This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

About This Guide

The QNX High Availability Toolkit (HAT) Developer's Guide describes the components of the HAT and how to build robust HA-aware software running on the QNX^® Neutrino^® realtime operating system.

The following table may help you find information quickly in this guide:

If you want to:	Go to:
Find the introduction	Introduction
Know the main components of the HAT	What's in the HAT?
Understand the benefits of a software-oriented approach to HA	The QNX Approach to HA
Get an overview of the HAM and Guardian "watchdogs"	Using the High Availability Manager
Find out which standard QNX library functions have HA covers	Using the Client Recovery Library
Look up a convenience function (e.g. ha_recover())	Client Recovery Library Reference
Look up a HAM API function (e.g. ham_attach())	HAM API Reference
See sample code listings for handling various HA scenarios	The Examples appendix
Look up a special term used in this guide	Glossary

For an overview of the QNX^® Neutrino^® RTOS, see the System Architecture manual in the OS documentation set.