Oracle Option: Real Application Clusters (RAC)

In a RAC environment, each participating instance and ASM have their own ADR home.

Is background process LMON running:

$ ps -ef | grep lmon | grep $ORACLE_SID

Does SQL*Plus show Real Application Clusters in its banner when started up?

Is the value of the init paramter cluster_database = true (note that during a maintenance period, the value may be false even though its a RAC instance)j.wj

The following shell command checks if the RAC option is linked. If it does not return anything, it is not linked, otherwise, it prints kcsm.o:

$  ar -t $ORACLE_HOME/rdbms/lib/libknlopt.a | grep kcsm.o

RAC One Node

Oracle database options

Dictionary views for RAC are created with catclust.sql

gv$ views.

There is also the object type cluster which must be distinguished from RAC.