IBM z/OS ユーザーズマニュアル

3

Technology has always accelerated the pace of change. 

New technologies enable new ways of doing business, 

shifting markets, changing customer expectations, and 

redefi ning business models. Each major enhancement to 

technology presents opportunities. Companies that under-

stand and prepare for changes can gain advantage over 

competitors and lead their industries. 

Customers of every size, and in every industry are looking 

for ways to make their businesses more resilient in the face 

of change and uncertainty. They want the ability to react to 

rapidly changing market conditions, manage risk, outpace 

their competitors with new capabilities and deliver clear 

returns on investments.

Welcome to the on demand era, the next phase of 

e-business, in which companies move beyond simply 

integrating their processes to actually being able to sense 

and respond to fl uctuating market conditions and provide 

products and services to customers on demand. While the 

former notion of on demand as a utility capability is a key 

component, on demand companies have much broader 

capabilities.

•  Responsive: It can sense and respond in real time to 

the changing needs of customers, employees, suppliers 

and partners 

•  Variable: It must be capable of employing variable cost 

structures to do business at high levels of productivity, 

cost control, capital effi ciency and fi nancial predictability. 

•  Focused: It concentrates on its core competencies – 

areas where it has a differentiating advantage – and 

draws on the skills of strategic partners to manage 

needs outside of these competencies. 

•  Resilient: It can handle the ups and downs of the global 

market, and manage changes and threats with consis-

tent availability, security and privacy – around the world, 

around the clock. 

To support an on demand business, the IT infrastructure 

must evolve to support it. At its heart the data center must 

transition to refl ect these needs; the data center must be 

responsive to changing demands, it must be variable to 

support the diverse environment, it must be fl exible so that 

applications can run on the optimal resources at any point 

in time, and it must be resilient to support an always open 

for business environment.

The on demand era plays to the strengths of the IBM 

^

®  

zSeries

®

. The IBM 

^ zSeries 900 

(z900) was launched in 2000 and was the fi rst IBM server 

"designed from the ground up for e-business." The latest 

member of the family, the IBM 

^ zSeries 990 (z990), 

brings enriched functions that are required for the on 

demand data center. 

The "responsive" data center needs to have systems that 

are managed to the quality of service goals of the business; 

they need systems that can be upgraded transparently 

to the user and they must be adaptable to the changing 

requirements of the business. With the zSeries you have a 

server with high levels of reliability and a balanced design 

to ensure high levels of utilization and consistently high 

service to the user. The capacity on demand features con-

tinue to evolve, helping to ensure that upgrading the servers 

is timely and meets the needs of your business. It’s not 

just the capacity of the servers that can be changed on 

demand, but also the mix of workload and the allocation of 

resources to refl ect the evolving needs and priorities of the 

business.