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List Info Thread: LAM: multiple users and mpirun
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LAM: multiple users and mpirun |
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List Info Thread: LAM: multiple users and mpirun
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gnu.org wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi
> we have a cluster on which several people want to run
their lam/mpi jobs
> as themselves. alas, this appears to be impossible.
>
> we have a special "lampi" user and lamboot is
run as "lampi".
> we have a daemon (run as lampi) who accepts "job
requests" from
> individuals, queues them, and runs them using mpirun
one by one.
> it works just fine, except that the jobs are run as
"lampi".
> we want the jobs to be run as the owner, so we tried to
have the daemon
> run them as "sudo -u <user> mpirun
...".
> this fails with the message
>
Typically, each user job would be a script which sets the
necessary
environment variables, including PATH, and starts (and later
stops) its
own MPI daemon.
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> we have a daemon (run as lampi) who accepts "job
requests" from
> individuals, queues them, and runs them using mpirun
one by one.
LAM/MPI has the concept of sessions. Normally there is only
one
session per user per node, meaning that there is one daemon
per user
per node that can be launched; this daemon then takes care
of all the
jobs started via mpirun by that user on the node. To have
multiple
sessions, you need to either:
- start the daemons as different users and then run mpirun
also as
these users
- start several daemons as a single user, but specify for
each daemon
a different session suffix. Then mpirun would need to be run
in an
environment which knows about the suffix of the session
where it needs
to connect.
For running as different users (which seems to be what you
want), you
could use LAM/MPI's mpiexec or create a script that does:
lamboot
mpirun
lamhalt
and run mpiexec or this script with 'sudo -u <user>
mpiexec ...'.
--
Bogdan Costescu
IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches
Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg,
GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu