Data Guard Project Details

7/27/2019 Data Guard Project Details

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This document explains the step by step process of Configuring 10g R2Single Instance Data guard for Single Instance Primaryon RedHat Enterprise Linux 32 bit (RHEL3) / Cantos 3.6.

Click HERE for Step By Step Process of Configuring RAC Standby

Data guard for RAC Primary ON Redhat Linux.

Task List:10g R2 Data guard Technical Architecture

Primary DB init parameter

Standby DB init parameter

Enable Archiving On Primary DB

tnsnames.ora/listener.ora configuration

Creating Standby Redo logs (SLRs)

Backup the Primary DB.Creating the standby control file

Startig and verifying Standby DB

Testing Realtime Apply

Technical Architecture of DataGuard

Primary Database Name: primaryService Name: primaryPrimary Node:

SID: primaryNetwork name (hostname): node1-prvORACLE_BASE: /u01/app/oracle

Standby Database Name: stndbyService Name: stndbyStandby Node:

SID: stndbyNetwork name (hostname): node2-prvORACLE_BASE: /u01/app/oracle

Primary DB init parameter

primary.__db_cache_size=67108864primary.__java_pool_size=4194304primary.__large_pool_size=4194304primary.__shared_pool_size=88080384primary.__streams_pool_size=0*.archive_lag_target=0*.audit_file_dest='/u01/app/oracle/admin/primary/adump' *.background_dump_dest='/u01/app/oracle/admin/primary/bdump' *.compatible='10.2.0.1.0'
http://www.oracledba.org/10g/dr/10gR2_dataguard_RAC_to_RAC.htmlhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Technical_Architecture_of_DataGuard%23Technical_Architecture_of_DataGuardhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Primary_DB_init_parameter%23Primary_DB_init_parameterhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Standby_DB_init_parameter%23Standby_DB_init_parameterhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Enabling_Archiving_on_primary_DB:%23Enabling_Archiving_on_primary_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#tnsnameslistener.ora_configuration:%23tnsnameslistener.ora_configuration:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Standby_Redo_Logs_SLRs_Creation:%23Standby_Redo_Logs_SLRs_Creation:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Backup_the_primary_DB:%23Backup_the_primary_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Create_the_Standby_Controlfile:%23Create_the_Standby_Controlfile:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Starting_and_Verifying_the_standby_DB:%23Starting_and_Verifying_the_standby_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Testing_Realtime_Apply:%23Testing_Realtime_Apply:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Technical_Architecture_of_DataGuard%23Technical_Architecture_of_DataGuardhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Primary_DB_init_parameter%23Primary_DB_init_parameterhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Standby_DB_init_parameter%23Standby_DB_init_parameterhttp://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Enabling_Archiving_on_primary_DB:%23Enabling_Archiving_on_primary_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#tnsnameslistener.ora_configuration:%23tnsnameslistener.ora_configuration:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Standby_Redo_Logs_SLRs_Creation:%23Standby_Redo_Logs_SLRs_Creation:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Backup_the_primary_DB:%23Backup_the_primary_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Create_the_Standby_Controlfile:%23Create_the_Standby_Controlfile:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Starting_and_Verifying_the_standby_DB:%23Starting_and_Verifying_the_standby_DB:http://www.oracledba.org/10g/dr/10gR2_dataguard_on_Linux.html#Testing_Realtime_Apply:%23Testing_Realtime_Apply:http://www.oracledba.org/10g/dr/10gR2_dataguard_RAC_to_RAC.html


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*.control_files='/u01/app/oracle/oradata/PRIMARY/controlfile/o1_mf_26lg83r9_.ctl','/u01/app/oracle/flash_recovery_area/PRIMARY/controlfile/o1_

mf_26lg844c_.ctl'*.core_dump_dest='/u01/app/oracle/admin/primary/cdump' *.db_block_size=8192*.db_create_file_dest='/u01/app/oracle/oradata' *.db_domain=''*.db_file_multiblock_read_count=16 *.db_name='primary'*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area' *.db_recovery_file_dest_size=2147483648 *.db_unique_name='primary'*.dg_broker_start=TRUE*.dispatchers='(PROTOCOL=TCP) (SERVICE=primary)'*.fal_client='primary'*.fal_server='stndby'*.job_queue_processes=10*.log_archive_config='DG_CONFIG=(primary,stndby)' *.log_archive_dest_1='LOCATION=/u01/app/oracle/oradata/PRIMARY/archVALID_FOR=(ALL_LOGFILES,ALL_ROLES)

DB_UNIQUE_NAME=primary'*.log_archive_dest_2='SERVICE=stndby LGWR ASYNCVALID_FOR=(ALL_LOGFILES,PRIMARY_ROLE)DB_UNIQUE_NAME=stndby'

*.log_archive_dest_state_1='ENABLE' *.log_archive_dest_state_2='ENABLE' *.log_archive_format='%t_%s_%r.dbf'

primary.log_archive_format='%t_%s_%r.dbf'*.log_archive_max_processes=2*.log_archive_min_succeed_dest=1

primary.log_archive_trace=0*.open_cursors=300*.pga_aggregate_target=16777216*.processes=150*.remote_login_passwordfile='EXCLUSIVE' *.sga_target=167772160

primary.standby_archive_dest='/u01/app/oracle/oradata/PRIMARY/arch '*.standby_file_management='AUTO'*.undo_management='AUTO'*.undo_tablespace='UNDOTBS1'*.user_dump_dest='/u01/app/oracle/admin/primary/udump' *.local_listener=prim

Standby DB init parameter

stndby.__db_cache_size=75497472stndby.__java_pool_size=4194304stndby.__large_pool_size=4194304stndby.__shared_pool_size=79691776 stndby.__streams_pool_size=0*.archive_lag_target=0*.audit_file_dest='/u01/app/oracle/admin/stndby/adump' *.background_dump_dest='/u01/app/oracle/admin/stndby/bdump' *.compatible='10.2.0.1.0'


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*.control_files='/u01/app/oracle/oradata/STNDBY/controlfile/stndby01.ctl','/u01/app/oracle/flash_recovery_area/STNDBY/controlfile/stndby02.ctl'*.core_dump_dest='/u01/app/oracle/admin/stndby/cdump' *.db_block_size=8192*.db_create_file_dest='/u01/app/oracle/oradata' *.db_domain=''*.db_file_multiblock_read_count=16 *.db_name='primary'*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area' *.db_recovery_file_dest_size=2147483648 *.db_unique_name='stndby'*.dg_broker_start=TRUE*.dispatchers='(PROTOCOL=TCP) (SERVICE=stndbyXDB)'*.fal_client='stndby'*.fal_server='primary'*.job_queue_processes=10*.log_archive_config='DG_CONFIG=(stndby,primary)' *.log_archive_dest_1='LOCATION=/u01/app/oracle/oradata/STNDBY/archVALID_FOR=(ALL_LOGFILES,ALL_ROLES)DB_UNIQUE_NAME=stndby'

*.log_archive_dest_2='SERVICE=primary LGWR ASYNCVALID_FOR=(ALL_LOGFILES,PRIMARY_ROLE)DB_UNIQUE_NAME=primary'

*.log_archive_dest_state_1='ENABLE' *.log_archive_dest_state_2='ENABLE' *.log_archive_format='%t_%s_%r.dbf' *.log_archive_max_processes=2*.log_archive_trace=0*.db_file_name_convert= 'PRIMARY', 'STNDBY'*.log_file_name_convert='PRIMARY', 'STNDBY'*.open_cursors=300*.pga_aggregate_target=16777216*.processes=150*.remote_login_passwordfile='EXCLUSIVE' *.sga_target=167772160*.standby_archive_dest='/u01/app/oracle/oradata/STNDBY/arch' *.standby_file_management='AUTO'*.undo_management='AUTO'*.undo_tablespace='UNDOTBS1'*.user_dump_dest='/u01/app/oracle/admin/stndby/udump'*.local_listener=stnd

Enabling Archiving on primary DB:

Ensure that the primary is in archive log mode

SQL>shutdown immediateSQL>startup mount;SQL>alter database archive log;SQL>alter database open;

tnsnames/listener.ora configuration:


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# Tnsnames.ora Network Configuration File:/u01/app/oracle/product/10.2.0/db10g/network/admin/tnsnames.ora # Generated by Oracle configuration tools.

STNDBY =(DESCRIPTION =

(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = node2-prv)(PORT = 10521)))(CONNECT_DATA =(SERVICE_NAME = STNDBY)

))

PRIM =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = node1-prv)(PORT = 10521)))

PRIMARY =

(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = node1-prv)(PORT = 10521))

)(CONNECT_DATA =(SERVICE_NAME = PRIMARY)

))

EXTPROC_CONNECTION_DATA =(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))

)(CONNECT_DATA =(SID = PLSExtProc)(PRESENTATION = RO)

))

Copy the same file to the standby server and adjust it based on thelistener.ora file. Also update the listener.ora file so that it listen theSIDs mentioned in the tnsnames.ora file.

# Listener.ora Network Configuration File:/u01/app/oracle/product/10.2.0/db10g/network/admin/listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER_STBY =(SID_LIST =(SID_DESC =(SID_NAME = PLSExtProc)(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)(PROGRAM = extproc)

)


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(SID_DESC =(SID_NAME = stndby)(GLOBAL_DBNAME = stndby_DGMGRL)(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)

))

LISTENER_STBY =(DESCRIPTION_LIST =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = node2-prv)(PORT = 10521))(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))

))

Standby Redo Logs (SLRs) Creation:

In case of OMF:

Get the max group# of online redo logs on PRIMARY database

SELECT max (group#) from v$logfile;

Create the standby redo logs on the primary database with the same size ofthat of online redo logs. If the above query retuns the value of 3 and eachlog file is 50M in size (from the below query) then, create atleast 4standbyredo logs of the size of 50M per thread.

SELECT byte from v$log;

Create the SRL's :

ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 SIZE 50M/




Backup the primary DB:

Take a cold/Hot/RMAN backup of the primary database. I used the coldbackup in this case.

SQL>SHUTDOWN IMMEDIATE

Backup the datafiles, online redologs and the standby logs if created andscp to the standby server in the corresponding directory. I used the same


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directory structure as that with primary.The only differences was the name of the directory. For e.g.,

On primary database, I have a path of/u01/app/oracle/oradata/PRIMARY/datafile whereas

On standby server, I have a path of/u01/app/oracle/oradata/STNDBY/datafile,

This is the reason, I have used the db_file_name_convert parameter in theprimary init.ora file with the value ofdb_file_name_convert=PRIMARY,STNDBY

and in the standby init.ora file with the value of

db_file_name_convert=STNDBY, PRIMARY

Create the Standby Controlfile:On Primary Database:

SQL>STARTUP MOUNT;SQL>ALTER DATABASE CREATE STANDBY CONTROLFILE AS '/tmp/stndby01.ctl';SQL>ALTER DATABASE OPEN;

scp the stndby01.ctl file to the standby site. I have multiplexed it in theinitstndby.ora file. So I SCPed the same file to both the locations mentionedin the initstndby.ora file.

Also, SCPed the $ORACLE_HOME/dbs/orapwprimaryfile of the primary tothe same location on the standby with the name oforapwstndby.

Starting and Verifying the standby DB:

SQL>create spfile from pfile;SQL>STARTUP MOUNT;SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENTLOGFILE DISCONNECT;

Verify the Standby:

- Identify the existing files on the standby

SQL> SELECT SEQUENCE#, FIRST_TIME, NEXT_TIMEFROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;

Switch a log on the primary database:

SQL>ALTER SYSTEM SWITCH LOGFILE;


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- Re-Run the same SQL to make sure that the logs are received and appliedto

the standby server.

Verify that these logs were applied:

SELECT SEQUENCE#, APPLIED FROM V$ARCHIVED_LOGORDER BY SEQUENCE#;

Testing Realtime Apply:

On Primary Database: create a table 'test' and insert a record.

INSERT INTO test VALUES (sysdate);COMMIT;

Do not make a log switch because I set up the LGWR ASYNC option so that

The redo should be transferred and applied to the standby server in realtime.

On the STANDBY DB server:

SELECT PROCESS, STATUS,SEQUENCE#,BLOCK#,BLOCKS, DELAY_MINS FROMV$MANAGED_STANDBY;

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;ALTER DATABASE OPEN READ ONLY;

SELECT * FROM test;

You should see the commited transaction.

Place the standby back in managed recover mode

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILEDISCONNECT;

This will take the standby directly from read only mode and place it inmanaged recovery mode.

=========================================================================================

Click HERE for Step By Step Process of Configuring RAC StandbyData guard for RAC Primary ON Red hat Linux.
http://www.oracledba.org/10g/dr/10gR2_dataguard_RAC_to_RAC.htmlhttp://www.oracledba.org/10g/dr/10gR2_dataguard_RAC_to_RAC.html


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Data Guard Project Details