IBM 990 - Manual (Page 28)

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zSeries 990 Technical Guide
Capacity Upgrade on Demand (CUoD)
Capacity Upgrade on Demand offers server upgrades via Licensed Internal Code (LIC)
enabling. CUoD can concurrently add processors (CPs, IFLs, ICFs, or zAAPs), and memory
to an existing configuration when no hardware changes are required, resulting in an upgraded
server. Also, I/O features can be added concurrently.
However, adequate planning is required. Proper models and memory card sizes must be
used, and the Plan Ahead feature with concurrent conditioning enablement is recommended
in order to ensure that all required infrastructure components are available.
Customer Initiated Upgrade (CIU)
Customer Initiated Upgrades are Web-based solutions for customers ordering and installing
upgrades via IBM Resource Link and the z990 Remote Support Facility (RSF). A CIU
requires a special contract and registration with IBM. The CIU uses the CUoD function to
allow concurrent upgrades for processors (CPs, IFLs, ICFs, and zAAPs), and memory,
resulting in an upgraded server.
As a CUoD, it also requires proper planning with respect to z990 model and memory card
sizes. CIU is
not available for I/O upgrades.
On/Off Capacity Upgrade on Demand (On/Off CoD)
On/Off Capacity on Demand (On/Off CoD) for z990 gives the customer the ability to
temporarily turn on unowned PUs available within the current model. This capability allows
customers to add capacity (CPs, IFLs, ICFs, and zAAPs) temporarily to meet peak workload
demands.
The customer has to accept contractual terms for On/Off CoD to use this capability; activation
of the additional capacity uses the CIU process. The usage is monitored and customer incurs
additional charges for both the hardware and software until the added capacity is deactivated.
Capacity BackUp (CBU)
Capacity BackUp (CBU) is a temporary upgrade for customers who have a requirement for a
robust disaster/recovery solution. It requires a special contract with IBM. CBU can
concurrently add CPs to an existing configuration when another customer’s servers are
experiencing unplanned outages.
The proper number of CBU features, one for each “backup” CP, must be ordered and
installed to restore the required capacity under disaster situations. The CBU activation can be
tested for disaster/recovery procedures validation and testing.
Since this is a temporary upgrade, the original configuration must be restored after a test or
disaster recovery situation via a concurrent CBU deactivation.
Note: The On/Off CoD capability can coexist with Capacity BackUp (CBU) enablement.
Both On/Off CoD and CBU LIC-CC can be installed on a z990 server, but the On/Off CoD
activation and CBU activation are mutually exclusive.
Note: The CBU capability can coexist with On/Off CoD enablement. Both On/Off CoD and
CBU LIC-CC can be installed on a z990 server, but the On/Off CoD activation and CBU
activation are mutually exclusive.