Installing Oracle 11g r2 RAC One Node This describes how to create checka rac one node database and how it functions Pre-requisite Set upLinux Serverswith oracle cluster software installed for cluster database and install oracle database software (11.2) (only software without database ). 1.Now start dbca [oracle@racnode1 ~]$ [oracle@racnode1 ~]$ dbca 2.Choose rac one node database 3.Choose create database. 4. Choose the otheroptions as follows choose Admin-managed andproceed with other details for the database and select the hosts you wish to configure for rac onenode. Specify the password. Choose ASM and the disk group click nextand specify fast recovery area location and size. Specifymemory for the database. click finish for the database creation. Database installation is completed. Now check configurations the database [oracle@racnode1 ~]$ srvctl config database -d test Database unique name: test Database name: test Oracle home: /u01/app/oracle/product/11.2.0/dbhome_2 Oracle user: oracle Spfile: +DATA/test/spfiletest.ora Domain:Start options: open Stop options: immediate Database role: PRIMARY Management policy: AUTOMATIC Server pools: test Database instances:Disk Groups: DATA,FRA Mount point paths:Services: test_svc Type: RACOneNode Online relocation timeout: 30 Instance name prefix: test Candidate servers: racnode1,racnode2 Database is administrator managed [oracle@racnode1 ~]$[oracle@racnode1 ~]$ note that online relocation timeout is 30 mins(default) Check the status of the database [oracle@racnode1 ~]$ srvctl status database -d test Instance test_1 is running on node racnode1 Online relocation: INACTIVE [oracle@racnode1 ~]$ Now relocate the database instance [oracle@racnode1 ~]$[oracle@racnode1 ~]$ srvctl relocate database -d test -n racnode2 -w 05 -v Configuration updated to two instances Note : i have given wait time of 5 mins Checkingparallellyin another session [oracle@racnode1 ~]$ srvctl status database -d test Instance test_2 is running on node racnode2 Online relocation: ACTIVE Source instance: test_1 on racnode1 Destination instance: test_2 on racnode2 [oracle@racnode1 ~]$ While checking in the previous session [oracle@racnode1 ~]$[oracle@racnode1 ~]$ srvctl relocate database -d test -n racnode2 -w 05 -v Configuration updated to two instances Instance test_2 started Services relocated Waiting for up to 5 minutes for instance test_1 to stop ... Instance test_1 stopped Configuration updated to one instance [oracle@racnode1 ~]$ Andthe final status [oracle@racnode1 ~]$ srvctl status database -d test Instance test_2 is running on node racnode2 Online relocation: INACTIVE [oracle@racnode1 ~]$ Hope this helps.