Systems Programmer's Guide to: z/OS System Logger

An IBM Redbooks publication

Published 27 July 2007, updated 29 March 2012

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ISBN-10: 0738489433
ISBN-13: 9780738489438
IBM Form #: SG24-6898-01
(340 pages)

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Authors: Frank Kyne, Stephen Anania, Paola Bari, Gianmario Bescape, Jim Grauel, Hiram Neal, Andrew Sica, Bill Stillwell, David Viguers


The z/OS System Logger is a function provided by the operating system to exploiters running on z/OS. The number of exploiters of this component is increasing, as is its importance in relation to system performance and availability. This IBM Redbooks document provides system programmers with a solid understanding of the System Logger component and guidance about how it should be set up for optimum performance with each of the exploiters.

System Logger is an MVS component that provides a logging facility for applications running in a single-system or multi-system sysplex. The advantage of using System Logger is that the responsibility for tasks such as saving the log data (with the requested persistence), retrieving the data (potentially from any system in the sysplex), archiving the data, and expiring the data is removed from the creator of the log records. In addition, Logger provides the ability to have a single, merged, log, containing log data from multiple instances of an application within the sysplex.

Table of contents

Chapter 1. Introduction to System Logger
Chapter 2. System Logger fundamentals
Chapter 3. DFSMStvs and Logger
Chapter 4. IMS Common Queue Server and the System Logger
Chapter 5. CICS and System Logger
Chapter 6. Other Logger exploiters
Chapter 7. Logger operations
Chapter 8. System Logger performance and tuning
Chapter 9. Disaster Recovery considerations
Appendix A. Rebuilding the LOGR Policy
Appendix B. Additional material

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