IBM z15 (8561) Technical Guide

A draft IBM Redbooks publication

Updated 24 October 2019

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ISBN-10: 0738458120
ISBN-13: 9780738458120
IBM Form #: SG24-8851-00
(513 pages)

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Authors: Octavian Lascu, John Troy, Jannie Houlbjerg, Frank Packheiser, Paul Schouten, Kazuhiro Nakajima, Anna Shugol, Hervey Kamga, Bo XU


This IBM® Redbooks® publication describes the features and functions the latest member of
the IBM Z® platform, the IBM z15 (machine type 8561). It includes information about the IBM
z15 processor design, I/O innovations, security features, as well as supported Operating
The z15 is a state-of-the-art data and transaction system that delivers advanced capabilities,
which are vital to any digital transformation. The z15 is designed for enhanced modularity,
which is in an industry standard footprint.
This book explains how this system uses new innovations and traditional Z strengths to
satisfy growing demand for cloud, analytics, and open source technologies. With the z15 as
the base, applications can run in a trusted, reliable, and secure environment that improves
operations and lessens business risk.

Table of contents

Chapter 1. Introduction
Chapter 2. Central processor complex hardware components
Chapter 3. Central Processor Complex Design
Chapter 4. Central Processor Complex I/O Structure
Chapter 5. Central processor complex channel subsystem
Chapter 6. Cryptographic features
Chapter 7. Operating System Support
Chapter 8. System Upgrades
Chapter 9. Reliability, availability, and serviceability (RAS)
Chapter 10. Hardware Management Console and Support Element
Chapter 11. Environmentals
Chapter 12. Performance
Appendix A. Channel Options
Appendix B. System Recovery Boost
Appendix C. IBM Integrated Accelerator
Appendix D. Frame configurations

These pages are Web versions of IBM Redbooks- and Redpapers-in-progress. They are published here for those who need the information now and may contain spelling, layout and grammatical errors. This material has not been submitted to any formal IBM test and is published AS IS. It has not been the subject of rigorous review. Your feedback is welcomed to improve the usefulness of the material to others.

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