IBM 890 manual z/OS.e, Support for 64-bit real memory and 64-bit virtual storage

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

63