[mpich-discuss] Unexpected results

[Winkler, Ursula (ursula.winkler@uni-graz.at)]

Hi Ken,

yes. I often make the same experience - as soon as one explaines a problem to somebody else, one finds the answer.  You can call that "passive" help by the listener :)

Hope you have a good and - now relaxed - weekend!

Ursula

Von: Ken Miller [mailto:swonomo at gmail.com]
Gesendet: Freitag, 03. April 2015 13:01
An: discuss at mpich.org
Betreff: Re: [mpich-discuss] Unexpected results

Ursula,

No worries, just glad I could get it to work. Sometimes it just takes someone to help think differently :)

Thanks again.

Ken


On Apr 3, 2015, at 6:43 AM, Winkler, Ursula (ursula.winkler at uni-graz.at<mailto:ursula.winkler at uni-graz.at>) <ursula.winkler at uni-graz.at<mailto:ursula.winkler at uni-graz.at>> wrote:


>I tried disabling the firewall real quick and still got the same results.

Disabling a potential error source for trial and error is always a good thing to isolate a problem.

However, at one point I got the following error:
[proxy:0:1 at Pi02] launch_procs (/home/pi/mpich2/mpich-3.1/src/pm/hydra/pm/pmiserv/pmip_cb.c:641): unable to change wdir to /home/pi/mpi_test (No such file or directory)

So I scratched my head and wondered if it was something as silly as the fact that I was calling mpiexec from a directory that existed on Pi01 and not on the other three. I quickly created the same directory on the other three Pis and bam:

pi at Pi01 ~/mpi_test $ mpiexec -f machinefile -n 4 hostname
Pi01
Pi04
Pi03
Pi02

Was it really that simple?

Thanks.

Ken

Yes, That *IS* possible ! :)   As you mention it now - I had the same problem some years ago. Unfortunately I didn't remember in time sparing you from dealing with  the same trouble.

Ursula


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