Simultaneous Usage Reference Manual for z/OS

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Copyright © 2013 Information Builders

This documentation describes how to use centrally controlled FOCUS and XFOCUS databases. It is meant for the FOCUS developer.

References to z/OS apply to all supported versions of the OS/390, z/OS, and MVS operating environments.

The user documentation for FOCUS Version 7.7 is organized to provide you with a useful, comprehensive guide to FOCUS.

Chapters need not be read in the order in which they appear. Though FOCUS facilities and concepts are related, each chapter fully covers its respective topic. To enhance your understanding of a given topic, references to related topics throughout the documentation set are provided. The following pages detail documentation organization and conventions.

How This Manual Is Organized

This manual includes the following chapters:

Chapter/Appendix

Contents

1

Introduction

This chapter introduces the concept of Simultaneous Usage (SU), explains what Simultaneous Usage is, and describes how it works.

2

Operating the FOCUS Database Server

This chapter describes how to operate the FOCUS Database Server. The chapter is addressed to system and database administrators and others who want to operate a server.

3

SU and the FOCUS Language

This chapter discusses reading and modifying centrally controlled databases using the FOCUS language. The chapter is addressed to users and those who design FOCUS requests.

4

SU and the Host Language Interface (HLI)

This chapter describes how to use the FOCUS Host Language Interface (HLI) to read and modify centrally controlled databases.

5

Improving Performance

This chapter is addressed to systems support staff. It contains suggestions for improving Simultaneous Usage performance.

A

FOCUS Error Messages

This appendix explains how to display the text and explanation for any FOCUS error message and lists FOCUS error messages that apply to SU.

B

HLI Status Codes Returned in FCB Word 24

This appendix lists the HLI status codes that can be found in FCB word 24 after an HLI call.

Documentation Conventions

The following table describes the documentation conventions that are used in this manual.

Convention

Description

THIS TYPEFACE

or

this typeface

Denotes syntax that you must enter exactly as shown.

                  this typeface                

Represents a placeholder (or variable) in syntax for a value that you or the system must supply.

                  underscore                

Indicates a default setting.

this typeface

Represents a placeholder (or variable), a cross-reference, or an important term. It may also indicate a button, menu item, or dialog box option that you can click or select.

this typeface

Highlights a file name or command.

Key + Key

Indicates keys that you must press simultaneously.

{  }

Indicates two or three choices. Type one of them, not the braces.

[  ]

Indicates a group of optional parameters. None are required, but you may select one of them. Type only the parameter in the brackets, not the brackets.

|

Separates mutually exclusive choices in syntax. Type one of them, not the symbol.

...

Indicates that you can enter a parameter multiple times. Type only the parameter, not the ellipsis (...).

.

.

.

Indicates that there are (or could be) intervening or additional commands.

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