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

6947ch08.fm

2084-B16 Model 309

+1 ICF LP1

LP2

LP3

2084-B16 Model 309

+2 ICFs LP1

LP2

LP3

 

 

 

 

 

Book 0

 

 

 

 

 

 

 

 

 

 

 

 

 

Book 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

CP3

CP4

CP5

CP6

CP7

 

CP8

Spare

Spare

Spare

Spare

Spare

Spare

ICF0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical

Logical

Logical

 

Res

Res

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP

CP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DED

DED

DED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical

Logical

Logical

Logical

Logical

Logical

Res

Res

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

CP3

 

CP4

 

 

CP5

 

 

 

 

 

 

 

 

 

 

 

 

 

CP

CP

 

 

 

 

 

 

 

 

 

 

 

 

 

SHR

SHR

SHR

 

SHR

 

SHR

 

 

SHR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Res

Logical

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICF0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Book 0

 

 

 

 

 

 

 

 

 

 

 

 

 

Book 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

CP3

CP4

CP5

CP6

CP7

 

CP8

Spare

Spare

Spare

Spare

Spare

ICF1

ICF0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical

Logical

Logical

 

Res

Res

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CP

CP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DED

DED

DED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical

Logical

Logical

Logical

Logical

Logical

Res

Res

 

 

 

 

 

 

 

 

 

 

 

 

 

CP0

CP1

CP2

 

CP3

 

CP4

 

 

CP5

 

 

 

 

 

 

 

 

 

 

 

 

 

CP

CP

 

 

 

 

 

 

 

 

 

 

 

 

 

SHR

SHR

SHR

 

SHR

 

SHR

 

 

SHR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Logical

Logical

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICF1

ICF0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DED

DED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 8-15 Dedicated, shared logical partitions and ICF upgrade example

This two-book server configuration has nine CPs, one ICF and six spare PUs. The concurrent hardware upgrade adds one more ICF processor, using one available spare PU on the installed books.

There are three activated logical partitions: LP1 has three dedicated (DED) logical CPs and two reserved CPs defined, LP2 has six shared (SHR) logical CPs and two reserved CPs defined, and LP3 is a CF partition with one dedicated (DED) ICF and one reserved ICF defined.

Now let’s see the logical upgrade. LP3 has one reserved ICF defined, and since the server now has one more physical ICF, the reserved ICF can be configured online by the CF image operator function. This CF image is nondisruptively upgraded to two ICFs.

8.6.2 Planning for nondisruptive upgrades

CUoD, CIU, On/Off CoD and CBU can be used to concurrently upgrade a z990 server. But there are some situations that require a disruptive task to use the new capacity just added to the server. Some of these can be avoided if planning is done in advance. Planning ahead is a key factor for nondisruptive upgrades. Refer to Table 6-3, “Minimum z/VM, z/VSE, VSE/ESA, TPF and Linux on zSeries Requirements” on page 148 for more discussion about nondisruptive planning.

Reasons for disruptive upgrades

These are the current main reasons for disruptive upgrades:

Chapter 8. Capacity upgrades 215

Page 228 Page 230
Page 229
Image 229
IBM 990 manual Planning for nondisruptive upgrades, Reasons for disruptive upgrades
Page 228 Page 230

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