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

6947ch08.fm

$.......

Figure 8-9 On/Off CoD order example

This On/Off CoD example is ordering an upgrade from 4 CPs to 5 CPs plus 2 zAAPs to the current server. The maximum number of CPs, ICFs, zAAPs and IFLs is limited by the current number of available spare PUs of the installed books on the z990 server. The upgrade configuration capacity is limited to the double of the current installed capacity, for each individual processor type (CPs, IFLs, ICFs and zAAPs). The total number of zAAPs cannot exceed the total number of CPs plus unassigned CPs on a z990 server.

Activation/Deactivation

When a previously ordered LIC record is retrieved from RETAIN, it is downloaded and immediately activated. The customer does not have the ability to stage the record at their site. When the customer has finished using temporary capacity, they must take action to deactivate the session. This deactivation uses the same facility as CBU undo and is non-disruptive to the customer operation. Depending on the use of the extra capacity, customers may be required to perform tasks at the logical partition level in order to remove the temporary CPs. An example of this would be removal of temporary CPs allocated to a logical partition.

Termination

A customer will be contractually required to terminate the On/Off CoD right to use feature whenever there is a transfer in asset ownership. A customer may also choose to terminate the

Chapter 8. Capacity upgrades 203

Page 216 Page 218
Page 217
Image 217
IBM 990 manual Activation/Deactivation, Termination
Page 216 Page 218

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.
Top Page Image Contents