windows XP SP3 and I'm starting to feel really 
> desperate now. Thanks to help of this:
> http://lists.mcs.anl.gov/pipermail/mpich-discuss/2008-November/000037.
> html I was able to get over the validation of mpiexec (mpiexec 
> -validate returned SUCCESS). Anyway, if I want to run even the 
> simplest program possible,i.e.  mpiexec -host second_host hostname, I 
> always get the error:
> Credentials for Ondrej rejected connecting to shrek
> Aborting: Unable to connect to shrek
> (Ondrej is the name of first computer, shrek is the name of second). 
> If I do "smpd -status shrek" (from Ondrej computer), I get:
> smpd running on shrek
> So it seems that everything is ok. I turned off the firewalls, I can 
> ping each other and also the shared folders are accessible from both 
> computers. Just the mpi is not running as it should. I reinstalled
> mpich2 and rebooted computer so many times, that it couldn't be 
> reinstalled and rebooted any more. Does anyone have some similar 
> problems or at least have any clue how to solve this? Thanks.
> Ondrej
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