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This integrated set of system services in z/OS can help a
customer to focus on extracting the maximum business
value from the z/OS installation. The system manages the
workload, program libraries and I/O devices. Complexities
are designed to be minimized and problem determina-
tion is facilitated with the sophisticated recovery, reporting
and debug facilities of z/OS. The z/OS operating system
combines many features that change the playing fi eld of IT
infrastructure design:
• Support for zSeries Application Assist Processors
(zAAP), an attractively priced special processing unit
that provides an economical z/OS Java language-based
execution environment
• Intelligent Resource Director expands the capabilities of
z/OS Workload Manager to react to changing conditions
and prioritize critical business workloads
•
Support for 64-bit real memory and 64-bit virtual storage
• A new installation and confi guration infrastructure that
simplifi es the installation and confi guration of z/OS and
related products
• Software pricing models designed to support on
demand reality
• z/OS 1.6 is the fi rst release of z/OS that requires the
z/Architecture. This release will only run on zSeries
servers (z890, z990, z800, z990) or equivalent servers.
z/OS.e
z/OS.e unique for the z890 and z800 providing select func-
tion at an exceptional price. z/OS.e is intended to help
customers exploit the fast growing world of on demand
business by making the deployment of new application
workloads on the z890 and z800 very attractively priced.
z/OS.e uses the same code base as z/OS with custom
parameters and invokes an operating environment that is
comparable to z/OS in service, management, reporting,
and reliability. In addition, z/OS.e invokes zSeries hard-
ware functionality just as z/OS does. No new z/OS skills
and service procedures are required for z/OS.e.
z/OS.e is specifi cally for Java, Enterprise Java, C/C++,
and Web-based data transaction processing applications,
giving these workloads a price/performance customers
expect. z/OS.e disables traditional workloads. z/OS.e will
not execute CICS, IMS, COBOL, or FORTRAN applica-
tions. However, precompiled COBOL DB2 stored proce-
dures and other precompiled COBOL applications using
the Language Environment
®
preinitialization interface
(CEEPIPI) are supported. You cannot use the following
compilers: COBOL, PL/I, VisualAge
®
PL/I, and FORTRAN.
However, z/OS.e supports execution of precompiled PL/I
and VisualAge PL/I applications.
At only a fraction of the cost of z/OS, z/OS.e makes the
decision to run new workloads on the mainframe easy
due to its reduced total cost of ownership and exceptional
robustness and functionality. z/OS.e and z890 or z800
server help reduce the total cost of ownership of hardware,
software, people, and environments, making the combina-
tion very cost-effective for new applications.
With very few exceptions, z/OS.e has the same features
and functionality as z/OS. As a result, unless otherwise
specifi ed, z/OS features described herein are applicable
to z/OS.e running on a z890 or z800 server.
Intelligent Resource Director
Intelligent Resource Director (IRD) is a key feature of the
z/Architecture which extends the Workload Manager to
work with PR/SM on zSeries servers to dynamically manage
resources across an LPAR cluster. An LPAR cluster is the
subset of the z/OS systems that are running as LPARs on the
same CEC in the same Parallel Sysplex. Based on business