IBM 990 User Manual
Page 209
Chapter 8. Capacity upgrades
197
Additional logical processors can be concurrently configured online to logical partitions by the
operating system when reserved processors are previously defined, resulting in image
upgrades. The operating system must have the capability to concurrently configure more
processors online.
Software charges based on the total capacity of the server on which the software is installed
are adjusted to the new capacity in place after the CIU upgrade. See Table 6-3 on page 148
to check software implications for CIU.
Software products using Workload License Charge (WLC) may not be affected by the server
upgrade, as their charges are based on a partition’s utilization and not based on the server
total capacity. See 6.8, “Workload License Charges” on page 150 for more information about
WLC.
CIU registration and agreed contract for CIU
Before customers are able to use the CIU function, they have to be registered. Once they are
registered, customers gain access to the CIU application by ordering the CIU Registration
feature from their sales person.
This capability requires a CIU contract, which gives huge benefits to the customer because
the upgrade can happen much faster than waiting for a normal MES to be processed. It
allows the customer to be ready to accommodate new workload peaks in a very timely
manner.
Ordering and activation of the upgrade is accomplished by the customer logging on to IBM
Resource Link and executing the CIU application to upgrade a machine for CPs, ICFs, IFLs,
zAAPs, and/or memory. It is possible to require a customer secondary order approval to
conform to customer operation policies.
Figure 8-4 on page 198 illustrates the simplicity of the CIU ordering process on the IBM
Resource Link.
Note:
CIU for processors provides a “physical” concurrent upgrade, resulting in more
enabled processors available to a server configuration. Thus, additional planning and
tasks are required for
nondisruptive
“logical” upgrades. See “Recommendations to avoid
disruptive upgrades” on page 217 for more information.