Dedicated, shared partitions and IFL upgrade, LP1 LP2

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

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Figure 8-13 Shared logical partitions and zAAP upgrade example

This two-book server configuration has nine CPs and seven spare PUs. The concurrent hardware upgrade adds three zAAP processors, using three available spare PUs on the installed books. There are two activated logical partitions, both running z/OS V1.6 or higher:

LP1 has eight shared (SHR) logical CPs, two reserved CPs and four reserved zAAPs defined.

LP2 has two shared (SHR) logical CPs, one reserved CP and three reserved zAAPs defined.

The z/OS logical partition LP1, which has four reserved zAAPs defined, can configure online all of the three zAAP processors added, remaining with one reserved zAAPs and two reserved CPs for future image upgrades.

The z/OS logical partition LP2, which has three reserved zAAPs defined, is configuring two zAAPs online. After this logical partition upgrade, LP2 remains with one reserved CP and one reserved zAAP for future upgrades.

Dedicated, shared partitions and IFL upgrade

Figure 8-14 on page 214 is an example of a nondisruptive upgrade, adding two Integrated Facility for Linux (IFL) processors to a 2084-B16, software model 309 server.

Chapter 8. Capacity upgrades 213

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.

IBM 990 manual Dedicated, shared partitions and IFL upgrade, LP1 LP2

Models: 990

6947ch08.fm

LP1

LP2

Figure 8-13 Shared logical partitions and zAAP upgrade example

Dedicated, shared partitions and IFL upgrade

Figure 8-14 on page 214 is an example of a nondisruptive upgrade, adding two Integrated Facility for Linux (IFL) processors to a 2084-B16, software model 309 server.

990 specifications