There are many environment variables and command line flags that
can be set to influence the operation of POE tools and the execution of
parallel programs. A complete list of the POE environment variables can
be found in the IBM ``AIX Parallel Environment Operation and Use"
manual. Some environment variables which critically affect program
execution are listed below.
- MP_PROCS - sets number of processes, or tasks,
to allocate for your partition. Often one process, or task,
is assigned to each node, but you can also run multiple tasks
on one node.
- MP_RESD - specifies whether or not the Partition Manager
should connect to the POWERparallel system Resource Manager
to allocate nodes. If the value is set to ``no,'' the
Partition Manager will allocate nodes without going
through the Resource Manager.
- MP_RMPOOL - sets the number of the POWERparallel system
pool that should be used by the Resource Manager for
non-specific node allocation. This is only valid if you
are using the POWERparallel Resource Manager for
non-specific node allocation (from a single pool)
without a host list file.
Information about available pools may be obtained
by typing the command jm_status -P at the