Integrate an application foundation with z/OS qualities of service

IBM® WebSphere® Application Server for z/OS® helps provide availability and security while reducing costs for business critical applications. It uses the full capabilities of IBM System z® and IBM z/OS® and enables: prioritized workload management, advanced transactional integrity, horizontal and vertical scalability, and data and workload co-location.

WebSphere Application Server for z/OS helps you:

Optimize developer productivity

Deploy and manage applications and services

Improve operations and resiliency

Enhance security and control

WebSphere Application Server for z/OS resources

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WebSphere Application Server for z/OS

Integrate an application foundation with z/OS qualities of service

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System requirements

The minimum operating system and hardware requirements must be met on the server to support the basic installation and use of IBM® WebSphere® Application Server for z/OS. These requirements vary for each version and release. For the details on the software and hardware requirements for all versions, click on the links below.

WAS for z/OS V8.5

Operating System Software Hardware
z/OS See the detailed software requirements See the detailed hardware requirements

WAS for z/OS V8

Operating System Software Hardware
z/OS See the detailed software requirements See the detailed hardware requirements

WAS for z/OS V7

Operating System Software Hardware
AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS See the detailed software requirements See the detailed hardware requirements

WAS for z/OS V6.1

Operating System Software Hardware
z/OS, z/OS.e z/OS 1.6 (5694-A01), z/OS.e (5655-G52), or operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

zSeries® File System (zFS) can be used in addition to the Hierarchical File System (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services

The following z/OS elements, features, and components are optional:

IBM HTTP Server for z/OS or equivalent.

SecureWay® Security Server Lightweight Directory Access Protocol (LDAP) Server.

If your application environment uses a DB2® database, then DB2 Universal Database® (UDB) Server for OS/390® and z/OS, V7 (5675-DB2), or later, is required (may coexist with existing levels of DB2 programs used by other applications). CICS® Transaction Server (CICS TS)

If your application environment uses CICS TS, (5655-147), then CICS TS for OS/390 V2.2, (5697-E93), or later, is required.

If your application environment accesses CICS TS through the CICS Transaction Gateway (CICS TG) for z/OS, then CICS TG V6.0 or V6.1 (5655-M69) is required.

For details, visit

Information Management System (IMS™) — If your application environment accesses IMS through Java DataBase Connectivity (JDBC), or through IMS Connect/Connector for Java, then IMS V8 (5655-C56), or later, and appropriate maintenance is required. If, however, your application environment uses JCA 1.5, then IMS V9 (5655-J38) or later, and appropriate maintenance is required.

For details, visit
Any hardware that supports z/OS 1.6, or later

WAS for z/OS V6.0

Operating System Software Hardware
z/OS, z/OS.e z/OS 1.4 (5694-A01), z/OS.e (5655-G52), or operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services
Any hardware that supports z/OS 1.4, or later

WAS for z/OS V5.1 - Server

Operating System Software Hardware
z/OS, z/OS.e z/OS (5694-A01) 1.2, or later, z/OS.e (5655-G52) 1.3, or later, operating systems

Communications server (TCP/IP) or equivalent

z/OS UNIX® System Services and the hierarchical file system (HFS)

Security Server (RACF®) or equivalent security management product

System logger

System SSL security required when using SSL

Workload management in goal mode

Resource recovery services.
Any hardware that supports z/OS 1.2, or later

WAS for z/OS V5.1 - Client

Operating System Software Hardware
Windows 2000, Windows 95, Windows 98, Windows NT Microsoft® Windows® 2000; Microsoft Windows NT® 4.0 (with server pack 3, or later); Microsoft Windows 95 (with server pack 1 or 2); or Microsoft Windows 98

Optimized for qualities of service

IBM® WebSphere Application Server for z/OS V8.5 is optimized for qualities of service with the tightly integrated pairing of IBM System z and the z/OS operating system. This version extends the functional equivalency of WebSphere Application for Network Deployment with enhanced capabilities for resiliency, workload management and advanced transaction integrity. V8.5 includes both the enhanced, lightweight Liberty profile and the full profile WebSphere Application Server for enabling unlimited load balancing across the server.

WebSphere Application Server for z/OS V8.5 has been enhanced with additional capabilities delivered in the service stream for V8.5, providing WebSphere Application Server for z/OS enhancements corresponding to WebSphere Application Server Network Deployment V8.5.5.

Liberty profile enhancements:

Full profile enhancements:

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