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

6947ch08.fm

by taking the WASDB workload, and converting it to run both application and data base server in a single Linux image.

The WASDB/L workload is basically the same as the WASDB workload for z/OS, with exception of being enabled for Linux. UDB 7.0 is used instead of DB2 v7.0, and WebSphere AE 4.0.4 is used instead of WebSphere 4.0.1.400.

￿EAS-AS/L (Enterprise Application Solution Application Serving under Linux):

The EAS-AS/L workload reflects the Application Server (AS) portion of the Enterprise Application Solution running in a Linux environment. The AS resides in a Linux on zSeries image while the database server and presentation server reside outboard. The EAS application used for this workload is the SAP R/3 product using DB2 for z/OS. The workload is derived from the SAP AG defined Sales and Distribution (SD) environment, but is not based on SAP AG certified benchmarks results. Specifically, the results show an SAP R/3 AS in 3-tier client/server configuration. The other two tiers, database server and presentation server, are not represented in this data.

This workload is similar to the previous EAS-DB (OS/390 R3-DB) workload description. The software levels used are SuSE Linux Enterprise Server 8 for zSeries and SAP R/3 Release 4.6D.

New predefined z/OS workload mixes

For better accuracy when projecting capacity with LSPR workload data and improved consistency when working across multiple LSPR releases, new predefined z/OS workload mixes are also introduced.

There are six predefined z/OS workload mixes:

￿LSPR-Mix: LSPR generic mix (60% online, 40% other), the default

￿TI-Mix: Transaction intensive mix (60% online, 40% other)

￿TD-Mix: Transaction dominant mix (40% online, 60% other)

￿TM-Mix: Transaction moderate mix (30% online, 70% other)

￿CB-Mix: Commercial batch mix (100% other)

￿LoIO-Mix: Low I/O content (special; for use when less than 30 DASD I/Os/sec per MSU)

Table 8-4 lists the LSPR workload types and percentages used for each predefined z/OS mixed workload.

Table 8-4 New z/OS predefined workload mixes

 

 

 

z/OS Workload Mixes

 

 

Workload type

 

 

 

 

 

 

LSPR-Mix

TI-Mix

TD-Mix

TM-Mix

CB-Mix

LoIO-Mix

 

 

(Default)

 

 

 

 

 

 

 

 

 

 

 

 

CB-L

20%

30%

45%

52.5%

75%

60%

 

 

 

 

 

 

 

CB-S

20%

10%

15%

17.5%

25%

-

 

 

 

 

 

 

 

WASDB

20%

-

-

-

-

20%

 

 

 

 

 

 

 

OLTP-W

20%

30%

20%

15%

-

20%

 

 

 

 

 

 

 

OLTP-T

20%

30%

20%

15%

-

-

 

 

 

 

 

 

 

The new default mixed workload is the LSPR-Mix, which is calculated with equal mix (20%) of CB-L, CB-S, WASDB, OLTP-W and OLTP-T workloads, running under z/OS V1 R4, in LPAR mode.

Chapter 8. Capacity upgrades 227

Page 240 Page 242
Page 241
Image 241
IBM 990 manual New predefined z/OS workload mixes, Oltp-T
Page 240 Page 242

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