Pathway/XM System Management Manual

PXMCOM Commands
Compaq NonStop™ Pathway/XM System Management Manual—426761-001
11-9
CONTROL NODE
CONTROL NODE
This command changes CPU definitions for a NODE object while the Pathway/XM
environment is running. The new CPU attribute definitions are used when new processes
are started; the new values do not effect currently running requester or server processes.
Processes currently running in CPUs no longer available to the NODE object are
stopped at the end of their reservation period.
If the Pathway/XM environment is not running when you issue this command, the
PXMCOM process returns an error.
node-name
specifies the name of a previously defined and added NODE object.
*
indicates all NODE objects in the Pathway/XM environment.
CPUS ( cpu[:weight] [ , cpu[:weight] ]... )
specifies how the Pathway/XM environment is to balance the load of processes
among CPUs when creating processes. The NODE object must have a minimum of
two CPUs defined.
Processes are assigned in numeric CPU order (of the CPUs specified) according to
the relative weights assigned to each CPU. Two or more NODE objects can specify
the same set of CPUs.
Considerations
•
Changes made by the CONTROL NODE command are recorded in the current
configuration portion of the SuperCTL configuration file. The changed values are
preserved during cool and warm starts; initial attribute values specified for the
configuration are reinstated at the next cold start.
•
If a CPU is removed from a NODE object definition, currently executing processes
continue to run and are stopped when no longer needed. New processes are created
in CPUs according to the new weighted CPUS definition for the NODE object.
CONTROL NODE { node-name | * }
, CPUS ( cpu[:weight] [ , cpu[:weight] ]... )
cpu
is the number of a CPU previously defined for the NODE object.
Valid values are from 0 through 15.
weight
is the percentage of processes that can be executed in the CPU relative
to other CPUs defined for the NODE object. Valid values are from 0
through 100.