Oracle 11g - Active Database Duplication Using RMAN

Active Database Duplication Using RMAN Active database duplication is used to copy the live running Database (Target) to the destination instance (Auxiliary) over the network. There is no use of backup at all. RMAN does the following while performing active duplication: Creation of control file on auxiliary database instance. Restart and mount the cloned instance using duplicate control file. Creates duplicate datafiles using target database instance. Recovers datafiles using archived logs. Redo logs cannot be used for recovery as RMAN does not take backup of online redo logs. RMAN can recover up to the last redo log file which was archived.  Finally opens the auxiliary DB in RESETLOGS option.     

Environment Details: Target Database Instance Name Target Server Hostname Auxiliary Database Instance Name Auxiliary Server Hostname

SRDB1 lxsrv11 CLDB1 lxsrv22

In this document Auxiliary database instance (CLDB1) is being duplicated using Target database instance (SRDB1). It is assumed that target database instance (SRDB1) is already setup and running fine. Auxiliary database instance (CLDB1) will be created using RMAN duplicate option by following below step-by-step procedure: 1. Created below directories on host lxsrv22: mkdir mkdir mkdir mkdir mkdir mkdir mkdir mkdir

-p -p -p -p -p -p -p -p

/opt/app/oracle/admin/CLDB1/adump /opt/app/oracle/admin/CLDB1/bdump /opt/app/oracle/admin/CLDB1/cdump /opt/app/oracle/admin/CLDB1/udump /ora/db001/data001/CLDB1 /ora/db001/redo001/CLDB1 /ora/db001/redo002/CLDB1 /ora/db001/dbfra001/CLDB1

2. Create initCLDB1.ora (pfile) on host lxsrv22 with below contents and saved it in $ORACLE_HOME/dbs location: db_name instance_name service_names compatible control_files

= CLDB1 = CLDB1 = CLDB1 = 11.2.0.3 = /ora/db001/data001/CLDB1/control_CLDB1_01.ctl, /ora/db001/redo001/CLDB1/Control_CLDB1_02.ctl, Page 1 of 4

/ora/db001/redo002/CLDB1/Control_CLDB1_03.ctl _trace_files_public = TRUE diagnostic_dest = /opt/app/oracle/admin/CLDB1/bdump core_dump_dest = /opt/app/oracle/admin/CLDB1/cdump db_file_name_convert = ('/ora/db001/data001/SRDB1/','/ora/db001/data001/CLDB1/','/ora/db001/dbfra00 1/SRDB1/','/ora/db001/dbfra001/CLDB1/') log_file_name_convert = ('/ora/db001/redo001/SRDB1/','/ora/db001/redo001/CLDB1/','/ora/db001/redo002 /SRDB1/','/ora/db001/redo002/CLDB1/') remote_login_passwordfile = EXCLUSIVE db_block_size = 8192 db_block_buffers = 10000 shared_pool_size = 224503555 shared_pool_reserved_size = 1048576 java_pool_size = 67108864 log_checkpoint_interval = 10000 log_checkpoint_timeout = 1800 processes = 150 log_buffer = 32768 sort_area_size = 1048576 sort_area_retained_size = 1048576 open_cursors = 2000 nls_date_format = DD-MON-RR db_file_multiblock_read_count = 8 job_queue_processes = 2 utl_file_dir = * timed_statistics = true # if you want timed statistics max_dump_file_size = 10240 # limit trace file size to 5M each hash_area_size = 10485760 audit_file_dest = /opt/app/oracle/admin/CLDB1/adump log_archive_dest_1 = "location=/ora/db001/dbfra001/CLDB1" log_archive_format = arch_CLDB1_%s_%t_%r.arc dml_locks = 100 optimizer_mode = CHOOSE optimizer_index_caching = 90 optimizer_index_cost_adj = 10 audit_trail = DB 3. Ran below commands on host lxsrv22 to set the database & create password file: [oracle@testsrv]$ export ORACLE_SID=CLDB1 [oracle@testsrv]$ export ORACLE_HOME=/opt/app/oracle/product/11.2.0/dbhome_1 [oracle@testsrv]$ orapwd file=/opt/app/oracle/product/11.2.0/dbhome_1/dbs/orapwCLDB1 password=welcome123 4. Create TNS entry for both the databases (SRDB1 and CLDB1) in tnsnames.ora of both the servers (lxsrv11 and lxsrv22 for active database duplication): SRDB1 = (DESCRIPTION = (ADDRESS_LIST = Page 2 of 4

(ADDRESS = (PROTOCOL = tcp) (HOST = lxsrv11.dc.contoso.com) (PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = SRDB1))) CLDB1 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = tcp) (HOST = lxsrv22.dc.contoso.com) (PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = CLDB1))) 5. Register the CLDB1 database name statically in listener.ora file on host lxsrv22: LISTENER = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = CLDB1) (ORACLE_HOME = /opt/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = CLDB1) ) ) 6. Test the connection string for both the servers and databases. Make sure you are able to connect via TNS name from both the databases locally as well as remotely: [oracle@testsrv]$ [oracle@testsrv]$ [oracle@testsrv]$ [oracle@testsrv]$

rman target sys/ welcome123@SRDB1 rman auxiliary sys/ welcome123@CLDB1 sqlplus sys/welcome123@SRDB1 as sysdba sqlplus sys/welcome123@CLDB1 as sysdba

7. Start the auxiliary database instance in NOMOUNT mode using below steps: [oracle@testsrv]$ export ORACLE_SID=CLDB1 [oracle@testsrv]$ export ORACLE_HOME=/opt/app/oracle/product/11.2.0/dbhome_1 [oracle@testsrv]$ sqlplus / as sysdba [oracle@testsrv]$ startup nomount pfile=’ /opt/app/oracle/product/11.2.0/dbhome_1/dbs/initCLDB1.ora’; Verify that the instance is started in nomount mode and exit: SQL> select instance_name, status from v$instance; SQL> exit 8. Connect RMAN using below string: [oracle@testsrv]$ rman target sys/cracker@SRDB1 auxiliary sys/welcome123@CLDB1 Page 3 of 4

RMAN> duplicate target database to CLDB1 from active database; Note: Above command is actually going to perform database duplication and will take time depending on the size of the database, network bandwidth etc. 9. Once the database is created you can rename the datafile in duplicate DB if you wish. To do this first get the database in mount state & use: SQL> host mv /ora/db001/data001/CLDB1/SRDB1system.dbf /ora/db001/data001/CLDB1/CLDB1system.dbf SQL> alter database rename file '/ora/db001/data001/CLDB1/SRDB1system.dbf' to '/ora/db001/data001/CLDB1/CLDB1system.dbf'; Metalink documents referred for troubleshooting the issues encountered: 1. Connection to Auxiliary using connect string failed with ORA-12528 (Doc ID 419440.1) 2. RMAN Duplicate fails to open CLONE with ORA-01139 when the wrong undo tablespace is specified for the auxiliary (Doc ID 1536368.1) 3. How to Recreate a Controlfile (Doc ID 735106.1)

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