1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
.. _label-running-mpi-applications:
Launching MPI applications
==========================
Open MPI can launch MPI processes in a wide variety of environments,
but they can generally be broken down into two categories:
#. Scheduled environments: these are systems where a resource manager
and/or scheduler are used to control access to the compute nodes.
Popular resource managers include Slurm, PBS/Pro/Torque, and LSF.
#. Non-scheduled environments: these are systems where resource
managers are not used. Launches are typically local (e.g., on a
single laptop or workstation) or via ``ssh`` (e.g., across a small
number of nodes).
Similar to many MPI implementations, Open MPI provides the commands
:ref:`mpirun(1) <man1-mpirun>` and :ref:`mpiexec(1) <man1-mpiexec>` to
launch MPI jobs. This section deals with using these commands.
Note, however, that in Open MPI, :ref:`mpirun(1) <man1-mpirun>` and
:ref:`mpiexec(1) <man1-mpiexec>` are exactly identical. Specifically,
they are symbolic links to a common back-end launcher command.
.. note:: The name of the back-end launcher command has changed over
time (it used to be ``orterun``, it is now ``prte``). This
back-end name is largely irrelevant to the user.
The rest of this section usually refers only to :ref:`mpirun(1)
<man1-mpirun>`, even though the same discussions also apply to
:ref:`mpiexec(1) <man1-mpiexec>` (because they are both, in fact, the
same command).
.. toctree::
:maxdepth: 1
quickstart
prerequisites
pmix-and-prrte
scheduling
localhost
ssh
slurm
lsf
tm
gridengine
unusual
troubleshooting
|
