z/OS target system requirements

Prerequisites for configuring and running WebSphere® Application Server for z/OS® application serving environments are listed below.

Hardware requirements

Read the information on the WebSphere Application Server detailed system requirements web page for the complete up-to-date listings of what hardware is required and supported.
Note: If there is a conflict between the information provided in the information center and the information on the supported hardware and software web pages, the information on the website takes precedence. Prerequisites information in the information center is provided as a convenience only.

There are significant performance advantages for those applications doing floating point arithmetic if the machine has binary floating point hardware, such as S/390® Parallel Enterprise Server-Generation 5 and later systems.

See Basic Sizing for WebSphere Application Server on z/OS for a set of basic guidelines for determining how much real storage and DASD storage you might need.

WebSphere Application Server for z/OS is a heavy user of auxiliary storage. You might want to add additional paging volumes before configuring application serving environments.

In addition, you might want to increase your JES spool space if you use WebSphere Application Server for z/OS tracing options to the STDOUT DD dataset.

WebSphere Application Server for z/OS Version 8.0 offers full support for IBM® System z® Application Assist Processors (zAAPs). zAAPs are designed to operate asynchronously with the general purpose processors when executing Java™ programming under control of the IBM JVM. The IBM JVM processing cycles can be executed on the configured zAAPs with no anticipated modifications to the Java applications. The zAAPs may be purchased and installed on z9 – 109, z990, and z890 servers (and follow-on models only). For more details, see the IBM zAAP Redbooks® at http://www.redbooks.ibm.com/abstracts/sg246386.html?Open .

Software requirements

Read the information on the WebSphere Application Server detailed system requirements web page for the complete up-to-date listings of what software is required and supported.
Note: If there is a conflict between the information provided in the information center and the information on the supported hardware and software web pages, the information on the website takes precedence. Prerequisites information in the information center is provided as a convenience only.
You need to enable, and configure the following z/OS elements, features, and components on each z/OS target system. Consult the WebSphere Application Server for z/OS Program Directory and PSP bucket for any additional required corrective service not listed here. In some cases, this corrective service must be installed on each target system for WebSphere Application Server to start.
  • z/OS configured as a sysplex (in the case of a single z/OS system, as a monoplex)

    For details, see z/OS MVS Setting Up a Sysplex.

  • z/OS UNIX® System Services (z/OS UNIX) with an HFS or ZFS file system

    For details, see z/OS UNIX System Services Planning.

  • eNetwork Communications Server (TCP/IP) or equivalent

    In this documentation, we refer to eNetwork Communications Server; but you can substitute an equivalent product.

    For details, see z/OS Communications Server: IP Migration.

  • Resource recovery services (RRS)

    For details, see z/OS MVS Programming: Resource Recovery.

  • System logger

    For details, see z/OS MVS Setting up a Sysplex.

  • A security product such as z/OS Security Server (RACF®)

    In this manual, we refer to Security Server in examples; but you can substitute an equivalent security product.

    For details, see z/OS Security Server RACF Migration.

Additional software might be required to support particular product functions.

All of the z/OS sources referenced are available at this website: http://www.ibm.com/servers/eserver/zseries/zos/bkserv/




Related concepts
Planning for product installation
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