Abstract
The IBM Z time synchronization solution uses two technologies to ensure precise, consistent, and resilient timekeeping across IBM Z systems; Server Time Protocol (STP) and External Time Sources (ETS). STP is a server-wide facility that is implemented in the Licensed Internal Code (LIC) of the IBM Z® platform. It provides improved time synchronization in a sysplex or non-sysplex configuration. ETS on IBM Z supports standard protocols like Network Time Protocol (NTP), Precision Time Protocol (PTP), and Pulse Per Second (PPS) to keep accurate universal time.
This IBM Redbooks® publication is intended for infrastructure architects and system programmers who need to understand the STP and ETS functions. Readers are expected to be familiar with IBM Z technology and terminology.
This book provides planning and implementation information for STP and ETS functions and associated software support for the IBM z17™, IBM z16®, and IBM z15® platforms.
Table of Contents
Chapter 1. The critical role of time synchronization in IT systems
Chapter 2. Accurate timekeeping with IBM Z
Chapter 3. CTN configuration and operations
Chapter 4. ETS configuration and operations
Chapter 5. Advanced CTN configurations and time management operations
Special Notices
The material included in this document is in DRAFT form and is provided 'as is' without warranty of any kind. IBM is not responsible for the accuracy or completeness of the material, and may update the document at any time. The final, published document may not include any, or all, of the material included herein. Client assumes all risks associated with Client's use of this document.