Draft Document for Review April 7, 2004 6:15 pm

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CIU may change the server’s software model (3xx) if additional CPs are requested, but it cannot change the z990 server model (2084-xxx).

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.

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 216 for more information.

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, “Minimum z/VM, z/VSE, VSE/ESA, TPF and Linux on zSeries Requirements” 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 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 have a customer secondary order approval to conform to customer operation policies.

Figure 8-4 on page 196 illustrates the simplicity of the CIU ordering process on the IBM Resource Link.

Chapter 8. Capacity upgrades 195

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IBM 990 manual CIU Registration and Agreed Contract for CIU
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990 specifications

The IBM 990 series, often referred to in the context of IBM's pioneering efforts in the realm of mainframe computing, represents a unique chapter in the history of information technology. Introduced in the late 1960s, the IBM 990 series was designed as a powerful tool for enterprise-level data processing and scientific calculations, showcasing the company's commitment to advancing computing capabilities.

One of the main features of the IBM 990 was its architecture, which was built to support a wide range of applications, from business processing to complex scientific computations. The system employed a 32-bit word length, which was advanced for its time, allowing for more flexible and efficient data handling. CPUs in the IBM 990 series supported multiple instructions per cycle, which contributed significantly to the overall efficiency and processing power of the machines.

The technology behind the IBM 990 was also notable for its use of solid-state technology. This provided a shift away from vacuum tube systems that were prevalent in earlier computing systems, enhancing the reliability and longevity of the hardware. The IBM 990 series utilized core memory, which was faster and more reliable than the magnetic drum memory systems that had been standard up to that point.

Another defining characteristic of the IBM 990 was its extensibility. Organizations could configure the machine to suit their specific needs by adding memory, storage, and peripheral devices as required. This modular approach facilitated the growth of systems alongside the technological and operational demands of the business environments they served.

In terms of software, the IBM 990 series was compatible with a variety of operating systems and programming environments, including FORTRAN and COBOL, enabling users to access a broader array of applications. This versatility was a significant advantage, making the IBM 990 an appealing choice for educational institutions, research facilities, and enterprises alike.

Moreover, the IBM 990 was engineered to support multiprocessing, which allowed multiple processes to run simultaneously, further increasing its effectiveness in tackling complex computing tasks.

In summary, the IBM 990 series represents a significant advancement in computing technology during the late 20th century. With a robust architecture, versatile configuration options, and a focus on solid-state technology, the IBM 990 facilitated substantial improvements in data processing capabilities, making it a cornerstone for many businesses and academic institutions of its time. Its impact can still be seen today in the continued evolution of mainframe computing.
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