IBM z13s, Техническое руководство

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Chapter 8. System upgrades
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one be stopped before the inactive one can be activated. This operation decreases the
current capacity during the change.
The provisioning management routines can interrogate the installed offerings, their content,
and the status of the content of the offering. To avoid the decrease in capacity, only create
one On/Off CoD offering on the zBC12 by specifying the maximum possible capacity. The
CPM can then, at the time that an activation is needed, activate a subset of the contents of
the offering sufficient to satisfy the demand. Later, if more capacity is needed, the CPM can
activate more capacity up to the maximum supported in the offering.
Having an unlimited number of offering records pre-staged on the SE hard disk is possible.
Changing the content of the offerings if necessary is also possible.
In a situation where a CBU offering is active on a z13s server, and that CBU offering is 100%
or more of the base capacity, activating any On/Off CoD is not possible. The On/Off CoD
offering is limited to 100% of the base configuration.
The CPM operates based on WLM indications, and the construct used is the PI of a service
class period. It is important to select service class periods that are appropriate for the
business application that needs more capacity.
For example, the application in question might be running through several service class
periods, where the first period might be the important one. The application might be defined
as importance level 2 or 3, but it might depend on other work running with importance level 1.
Therefore, determining which workloads to control and which service class periods to specify
is important.
8.6 Capacity for Planned Event
CPE is offered with z13s servers to provide replacement backup capacity for planned
downtime events. For example, if a server room requires an extension or repair work,
replacement capacity can be installed temporarily on another z13s server in your
environment.
CPE has these feature codes:
򐂰 FC 6833: Capacity for Planned Event enablement
򐂰 FC 0116: 1 CPE Capacity Unit
򐂰 FC 0117: 100 CPE Capacity Unit
򐂰 FC 0118: 10000 CPE Capacity Unit
Important: The CPM has control over capacity tokens for the On/Off CoD records. In a
situation where a capacity token is completely consumed, the z13s server deactivates the
corresponding offering record.
Therefore, prepare routines for detecting the warning messages about capacity tokens
being nearly consumed, and have administrative routines in place for these situations. The
messages from the system begin five days before a capacity token is fully used. To avoid
capacity records from being deactivated in this situation, replenish the necessary capacity
tokens before they are completely consumed.
Important: CPE is for planned replacement capacity only, and
cannot
be used for peak
workload management.