Re: [Condor-users] MPI Setup

[rnayar@xxxxxxxx]

Thanks for the great tip and help, I was wondering if I was going to need to 
set up password-less ssh login but it looks like condor takes care of all that 
using its own version of RSH. So essentially you just need to modify your 
global config file with the paramaters as you stated

DedicatedScheduler = "DedicatedScheduler@xxxxxxxxxxxxxxxxxxxxxxxxxxxx"
STARTD_EXPRS = $(STARTD_EXPRS), DedicatedScheduler
MPI_CONDOR_RSH_PATH = /net/condor/sbin

So far my test setup is 2 computers both running FC3 and the headnode's /home 
is mounted automatically when ever a client accesses its own home. My next task 
was to get MPI up and running. 

thanks for your help, I'll let you guys know if i run into anything weird.

Danny










Quoting "Junaid N. Sahibzada" <sjunaidn@xxxxxxxxx>:

> Hi Rok
>   
>   can you tell me if MPICH2 works with condor 6.7?
>   
>   also, i am having trouble setting up a ring. i have individual mpds 
> running on all machines but they dont seem to know about each other.
>   
>   also, can you tell me if i need to setup a ring while using condor?
>   
>   and why are you saying that i dont need MPI on condor?
>   
>   regards
> 
> Rok Roskar <roskar@xxxxxxxxxxxxxxxxxxxx> wrote:  I've put together a
> condor-MPI tutorial for the particular code that we 
> use here. It doesn't really involve much about the specifics of the 
> condor administrative end though... I've set it up here, so that MPI 
> jobs behave in the same way as single-processor jobs, which means that 
> they can get preempted, evicted etc. The MPI "cluster" is actually a 
> set of 18 computer lab desktop machines, linked together with a 
> high-speed network. This was accomplished very easily by simply 
> including the following lines:
> 
> DedicatedScheduler = "DedicatedScheduler@xxxxxxxxxxxxxxxxxxxxxxxxxxxx"
> STARTD_EXPRS = $(STARTD_EXPRS), DedicatedScheduler
> MPI_CONDOR_RSH_PATH = /net/condor/sbin
> 
> Note that the last line is not specified in the manual, and the first 
> line has regular quotes, not two single quotes like in the manual. Also 
> note that I didn't change any policies for these resources, all types 
> of job universes abide by the same rules.
> 
> I then had to recompile my code using mpich - the mpich download page 
> actually has a condor version.
> 
> That was it. I do have passwordless ssh logins configured, but I don't 
> even think you need that to run mpi in condor.
> 
> Rok
> 
> -----------------------------------------
> Rok Roskar
> University of Washington
> Department of Astronomy
> 
> On Feb 2, 2006, at 3:02 PM, rnayar@xxxxxxxx wrote:
> 
> > Hello everyone, for those of you who actually got MPI jobs up and 
> > running can
> > you give us a greater insight as to how you accomplished this? Through 
> > the
> > installation of MPI, any type of configurations (i.e. passwordless ssh 
> > logins
> > etc). I've noticed that alot of people seem to be running MPI apps 
> > perhaps we
> > should throw together some sort of "How to MPI" thread.
> >
> > thanks
> >
> > Danny
> > _______________________________________________
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> > Condor-users@xxxxxxxxxxx
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> 
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> 
> 
> Junaid N. Sahibzada
> Cell # (+61) 404 998 494 
> 284/9 Crystal St. Waterloo, 2017, NSW, Australia
> International Student MSc Internetworking, UTS, Australia
> Bachelor of Information Technology, NUST, Pakistan
> 
> 
> 
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