[MPICH] mpiexec -machinefile option in 1.0.6

[Vlad Branzoi]

Hi Jayesh,

Thanks a lot for the response.  Here're the results of your suggestions and
some of my own testing:

mf.txt:

hosta:1
hostb:2

- mpiexec -l -machinefile mf.txt -n 3 cpi.exe

This works fine starting 1 client on hosta and 2 clients on hostb

- mpiexec -l -machinefile mf.txt -n 1 cpi.exe : -n 2 cpi.exe

This starts all of them on hosta (localhost)

- mpiexec -l -machinefile mf.txt -n 1 cpi.exe : -machinefile mf.txt -n 2
cpi.exe

This will start 2 on hosta and 1 on hostb.  Apparently the second
incantation of machinefile makes it start from the beginning again.

SO, through this insight I split up the machine file into 2 separate machine
files as such:

mf1.txt:

hosta:1

mf2.txt:

hostb:2

And then ran the following mpiexec command:

- mpiexec -l -machinefile mf1.txt -n 1 cpi.exe : -machinefile mf2.txt -n 2
cpi.exe

This ran correctly 1 instance on hosta and 2 instances on hostb.

Not sure if this was the intended way -machinefile is supposed to work now
but now that I know it's fine with me :)

Thanks a lot for your help,
Vlad


-----Original Message-----
From: Jayesh Krishna [mailto:jayesh at mcs.anl.gov]
Sent: Monday, December 10, 2007 16:47 PM
To: 'Vlad Branzoi'
Cc: mpich-discuss at mcs.anl.gov
Subject: RE: [MPICH] mpiexec -machinefile option in 1.0.6


Hi,
 Did you try specifying the -machinefile option for each of the executables
?

(mpiexec -l -machinefile mf.txt -n 1 server.exe : -machinefile mf.txt -n 4
client.exe)

 Can you run cpi.exe using the machinefile option ?

(mpiexec -machinefile mf.txt -n 4 cpi.exe)

Regards,
Jayesh

-----Original Message-----
From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Vlad Branzoi
Sent: Monday, December 10, 2007 1:25 PM
To: mpich-discuss at mcs.anl.gov
Subject: [MPICH] mpiexec -machinefile option in 1.0.6

Has anyone else noticed that the -machinefile option for mpiexec no longer
works ? At least this seems to be the case for me under WinXP with 1.0.6p1.
No matter what is in the machinefile the mpiexec ignores it and does it's
own thing.

For example:

machinefile mf.txt:
hosta:1
hostb:8

Try to run with:

mpiexec -l -machinefile mf.txt -n 1 server.exe : -n 4 client.exe

will try to run everything on the local machine.

Is this a known bug ? Is there a workaround ?

Thanks,
Vlad