WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

► Reduced cost through lowest Total Cost of Ownership (TCO) in the market
System z is well known for to have the best TCO in the IT market.
Independent consulting companies have shown that the usage of a modern
mainframe will outperform distributed environments that may be cheap to
purchase but more expensive to maintain. WebSphere can fully exploit
features like the System z Application Assist Processor (zAAP) to reduce the
software cost and the overall cost of the environment.
► Secure environment to stabilize operations and production
The usage of a central security repository, the z/OS Resource Access Control
Facility (RACF) will ease the security model, because it can be used for user
authentication, authorization, and the role-based security model offered by
Java.
The security model of the operating system prevents unauthorized user code
to harm the system and bringing down your environment.
14.1.2 Common concepts
Before we explain the enhancements, we introduce some commonalities to both
implementations of the WebSphere Application Server V7.0:
► All WebSphere Application Server components described in this book are
common to both distributed and z/OS platform. This includes nodes, cells,
clusters, core groups, job manager, administrative agent, deployment
manager, administrative console, and all the other components.
► Experience has shown that applications that run inside a WebSphere
Application Server on Windows, AIX, Linux, Solaris, and so forth can also run
on WebSphere Application Server for z/OS, if the application meets the
requirements common to the product. Some minor modifications might be
required when changing the underlying operating system.
► WebSphere Application Server administrators will find the usual control
options and Web interfaces on z/OS (except the update installer).
z/OS as the operating system for WebSphere Application Server:
Using z/OS as the underlying operating system for WebSphere Application
Server does not mean rebuilding your processes for administration,
operation, and development, or that your administration staff needs to
learn a new product.
The WebSphere API’s are the same, while the z/OS operating systems
offers additional capabilities that simplifies things and provides
high-availability, disaster recovery, performance settings, and management
options.
Chapter 14. WebSphere Application Server for z/OS 421