All you have to do is read the documentation - a simple "man at" would give you
a detailed explanation of the at command:
NAME
at, batch, atq, atrm - queue, examine or delete jobs for later execution
SYNOPSIS
at [-V] [-q queue] [-f file] [-mldbv] TIME
at [-V] [-q queue] [-f file] [-mldbv] -t time_arg
at -c job [job...]
atq [-V] [-q queue]
atrm [-V] job [job...]
batch
DESCRIPTION
at and batch read commands from standard input or a specified file which
are to be executed at a later time.
at executes commands at a specified time.
atq lists the user’s pending jobs, unless the user is the
superuser; in that case, everybody’s jobs are listed. The format of
the output lines (one for each job) is: Job number, date, hour,
queue, and username.
atrm deletes jobs, identified by their job number.
batch executes commands when system load levels permit; in other
words, when the load average drops below 0.8, or the value speci-
fied in the invocation of atd.
...
Then write a simple script:
#!/bin/sh
mpiexec <first job>
mpiexec <second job>
...
and run it using one of the at-like commands.
On Jan 3, 2014, at 11:37 PM, Ng Shi Wei <nsw_1...@hotmail.com> wrote:
> Any examples ? I am not familiar with task scheduling.
>
> Your Help will be appreciated.
>
> Thanks in advance.
>
> Best Regards,
> Shi Wei.
>
> From: r...@open-mpi.org
> Date: Fri, 3 Jan 2014 19:00:06 -0800
> To: us...@open-mpi.org
> Subject: Re: [OMPI users] Unable to schedule an MPI tasks
>
> Why don't you just have one script that executes all the jobs sequentially,
> and then use the "at" command to start it?
>
>
> On Jan 3, 2014, at 8:36 AM, Ng Shi Wei <nsw_1...@hotmail.com> wrote:
>
> Hi Reuti,
>
> May I know how to starts the second mpi program once the previous program is
> finished? I am using Fedora Cluster.
>
> Hope you can provide me some guide on this.
>
> Thank you.
>
> Best Regards,
> Shi Wei.
>
> > From: re...@staff.uni-marburg.de
> > Date: Tue, 27 Aug 2013 08:56:26 +0200
> > To: us...@open-mpi.org
> > Subject: Re: [OMPI users] Unable to schedule an MPI tasks
> >
> > Hi,
> >
> > Am 27.08.2013 um 03:45 schrieb Ng Shi Wei:
> >
> > > Due to the time constraints, I would like to run the mpi program by
> > > scheduling the program to run on desired time using the "at" command.
> > > However, it seems that the mpirun doesn't execute the mpi program at the
> > > desired time using the "at" command.
> > >
> > > I would like to ask is there any other method to schedule a program to
> > > run ?
> > > For best, it can straight away starts the second mpi program once the
> > > previous program is finished.
> >
> > Is this a local machine just for you, a cluster for you or one shared by
> > several users?
> >
> > You could also think of implementing a full blown queuingsystem like SoGE
> > https://arc.liv.ac.uk/trac/SGE or
> > Torquehttp://www.adaptivecomputing.com/products/open-source/torque/
> >
> > You don't have to think about a time when the job should start then (even
> > though this is possible with the -a option), but requesting the intended
> > number of cores will allow a job to run as soon as these resources are
> > available. I.e. you can submit several jobs at once but they will be
> > executed one after the other without oversubscribing the available
> > resources.
> >
> > -- Reuti
> >
> > NB: There is also the command `batch` in the at-suite to start the next job
> > when the load drops under a certain value.
> >
> >
> > > Hope to get some reply from you all.
> > >
> > > Thanks in advance.
> > >
> > > Best Regards,
> > > Shi Wei
> > > _______________________________________________
> > > users mailing list
> > > us...@open-mpi.org
> > > http://www.open-mpi.org/mailman/listinfo.cgi/users
> >
> > _______________________________________________
> > users mailing list
> > us...@open-mpi.org
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
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