OS Scalability, Bit Support, Automation Support

The IBM JVM processing cycles can be executed on the conﬁ gured zAAPS with no anticipated modiﬁ cations to the Java application(s). Execution of the JVM processing cycles on a zAAP is a function of the Software Developer’s Kit (SDK) 1.4.1 for zSeries, z/OS 1.6, and the Processor Resource/Systems Manager (PR/SM).

z/OS Scalability

z/OS is a highly scalable operating system that can sup- port the integration of new applications with existing mainframe applications and data. z/OS can scale up in a single logical partition, or scale out in a Parallel Sysplex for higher availability. With z/OS 1.6, up to 24 processors are supported in a single logical partition on the z990 server. In previous releases, z/OS supported up to 16 processors. In a Parallel Sysplex, up to 32 z/OS images can be conﬁ g- ured in single-image cluster, with access to shared data.

64-bit Support

z/OS scale is extended with support for 64-bit real and virtual storage on zSeries servers, while continuing to sup- port 24-bit and 31-bit applications.

The 64-bit real support is intended to eliminate expanded storage, helps eliminate paging and may allow you to consolidate your current systems into fewer LPARs or to a single native image. z/OS V1.5 delivers 64-bit shared memory support to allow middleware to share large amounts of 64-bit virtual storage among multiple address spaces. This is expected to provide a signiﬁ cant capac- ity enhancement for relieving shared virtual storage con- straints.

Applications that can be written to 64-bit virtual storage have signiﬁ cantly larger addressability to data. With z/OS 1.2, assembler programs can obtain virtual storage above 2 GB for storing and manipulating data. This 64-bit sup- port is used by DB2 V8 and other middleware. z/OS 1.6 includes C/C++ support for the development of 64-bit applications, including debug and runtime support. In addition, the Java SDK 1.4.1 is also available with 64-bit support.

Automation Support

z/OS Managed System Infrastructure for Operations (msys for Operations) provides automation for single system and sysplex operations to help simplify operations and improve availability. msys for Operations plays an important role in outage avoidance

msys for Operations provides functions that control and manage both hardware and software resources making fully automated solutions possible. The focus is on simpli- fying complicated operator interaction, detecting failure situations and reacting to them quickly and precisely. This is achieved through panel driven operator dialogs and automated recovery routines that run in the background.

Simpliﬁ ed Conﬁ guration z/OS Managed System Infrastruc- ture for Setup (msys for setup) is the strategic solution for product installation, conﬁ guration and function enable- ment. msys for Setup allows usage of consistent interfaces with wizard-like conﬁ guration dialogs. In z/OS 1.4, the msys for Setup Framework was enhanced to provide multi- user capability and improved multisystem support.