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 Using Serviceguard Extension for RAC > Chapter 1 Introduction to Serviceguard Extension for RAC

Serviceguard Extension for RAC Architecture
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This chapter discusses the main software components used by Serviceguard Extension for RAC in some detail. The components are:

  • Oracle Components

    • Custom Oracle Applications

  • Serviceguard Extension for RAC Components

    • Group Membership Services (RAC)

    • Package Manager

    • Cluster Manager

    • Network Manager

  • Operating System

    • Volume Manager Software

    • HP-UX Kernel

Group Membership Daemon

In addition to the Serviceguard daemon processes mentioned in Chapter 3 of Managing Serviceguard, there is another daemon that is used for each version of Oracle to enable communication with Serviceguard Extension for RAC:

  • cmgmsd—Group Membership Daemon for RAC (OPS) 8.1 or later

releases

This HP daemon provides group membership services for Oracle Real Application Cluster 8.1.x. Group membership allows multiple Oracle instances to run on the same cluster node. GMS is illustrated in Figure 1-2 “Group Membership Services”.



What is a Serviceguard Extension for RAC Cluster?
  		 


How Serviceguard Works with Oracle Real Application Clusters  
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