HP Serviceguard Extension for RAC (SGeRAC) manual Interface Areas, Group Membership API NMAPI2

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

This chapter shows the additional planning and configuration that is needed to use Oracle Real Application Clusters 10g/11gR1/11gR2 with Serviceguard. The following topics are presented:

•“Interface Areas” (page 25)

•“Oracle Cluster Software” (page 26)

•“Planning Storage for Oracle Cluster Software” (page 30)

•“Planning Storage for Oracle 10g/11gR1/11gR2 RAC” (page 30)

•“Installing Serviceguard Extension for RAC ” (page 33)

•“Installing Oracle Real Application Clusters” (page 47)

•“Cluster Communication Network Monitoring” (page 35)

•“Creating a Storage Infrastructure with LVM” (page 40)

•“Creating a Storage Infrastructure with CFS” (page 47)

•“Creating a Storage Infrastructure with CVM” (page 52)

•“Installing Oracle 10g, 11gR1, or 11gR2 Cluster Software” (page 62)

Interface Areas

This section documents interface areas where there is expected interaction between SGeRAC, Oracle 10g/11gR1/11gR2 Cluster Software, and RAC.

Group Membership API (NMAPI2)

The NMAPI2 client links with the SGeRAC provided NMAPI2 library for group membership service. The group membership is layered on top of the SGeRAC cluster membership where all the primary group members are processes within cluster nodes. Cluster membership has node names and group membership has process names. Upon an SGeRAC group membership change, SGeRAC delivers the new group membership to other members of the same group.

SGeRAC Detection

When Oracle 10g/11gR1/11gR2 Cluster Software is installed on an SGeRAC cluster, Oracle Cluster Software detects the existence of SGeRAC, and CSS uses SGeRAC group membership.

Cluster Timeouts

SGeRAC periodically check heartbeat member timeouts to determine when any SGeRAC cluster member has failed or when any cluster member is unable to communicate with the other cluster members. CSS uses a similar mechanism for CSS memberships. Each RAC instance group membership also has a member timeout mechanism, which triggers Instance Membership Recovery (IMR).

NOTE: HP and Oracle support SGeRAC to provide group membership to CSS.

Serviceguard Cluster Timeout

The Serviceguard cluster heartbeat timeout is set according to user requirements for availability. The Serviceguard cluster reconfiguration time is determined by the cluster timeout, configuration, the reconfiguration algorithm, and activities during reconfiguration.

Interface Areas 25