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

 

 

 

 

Figure 8-6 CIU order example

The number of CPs, ICFs, zAAPs, IFLs, SAPs, memory size, CBU features, unassigned CPs, and unassigned IFLs (Linux) on the current configuration are displayed on the left side. On the right side are the corresponding updated values of the ordered configuration. This CIU order is requesting a 2084-B16 server upgrade from 3 CPs (software model 303) to 4 CPs (software model 304) plus one IFL, by assigning previously unassigned (but owned) CPs and IFLs (note that the number of unassigned CPs and IFLs decreases).

On processor upgrades, Resource Link will offer the customer the ability to upgrade only to those configurations that are deemed valid by the Order Process, within the already installed number of books.

Note that the CBU features count does not change. It will only be adjusted if the customer creates an order that requires the CBU feature count be decremented because there are no other spare PUs left.

On memory upgrades, Resource Link will retrieve and store relevant data associated with the installed memory cards for the specific server. It will allow you to select only those upgrade options that are deemed valid by the Order Process. Resource Link will only allow the customer to upgrade memory within the given bounds of the currently installed hardware. It will not allow for the ordering of memory or books not attainable within the current configuration.

198IBM eServer zSeries 990 Technical Guide

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IBM 990 manual CIU order example
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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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