Instant Capacity on Demand (iCOD) User's Guide for versions B.05.x

iCOD Compatibility with vPars and Psets
iCOD Compatibility with Virtual Partitions
Chapter 892
Activation and Deactivation of Processors in a vPar
The iCOD software uses the vparmodify command to instantly activate
and deactivate processors. The activations and deactivations are
accomplished by adding and removing unbound processors from a vPar.
NOTE Deferred activations and deactivations are not supported in a vPar
environment.
When you execute the icod_modify command to deactivate a processor,
it determines how many processors in the local vPar are unbound. If
enough unbound processors exist to satisfy the request, the appropriate
vparmodify command is executed, and the proper number of unbound
processors are removed from the local vPar.
When you execute the icod_modify command to activate a processor, it
determines how many processors are available for activation. If enough
processors are available to meet the request, the appropriate
vparmodify command is executed, and the proper number of unbound
processors are added to the local vPar.
Whether you are activating or deactivating processors, the (appropriate)
vparmodify command adjusts only the number of unbound processors,
and it does not explicitly specify certain processors, or affect the number
of bound processors. Any error messages that are output by the
vparmodify command are displayed by the icod_modify command.
Activation or deactivation of processors in a vPar may take one or more
minutes to complete, but is usually no slower than in a non-vPar. See
“Processor Activation or Deactivation Delay with vPars” on page 72 for
details.