HP Serviceguard Extension for RAC (SGeRAC) manual RAC Instances, Network Monitoring

Manual Startup and Shutdown

Manual listener startup and shutdown is supported through the following commands: srvctl and lsnrctl.

Network Monitoring

SGeRAC cluster provides network monitoring. For networks that are redundant and monitored by Serviceguard cluster, Serviceguard cluster provides local failover capability between local network interfaces (LAN) that is transparent to applications utilizing User Datagram Protocol (UDP) and Transport Control Protocol (TCP).

Virtual IP addresses (floating or package IP address) in Serviceguard provide remote failover capability of network connection endpoints between cluster nodes, and transparent local failover capability of network connection endpoints between redundant local network interfaces.

NOTE: Serviceguard cannot be responsible for networks or connection endpoints that it is not configured to monitor.

SGeRAC Heartbeat Network

Serviceguard supports multiple heartbeat networks, private or public. Serviceguard heartbeat network can be configured as a single network connection with redundant LAN or multiple connections with multiple LANs (single or redundant).

CSS Heartbeat Network

The CSS IP addresses for peer communications are fixed IP addresses. When CSS heartbeats are on a single network connection it does not support multiple heartbeat networks. To protect against a network single point of failure, the CSS heartbeat network should be configured with redundant physical networks under SGeRAC monitoring. Since SGeRAC does not support heartbeat over Hyperfabric (HF) networks, the preferred configuration is for CSS and Serviceguard to share the same cluster interconnect.

RAC Cluster Interconnect

Each set of RAC instances maintains peer communications on a single connection and may not support multiple connections on HP-UX with SGeRAC. To protect against a network single point of failure, the RAC cluster interconnect should be configured with redundant networks under Serviceguard monitoring and for Serviceguard to take action (either a local failover or an instance package shutdown, or both) if the RAC cluster interconnect fails. Serviceguard does not monitor Hyperfabric networks directly (integration of Serviceguard and HF/EMS monitor is supported).

Public Client Access

When the client connection endpoint (virtual or floating IP address) is configured using Serviceguard packages, Serviceguard provides monitoring, local failover, and remote failover capabilities. When Serviceguard packages are not used, Serviceguard does not provide monitor or failover support.

RAC Instances

Automated Startup and Shutdown

CRS can be configured to automatically start, monitor, restart, and halt RAC instances. If CRS is not configured to automatically start the RAC instance at Oracle Cluster Software startup, the RAC instance startup can be automated through scripts using supported commands—such as srvctl or sqlplus, in an SGeRAC package to start and halt RAC instances.

NOTE: srvctl and sqlplus are Oracle commands.

28 Serviceguard Configuration for Oracle 10g, 11gR1, or 11gR2 RAC