CUoD for processors, CUoD + 1 CP + 2 IFLs

6947ch08.fm

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

CUoD for processors

CUoD for processors can add, concurrently, more CPs, IFLs, ICFs, and zAAPs to a z990 server by assigning available spare PUs via LIC-CC. Depending on the quantity of the additional CPs, IFLs, ICFs, and zAAPs in the upgrade, additional book(s) may be required and can be concurrently installed before the LIC-CC enablement.

Note: The sum of CPs, unassigned CPs, IFLs, unassigned IFLs, ICFs, and zAAPs cannot exceed 8 PUs per book. The number of zAAPs cannot exceed 4 zAAPs per book. The total number of zAAPs cannot exceed the number of CPs plus unassigned CPs on a z990 server.

Important: CUoD for processors is not supported when CBU or On/Off CoD is activated on a z990 server. CUoD for processors can be applied after the temporary capacity upgrade via CBU or On/Off CoD is deactivated.

Figure 8-1 on page 190 is an example of CUoD for processors, showing the 8 PUs per book that can be assigned as CPs, IFLs, ICFs, or zAAPs.

Book 0

2084-A08 Model 304

CP0	CP1	CP2	CP3	Spare	Spare	Spare	Spare

4 CPs

CUoD

+ 5 CPs

(+ 1 Book)			2084-B16 Model 309
Book 0
Book 0	CP0	CP1	CP2	CP3	CP4	CP5	CP6	CP7
Book 1									9 CPs
	CP8	Spare	Spare	Spare	Spare	Spare	Spare	Spare	9 CPs
	CP8	Spare	Spare	Spare	Spare	Spare	Spare	Spare
CUoD
CUoD
+ 1 CP
+ 2 IFLs			2084-B16 Model 310
Book 0
Book 0	CP0	CP1	CP2	CP3	CP4	CP5	CP6	CP7	10 CPs
									10 CPs
Book 1	CP8	CP9	Spare	Spare	Spare	Spare	IFL1	IFL0	2 IFLs
Book 1	CP8	CP9	Spare	Spare	Spare	Spare	IFL1	IFL0

Figure 8-1 CUoD for processor example

An initial z990 server 2084-A08 (1 book), software model 304 (4 CPs) is concurrently upgraded to a 2084-B16 (2 books), software model 309 (9 CPs). The model upgrade requires adding a book and assigning and activating five PUs as CPs.

190IBM eServer zSeries 990 Technical Guide

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 CUoD for processors, CUoD + 1 CP + 2 IFLs

Models: 990