oracle 10g Dataguard Physical Standby

Subject:
Creating a 10g Data Guard Physical Standby on Linux

PUBLISHED PURPOSE------- This document has been created with step-by-step instructions on how to create a Data Guard Physical Standby environment, derived from the 10G documentation. Although, this setup was tested with Linux, the procedure would be the same for any flavor of Unix.
============ Creating a Physical Data Guard scenario in 10G on Linux.=============================


1. Primary host: stdg2 Standby host: stdg1 Platform: Linux Redhat AS 2.1 Kernel: 2.4.9-e.24 Primary Set up on host stdg2 ORACLE_SID=v10g Initialization parameters (PRIMARY) ========================== *. control_files='/u02/admin/v10g/datafiles/control01.ctl' *.log_archive_config='DG_CONFIG=(v10g_stdg2,v10g_stdg1)' *.log_archive_dest_1='LOCATION=/u02/admin/v10g/v10garch/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES) *.db_unique_name=v10g_stdg2' *.log_archive_dest_2='SERVICE=v10g_stdg1 VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=v10g_stdg1 LGWR ASYNC REOPEN=10' *.log_archive_dest_state_1='enable' *.log_archive_dest_state_2='enable' *.db_unique_name='v10g_stdg2' *.FAL_CLIENT='v10g_stdg2' *.FAL_SERVER='v10g_stdg1' *.standby_archive_dest='/u02/admin/v10g/v10garch' *.standby_file_management='auto' *.remote_login_passwordfile='EXCLUSIVE'


2. Place the primary datbase in ARCHIVELOG mode.
SQL>SHUTDOWN IMMEDIATE SQL>STARTUP MOUNT SQL>ALTER DATABASE ARCHIVELOG; SQL>ALTER DATABASE OPEN; SQL>ARCHIVE LOG LIST;


3. Creating the physical standby. - Take a backup of the primary. (Cold backup was used) - SQL>STARTUP MOUNT (Primary) - SQL>ALTER DATABASE CREATE STANDBY CONTROLFILE AS ‘/STDBY.CTL’; - SQL>ALTER DATABASE OPEN;
- Create a pfile for the standby database
- SQL>CREATE PFILE=’/INITSTDBY.ORA’ FROM SPFILE;
=============Initialization parameter(STANDBY) =================== *.control_files='/u02/admin/v10g/datafiles/standby.ctl'
*.log_archive_config='DG_CONFIG=(v10g_stdg2,v10g_stdg1)' *.log_archive_dest_1='LOCATION=/u02/admin/v10g/v10garch/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES)
*.db_unique_name=v10g_stdg1'
*.log_archive_dest_2='SERVICE=v10g_stdg2 VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=v10g_stdg2 LGWR ASYNC REOPEN=10'
*.log_archive_dest_state_1='enable' *.log_archive_dest_state_2='enable' *.db_unique_name='v10g_stdg1' *.FAL_CLIENT='v10g_stdg1' *.FAL_SERVER='v10g_stdg2' *.standby_archive_dest='/u02/admin/v10g/v10garch' *.standby_file_management='auto' *.remote_login_passwordfile='EXCLUSIVE' Set up the listeners (Net Services) Primary: LISTENER.ORALISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 138.1.137.235)(PORT = 1521)) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = /u01/oracle/product/10g) (PROGRAM = extproc) ) (SID_DESC = (GLOBAL_DBNAME = v10g)(ORACLE_HOME = /u01/oracle/product/10g) (SID_NAME = v10g) )) TNSNAMES.ORA: v10g_stdg1 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 138.1.137.234)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = v10g) ) )v10g_stdg2 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 138.1.137.235)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = v10g) ) NOTE: For the standby make sure you change the ip (HOST) from .234 to .235 appropriately

4. Create the spfile on the standby from the pfile moved from the primary. SQL>CREATE SPFILE=’?/DBS/spfile.ora FROM PFILE=’INITSTDBY.ORA’; SQL>STARTUP MOUNT; SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;


5. Check to see if the redo from the primary is being shipped to the standby On the primary do the following:

- SQL>ALTER SYSTEM SWITCH LOGFILE; - SQl>SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#; SEQUENCE# FIRST_TIM NEXT_TIME ---------- --------- --------- 71 15-AUG-03 15-AUG-03 72 15-AUG-03 15-AUG-03 73 15-AUG-03 15-AUG-03 74 15-AUG-03 15-AUG-03 Physical Standby: SQL>SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#; SEQUENCE# FIRST_TIM NEXT_TIME ---------- --------- --------- 71 15-AUG-03 15-AUG-03 72 15-AUG-03 15-AUG-03 73 15-AUG-03 15-AUG-03 74 15-AUG-03 15-AUG-03

6. Verify if the archived logs are applied successfully on the standby

SQL>SELECT SEQUENCE#,APPLIED FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#; SEQUENCE# APP ---------- --- 68 YES 69 YES 70 YES 71 YES 72 YES 73 YES 74 YES Standby Redo Logs (SRLs)=========================This is similar to redo logs except that a standby log is used only when the database is in standby mode. NOTE: The ARCHIVER (ARCn) or the (LGWR) process on the primary can transmit redo data directly to standby logfile. (The details of SRL's is not discussed in this document) To create a standby logfile: - Stop the redo apply on the standby Alter database recover managed standby database cancel; - Create the SRL’s 3 of them on the standby.
SQL>alter database add standby logfile '/u02/admin/v10g/srldest/srl_1.log' size 10m; - Restart the redo apply;