ParaStation MPI can be easily integrated with batch queuing and scheduling systems. In this case, the queuing system will decide, where (and when) to run a parallel task. ParaStation MPI will then start, monitor and terminate the task. In case of higher prioritized jobs, the batch system may also suspend a task using the ParaStation MPI signal forwarding.
Integration is done by setting up ParaStation MPI environment variables,
like PSI_HOSTFILE.
ParaStation MPI itself need not be modified in any way.
It is not necessary to use a
remote shell (rsh) to start
mpirun on the first node of the selected
partition. The batch system should only run the command on the
same node where the batch system is running, ParaStation MPI will start all
necessary processes on the remote nodes. For details about
spawning processes refer to ParaStation MPI User's Guide.
If an external queuing system is used, the environment
variable PSI_NODES_SORT should be set to
"none", thus no sorting of any predefined node list will be
done by ParaStation MPI.
ParaStation MPI includes its own queuing facility. For more details, refer to the section called “Using the ParaStation MPI queuing facility” and ParaStation MPI User's Guide.
Parallel jobs started by PBS PRO using the ParaStation MPI
mpirun command
will be automatically recognized. Due to the environment
variable PBS_NODEFILE, defined by PBS PRO, ParaStation MPI
will automatically setup the PSI_HOSTFILE to
PBS_NODEFILE.
The environment variable PSI_NODES_SORT is set to
"none", thus no sorting of the predefined node list will occur.
The tasks will be spawned in the given order on the
predefined list of nodes.
Therefore, ParaStation MPI will use the (unsorted) hostfile supplied by PBS PRO to startup the parallel task.
Refer to previous the section called “Integration with PBS PRO”.
Refer to previous the section called “Integration with PBS PRO”.
Similar to the section called “Integration with PBS PRO”, ParaStation MPI will also recognize
the variable LSB_HOSTS, provided by LSF.
This variable holds a list of nodes for the parallel task. It
is copied to the ParaStation MPI variable PSI_HOSTS,
consequently it will be used for starting up the task.
The environment variable PSI_NODES_SORT is set to
"none", thus no sorting of the predefined node list will occur.
The tasks will be spawned in the given order on the
predefined list of nodes.
ParaStation MPI recognizes
the variable LOADL_PROCESSOR_LIST, provided by
IBM LoadLeveler.
This variable holds a list of nodes for the parallel task. It
is copied to the ParaStation MPI variable PSI_HOSTS,
consequently it will be used for starting up the task.
The environment variable PSI_NODES_SORT is set to
"none", thus no sorting of the predefined node list will occur.
The tasks will be spawned in the given order on the
predefined list of nodes.