[mpich-discuss] The working of mapall option on windows

[Jeyapandian Kottalam]

Hi Jayesh

I am just running on a single machine with multiple cores. On both machines I start the program using the commands

mpiexec -n 2 program
mpiexec -mapall -n 2 program

The latter behaves the same on both machines, but the former works on only one of them. On the other machine it stops without finding the input file (which is on a mapped drive).

Thanks
Kottalam

-----Original Message-----
From: jayesh at mcs.anl.gov [mailto:jayesh at mcs.anl.gov] 
Sent: Wednesday, March 17, 2010 10:51 AM
To: Jeyapandian Kottalam
Cc: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] The working of mapall option on windows

Hi,
 Can you provide the complete mpiexec command that you use to launch your MPI program ? Are you running the MPI jobs locally on each machine (MPI processes belonging to the job are launched only on the localhost)?

Regards,
Jayesh
----- Original Message -----
From: "Jeyapandian Kottalam" <JKottalam at reactiondesign.com>
To: mpich-discuss at mcs.anl.gov
Sent: Wednesday, March 17, 2010 10:49:31 AM GMT -06:00 US/Canada Central
Subject: [mpich-discuss] The working of mapall option on windows





Hi 



I have built my program with MPICH2 1.0.8p1 on Windows XP. My input and output files are on mapped drives. I run the program on two different Windows XP machines and get different behaviors. On one machine, I can run the program with or without the -mapall option on mpiexec. On the other machine, the program works only with the -mapall option. On both machines the drives are always mapped at the OS level. Both machines are configured identically as far as I can tell; in fact one was cloned from the other. For supporting my users, I would like to understand why it works on one machine without the -mapall option but not on the other. Where would I look for the differences in configuration? 



Thanks 

Kottalam 
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