Take a look at "man orte_hosts" for a full explanation of how to use hostfile -
/etc/hosts is not a properly formatted hostfile.
You really just want a file that lists the names of the hosts, one per line, as
that is the simplest hostfile.
> On Sep 7, 2019, at 4:23 AM, Sepinoud Azimi via users
> wrote:
>
> Hi,
>
> I have a parallelized code that works fine on my local computer with the
> command
>
> $mpirun -n 5 python parallel_simulation.py
> but when I try the same code on cluster I only get one process and it is not
> running in parallel. I have both mpich and openmpi loaded on my cluster.
>
> I tried to use
>
> $mpirun -n 5 -hostfile /etc/hosts python parallel_simulation.py
> which gives me error
>
> Open RTE detected a parse error in the hostfile:
>
>
> /etc/
> hosts
>
> It occured on line number 39 on token 12.
> --
> --
> An internal error has occurred in ORTE:
>
>
>
> [[57450,0],0] FORCE-TERMINATE AT (null):1 - error
> base/ras_base_allocate.c(302)
>
>
>
> This is something that should be reported to the developers.
> This is what I get when I run:
>
> $cat /etc/hosts
>
>
> # Ansible managed file, do not edit directly
>
> 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.
> localdomain4
>
> ::1 localhost localhost.localdomain localhost6 localhost6.
> localdomain6
>
>
> # Hosts from ansible hosts file
> 10.1.1.2 titan-install.int.utu.fi titan-install
> 10.1.1.1 titan-admin.int.utu.fi titan-admin
> 10.1.1.3 titan-grid.int.utu.fi titan-grid
> 10.1.100.1 ti1.int.utu.fi ti1
> 10.2.100.1 ti1-ib.int.utu.fi ti1-ib
> 10.1.100.2 ti2.int.utu.fi ti2
>
>
> I would be very grateful if someone could suggest a solution. I am very new
> to this and I am not sure how to solve the problem.
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