Availability
z890 Capacity Upgrade on Demand (CUoD)
Capacity Upgrade on Demand allows for the nondisruptive addition of additional Central Processor (CP) Capacity, Internal Coupling Facilities (ICFs), Integrated Facility for Linux (IFLs) and/or IBM ^zSeries Application Assist Processor (zAAP). Capacity Upgrade on Demand can quickly add processors up to the maximum number of available inactive engines. This provides customers with the capacity for much needed dynamic growth in an unpredictable
The CUoD functions are:
•Nondisruptive CP, ICF, IFL, and zAAP upgrades within minutes
•Dynamic upgrade of all I/O cards in the I/O Cage
•Dynamic upgrade of spare installed memory (24 - 32 GB only)
•Plan Ahead and Concurrent Conditioning
Plan Ahead and Concurrent Conditioning
Concurrent Conditioning confi gures a system for hot plugging of I/O based on a future specifi ed target con-
figuration. Concurrent Conditioning of the zSeries I/O is minimized by the fact that all I/O cards plugging into the zSeries I/O cage are hot pluggable. This means that the only I/O to be conditioned is the I/O cage itself. The ques- tion of whether or not to concurrently condition a cage is a very important consideration, especially with the rapid change in the IT environment
The z890 supports concurrent memory upgrade. This capa- bility will allow a processor’s memory to be increased without disrupting the processor operation. To take advantage of this capability, a customer should not plan processor storage on the 8 or 16 GB increments. A customer with a Model A04 with 24 GB of storage will be able to concurrently upgrade to 32 GB as there is spare memory capacity on the card. However, for a customer with 8 or 16 GB of memory installed getting to the next increment would be disruptive.
The Plan Ahead process can easily identify the customer confi guration that is required to meet future needs. The result of concurrent conditioning is a fl exible IT infrastruc- ture that can accommodate unpredictable growth in a low risk, nondisruptive way. Depending on the required Con- current Conditioning, there should be minimal cost associ- ated with dormant z890 capacity. This creates an attractive option for businesses to quickly respond to changing environments, bringing new applications online or growing existing applications without disrupting users.
z890 Server Capacity BackUp (CBU)
Capacity BackUp (CBU) is offered with the z890 servers to provide reserved emergency backup CPU capacity for situations where customers have lost capacity in another part of their establishment and want to recover by adding reserved capacity on a designated z890 server. A CBU system normally operates with a “base” CP confi guration and with a preconfi gured number of additional Processor Units (PUs) reserved for activation in case of an emergency.
The z890 technology is suited for providing capacity backup. The reserved CBU processing units are on the same technol- ogy building block, the MCM, as the regular CPs.
The “base” CBU confi guration must have suffi cient memory and channels to accommodate the potential
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