How to migrate from single instance to RAC 10gR2

Move from single instance to RAC

1- Install CRS
2- Install new RDBMS binaries rac enable
3- Make sure there is enough space for the new online redo logs for new nodes
4- Make modifications to the pfile for RAC configuration
5- Add the listener configurations to tnsnames file in both nodes
6- Run rconfig or follow instruction on note 208375.1

Some of the steps from note and performed on the PMM RAC conversion:

———- ————————————
3 /u03/oradata/PMMPRD/redo03a.log
3 /u04/oradata/PMMPRD/redo03b.log
2 /u03/oradata/PMMPRD/redo02a.log
2 /u04/oradata/PMMPRD/redo02b.log
1 /u03/oradata/PMMPRD/redo01a.log
1 /u04/oradata/PMMPRD/redo01b.log

6 rows selected.
– Add this to tnsnames.ora file in both nodes

(ADDRESS = (PROTOCOL = TCP)(HOST = calpocpmm01-vip)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = calpocpmm02-vip)(PORT = 1521))
alter database add logfile thread 2
group 4 (‘/u03/oradata/PMMPRD/redo04a.log’,’/u04/oradata/PMMPRD/redo04b.log’) size 500M,
group 5 (‘/u03/oradata/PMMPRD/redo05a.log’,’/u04/oradata/PMMPRD/redo05b.log’) size 500M,
group 6 (‘/u03/oradata/PMMPRD/redo06a.log’,’/u04/oradata/PMMPRD/redo06b.log’) size 500M;

alter database enable public thread 2;
‘/u14/oradata/PMMPRD/undotbs_02_210.dbf’ SIZE 200M ;

mkdir -p /u01/app/oracle/product/10.2.0/pmmprd/admin/PMMPRD/adump
mkdir -p /u01/app/oracle/product/10.2.0/pmmprd/admin/PMMPRD/bdump
mkdir -p /u01/app/oracle/product/10.2.0/pmmprd/admin/PMMPRD/cdump
mkdir -p /u01/app/oracle/product/10.2.0/pmmprd/admin/PMMPRD/udump
mkdir -p /u12/oradata/PMMPRD/flash_recovery_area
SQL> create spfile=’/u02/oradata/spfile_dir/spfilePMMPRD.ora’ from pfile=’/home/oracle/pfile.ora’;

Edit initPMMPRD1.ora and initPMMPRD2.ora

Add database to the CRS
srvctl add database -d PMMPRD -o $ORACLE_HOME
srvctl add instance -d PMMPRD -i PMMPRD1 -n calpmmpoc01
srvctl add instance -d PMMPRD -i PMMPRD2 -n calpmmpoc02


One thought on “How to migrate from single instance to RAC 10gR2

  1. Hi Alex,
    Thanks for publishing this valuable knowledge.
    I want some more support from you regarding my envirnonment.We have single node oracle 10G on one M4000 Solaris server, Recently we are planning to migrate it to 2 new M5000-Solaris RAC nodes. So please suggest me , whether I can follow the above steps or we need some modifications.

    Thanks and Regards

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