Using Serviceguard Extension for RAC, 6th Edition, April 2008

1 Introduction to Serviceguard Extension for RAC
Serviceguard Extension for RAC (SGeRAC) enables the Oracle Real Application Cluster
(RAC), formerly known as Oracle Parallel Server RDBMS, to run on HP high availability
clusters under the HP-UX operating system. This chapter introduces Serviceguard
Extension for RAC and shows where to find different kinds of information in this book.
The following topics are presented:
• “What is a Serviceguard Extension for RAC Cluster? ”
• “Serviceguard Extension for RAC Architecture”
• “Overview of SGeRAC and Cluster File System (CFS)/Cluster Volume Manager
(CVM)”
• “Overview of SGeRAC and Oracle 10g RAC”
• “Overview of SGeRAC Cluster Interconnect Subnet Monitoring ”
• “Overview of SGeRAC and Oracle 9i RAC”
• “Node Failure”
• “Larger Clusters ”
• “Extended Distance Cluster Using Serviceguard Extension for RAC”
What is a Serviceguard Extension for RAC Cluster?
A high availability cluster is a grouping of HP servers having sufficient redundancy
of software and hardware components that a single point of failure will not disrupt
the availability of computer services. High availability clusters configured with Oracle
Real Application Cluster software are known as RAC clusters. Figure 1-1 shows a very
simple picture of the basic configuration of a RAC cluster on HP-UX.
What is a Serviceguard Extension for RAC Cluster? 21