Architecture considerations and best practices for architecting an Oracle RAC solution with Serviceguard and SGeRAC

Figure 1: Serviceguard Cluster

Serviceguard Extension for RAC

Serviceguard Extension for RAC (SGeRAC) is an add-on product specifically designed for running

Oracle Real Application Clusters (RAC) on a Serviceguard cluster. SGeRAC provides the following

features in the Oracle RAC environment:

• Manages the cluster, including the monitoring of cluster members and hardware and software

components within each node

• Provides the cluster membership to RAC via a standard API defined by Oracle

• Monitors and controls application packages for high availability

• Detects and recovers from network interface card (NIC) failures

• Provides shared storage between nodes via shared volumes and cluster file system

Node A

• All systems are physically connected

to each disk

• Maximum cluster size is 16 nodes

• Each application runs on only one

host at a time

• Hosts can run multiple applications

• Failover is possible to any node that

is physically connected to the data

Storage links

Application

packages

SAN

(switches not shown)

Application

packages

Node B

Application

packages

Node C

2-node cluster

QS Node 1 QS Node 2