IBM z/OS - Manual (Page 58)

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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.