mpich 3.0.4 uses hydra as the default process manager, not mpd. ----- Original Message -----

From: "Ricardo Román Brenes" <[email protected]> To: [email protected] Sent: Wednesday, October 23, 2013 9:51:51 AM Subject: Re: [mpich-discuss] running parallel job issue!

Hi. I'm not sure how it's done on that version of mpich, but you need to be sure that the mpd daemon is running on both hosts (mpdboot or maybe mpiexec starts it ).

Does cpi runs in hosts 2 locally? On Oct 23, 2013 8:47 AM, "Alexandra Betouni" < [email protected] > wrote:

Hey there, I am trying to set up a parallel invironment with 14 machines, running Linux XUbuntu, connected via ethernet. They all have same IP's and same hostnames. Well I started installing mpich-3.0.4 on a single machine, I run the cpi example on localhost by giving mpiexec -host localhost -n 4 ./examples/cpi and everything worked fine! So I continued changing the hostnames of 2 pc's for a start, and setting up the ssh in these two, also I installed the mpich-3.0.4 on the other machine too. By giving the ssh <othermachine> date commant , I get the date of the other host without giving a password, so I think I passed that step too. Next step was to check if the mpich-3.0.4 runs parallel, so I created a machine file (I made a text file giving the hostnames of the two computers , host1 and host2), and save it in my mpich-3.0.4 build directory. Though when I am trying to parallel run the cpi code by giving mpiexec -n 4 -f machinefile ./examples/cpi on my working directory, I get NO errors but neither parallel job... All processes still running on host1 which is my work station. What am I doing wrong? Thanks

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