System z Application Assist Processor (zAAP)

Today's reality

Today, business requirements change more frequently than ever. To stay current and competitive, businesses are developing new strategic web-based applications, but these applications typically require more IT resources than traditional applications due to levels of abstraction, code generation, and reuse.

What it does

The IBM System z Application Assist Processors (zAAPs) is available on all
IBM zEnterprise EC12, IBM zEnterprise, IBM System z10, and IBM System z9 servers. The zAAP specialty engine provides an attractively priced execution environment for web-based applications and SOA-based technologies, such as:

See the following page about Intended future support for zAAP processors

What it means


For Java workloads, zAAPs may enable customers to:

When configured with general purpose processors within logical partitions running z/OS, zAAPs may help increase general purpose processor productivity and may contribute to lowering the overall cost of computing for z/OS Java technology-based applications. zAAPs are designed to operate asynchronously with the general processors to execute Java programming under control of the IBM Java Virtual Machine (JVM). This can help reduce the demands and capacity requirements on general purpose processors which may then be available for reallocation to other mainframe workloads.

The IBM JVM processing cycles can be executed on the configured zAAPs with no anticipated modifications to the Java application(s).

The amount of general purpose processor savings will vary based on the amount of Java application code executed by zAAP(s). This is dependent upon the amount of Java cycles used by the relevant application(s) and on the zAAP execution mode selected by the customer.

Execution of the Java applications on zAAPs, within the same z/OS SMP LPAR as their associated database subsystems, can also help simplify the server infrastructures and improve operational efficiencies. For example, use of zAAPs could reduce the number of TCP/IP programming stacks, firewalls, and physical interconnections (and their associated processing latencies) that might otherwise be required when the application servers and their database servers are deployed on separate physical server platforms.

IBM does not impose software charges on zAAP capacity. Additional IBM software charges apply only when additional general purpose CP capacity is used. Customers are encouraged to contact their specific ISVs/USVs directly to determine if their charges will be affected.

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IBM provides world-class IBM mainframe technology to help today's enterprises respond quickly to evolving business conditions and with extreme flexibility. From automation to advanced virtualization technologies and open industry standards, IBM mainframes help deliver competitive advantages for enterprises contributing and succeeding on a smarter planet.

Operating Systems

IBM System z supports multiple operation systems:


IBM's technology, solutions and industry expertise can help you find the competitive edge with a sharper understanding of your customers. Our System z solutions combine the foundation of IBM hardware, software and middleware with flexible financing and packaging options to help your business meet and overcome the challenges of doing business in the on demand world. IBM can help you develop a customer-centric view—and assist you in delivering the right solution and the right products.