Sample Configurations with SGeRAC and Oracle RAC 10gR2, March 2009

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• OCR – Oracle Cluster Registry is shared storage used to keep Oracle cluster and
configuration information.
• ODM – Oracle Disk Manager is a standard API specified by Oracle for database I/O.
• RAC – Real Application Cluster enables a multi-instances concurrent shared access database.
• RAC-DB-IC – Real Application Cluster Interconnect traffic for both Global Cache Service and
Global Enqueue Service.
• RAID – Redundant Array of Independent Disks refers to disk storage that provides HA through
redundancy within an array of disks by internal mirroring or use of parity disks.
• RIP – Serviceguard Relocatable IP Address user for client application access and failovers
with package
• SG-HB – Serviceguard Heartbeat traffic.
• SGeRAC – Serviceguard Extension for RAC extends Serviceguard to support Oracle RAC.
• SLVM – Shared Logical Volume Manger allows multi-system shared access to LVM volumes for
RAC.
• VIP – Virtual IP address is used by OC to configure access to Oracle clients and for remote
failover to reject client connections.
• Voting Disk – Shared storage used by Oracle Clusterware as vote tie breaker and for disk
based heartbeat.
Additional information
The audience is encouraged to use these additional documentations in conjunction with this
document. Sources are listed in the For More Information section.
• HP Serviceguard Storage Management Suite Version Release Notes
• Serviceguard Version A.11.19 Release Notes
• Serviceguard Extension for RAC Version A.11.19 Release Notes
• Managing Serviceguard Sixteenth Edition
• Using Serviceguard Extension for RAC Manual Sixth Edition
• Oracle Clusterware and Oracle Real Application Clusters Installation Guide version 10g
Release 2 (10.2)
• Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment
Guide version 10g Release 2 (10.2)
• Symantec Veritas Storage Foundation 5.0 for Oracle RAC Configuration Guide Extracts for
HP Serviceguard Storage Management Suite Extracts
• Symantec Veritas Storage Foundation 4.1 for Oracle RAC HP Serviceguard Storage
Management Suite Extracts
Planning considerations
Proper planning is a requirement for high availability configurations. There are important
considerations when deciding the cost-benefit tradeoffs.
Capacity planning
Proper capacity planning ensures sufficient resources are available to meet the expected service
levels.
Processor capacity
In a cluster environment, cluster members maintain heartbeat traffic between nodes. Insufficient CPU
processing capacity affects heartbeat processing and thus affects the heartbeat timeout. A larger
timeout means a longer cluster reconfiguration time and a longer time before a node failure or
network failure can be detected.