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

Using iCOD to Manage your Processors
Understanding Online vs. Offline Activation Methods
Chapter 466
Understanding Online vs. Offline Activation
Methods
Online Activation
Mode
Online (dynamic) activation occurs when you activate processors, using
the icod_modify command in either instant or deferred mode, while
HP-UX is running. Online activation is the standard method used to
activate processors.
Offline Activation
Mode
Offline (manual) activation consists of deconfiguring processors that
would otherwise be deactivated and available for online activation.
Offline activation occurs when you activate processors using the
following process:
1. using the icod_modify command to activate processors in deferred
mode
2. shutting down HP-UX on your iCOD system
3. configuring processors from the Boot Console Handler (BCH)
4. reset and boot the system
A reboot is required for offline activation.
Most software applications work fine with the online activation method.
However, some applications erroneously regard inactive processors to be
active processors. These types of applications may exhibit functional or
performance problems. Offline (manual) activation may be necessary for
these types of applications.
You may want to test your application for proper operation in online
activation mode. For information on testing your application, see
“Processor Test Activation on iCOD Systems” on page 69.
If you are not satisfied with your application behavior in the (dynamic)
online activation mode, you may want to switch the iCOD system to
offline (manual) activation mode. For information on configuring your
system in offline activation mode see Appendix A, “Offline Configuration
and Activation of Processors,” on page 109.