Cbu Activation And Deactivation - IBM z13s Technical Manual

Failure to deactivate the CBU feature before the expiration date can cause the system to
degrade gracefully back to its original configuration. The system does
dedicated engines, or the last of in-use shared engines.
Planning: CBU for processors provides a concurrent upgrade, resulting in more enabled
processors, or changed capacity settings available to a z13s configuration, or both. You
decide, at activation time, to activate a subset of the CBU features ordered for the system.
Therefore, more planning and tasks are required for
"Suggestions to avoid disruptive upgrades" on page 353.
For detailed instructions, see the z Systems Capacity on Demand User's Guide,
SC28-6943-01.

8.7.2 CBU activation and deactivation

The activation and deactivation of the CBU function is a customer responsibility, and does not
require the onsite presence of IBM service personnel. The CBU function is activated and
deactivated concurrently from the HMC by using the API. On the SE, CBU is activated either
by using the Perform Model Conversion task or through the API (the API enables task
automation).
CBU activation
CBU is activated from the SE by using the Perform Model Conversion task, or through
automation by using the API on the SE or the HMC. During a real disaster, use the Activate
CBU option to activate the 90-day period.
Image upgrades
After the CBU activation, the z13s server can have more capacity, more active PUs, or both.
The additional resources go into the resource pools, and are available to the LPARs. If the
LPARs must increase their share of the resources, the LPARs' weight can be changed, or the
number of logical processors can be concurrently increased by configuring reserved
processors online.
The OS must have the capability to concurrently configure more processors online. If
necessary, additional LPARs can be created to use the newly added capacity.
CBU deactivation
To deactivate the CBU, the additional resources must be released from the LPARs by the
OSs. In certain cases, releasing resources is a matter of varying the resources offline. In
other cases, it can mean shutting down OSs or deactivating LPARs. After the resources have
been released, the same facility on the SE is used to turn off CBU. To deactivate CBU, click
Undo temporary upgrade from the Perform Model Conversion task on the SE.
CBU testing
Test CBUs are provided as part of the CBU contract. CBU is activated from the SE by using
the Perform Model Conversion task. Select the test option to start a 10-day test period. A
standard contract can support five tests of this type. However, you can order more tests in
increments of one up to a maximum of 15 for each CBU order.
not
deactivate
nondisruptive
logical upgrades. See
Chapter 8. System upgrades
347