Dedicated and shared logical partitions upgrade

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

6947ch08.fm

Partition LP1 has two reserved CPs defined and, if the operating system running on it has the capability of configuring processors online, this partition can be nondisruptively upgraded to nine CPs, as shown in this example.

Partition LP2 has no reserved CPs, so it cannot be nondisruptively upgraded. If any upgrade for this partition is required, it will require deactivation to configure more CPs.

Dedicated and shared logical partitions upgrade

Figure 8-12 shows a 2084-B16, software model 309 server. This two-book server configuration has nine CPs and seven spare PUs.

Book 0

Book 1

2084-B16 Model 309

LP1

LP2

LP3

CP0

CP1

CP2

CP3

CP4

CP5

CP6

CP7

CP8

Spare

Logical

Res

CP0

CP1

CP2

DED

Logical

Res

CP0

CP1

CP2

CP3

CP4

CP5

SHR

Logical

Res

CP0

CP1

CP2

CP3

CP4

CP5

SHR

Book 0

Book 1

2084-B16 Model 311

LP1

LP2

LP3

CP0

CP1

CP2

CP3

CP4

CP5

CP6

CP7

CP8

CP9

CP10

Spare

Logical

Res

CP0

CP1

CP2

CP3

DED

Logical

Res

CP0

CP1

CP2

CP3

CP4

CP5

CP6

SHR

Logical

Res

CP0

CP1

CP2

CP3

CP4

CP5

SHR

Figure 8-12 Dedicated and shared logical partitions upgrade example

This 2084-B16, software model 309 (with no ICFs or IFLs) can be concurrently upgraded to the software model 316 via LIC-CC, with no model upgrade.

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 also has six shared (SHR) logical CPs and two reserved CPS defined.

This example shows an upgrade to the 2084-B16, software model 311, by adding concurrently two more CPs to the physical configuration. Two available spare PUs are used by LIC-CC for this upgrade. The physical upgrade ends here.

Chapter 8. Capacity upgrades 211

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 and shared logical partitions upgrade, LP1 LP2 LP3

Models: 990

6947ch08.fm

Dedicated and shared logical partitions upgrade

Figure 8-12 shows a 2084-B16, software model 309 server. This two-book server configuration has nine CPs and seven spare PUs.

Book 0

2084-B16 Model 309

LP1

LP2

LP3

Figure 8-12 Dedicated and shared logical partitions upgrade example

990 specifications