
2 Netw ork Administration
With Third-Party Scheduler
Before the worker processes start, you can control the range of ports used by
the workers for communicating jobs by defining the environment variable
MPICH_PORT_RANGE with the value minp ort: maxport.
Client Ports
With the pctcon fig function, you specify the ports used by the client. If
thedefaultportscannotbeused,thisfunction allows you to configure ports
separately for communication with the job scheduler and com m unication
with pmode or a parallel pool.
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