This document provides information on Adabas for zIIP, a selectable unit of Adabas that enables Adabas to make use of IBM’s zIIP engine. Whether running the basic Adabas nucleus, Adabas Cluster Services, or Adabas Parallel Services, Adabas for zIIP enables Adabas on z/OS to offload part of the Adabas workload from the mainframe’s general central processors (GCP) to System z Integrated Information Processors (zIIP).

Offloading work from the GCPs will free up some of their capacity. This helps decrease the total cost of operation (TCO) of the GCPs and makes room for running additional workload on them. Furthermore, the use of Adabas for zIIP may result in performance benefits by increasing the throughput for certain workloads.

Adabas for zIIP supports other selectable units that are integrated into the Adabas nucleus:

• Adabas Caching Facility

• Adabas Cluster Services

• Adabas Delta Save Facility

• Adabas Fastpath

• Adabas Online System

• Adabas Parallel Services

• Adabas SAF Security

• Adabas Transaction Manager

• Adabas Vista

• Event Replicator for Adabas (in Adabas source databases)

Adabas nuclei running with Adabas Review enabled are supported, but the Review subtasks do not currently run on zIIPs. Also, the Adabas Review Hub, the Event Replicator Server (Reptor) and the Adabas utilities do not currently support execution on zIIPs.

This documentation is organized under the following headings:

Prerequisites	Requirements for zIIP support by Adabas.
Current Limitations	Currently limited functionality.
General Information on zIIP Processing	Brief description of zIIP processing.
Adabas for zIIP Processing: Concepts	Explanations of the TCB and SRB processes and the WLM enclaves Adabas requires for zIIP processing.
Monitoring zIIP Usage	System information, reports and statistics available for controlling and evaluating zIIP-enabled Adabas sessions.