Dataguard Broker and Real-Time Apply - 10g

Broker, Dataguard e Real-Time Apply - 10g

Este é o complemento do artigo anterior, onde discutimos como montar um Data Guard usando o RMAN. A seguir, farei da mesma forma, ou seja, não haverá explicações específicas para os comandos, já que o melhor source para isso é o próprio manual. Então começamos com as instâncias criadas no artigo anterior (n1dg e n2dg), a princípio definidas como n1dg = nó primário e n2dg = nó standby físico. Vamos então aos copies e pastes. Garantia que não havia nenhuma instance viva.

[marcio@anakin ~]$ ps -ef | grep pmon_ marcio 6175 6044 0 00:07 pts/1 00:00:00 gre p pmon_ [marcio@anakin ~]$ [marcio@anakin ~]$ [marcio@anakin ~]$ su - oracle Password: [oracle@anakin ~]$ [oracle@anakin ~]$ [oracle@anakin ~]$ cd /oracle/admin/ [oracle@anakin admin]$ ll -tr total 20 drwxr-x--- 6 oracle dba 4096 Feb 15 14:22 +ASM drwxr-x--- 8 oracle dba 4096 Feb 15 14:28 lx10g drwxr-xr-x 7 ora92 dba 4096 Mar 27 16:48 lx92 drwxr-x--- 9 oracle dba 4096 Jun 3 23:06 n1dg drwxr-xr-x 9 oracle dba 4096 Jun 3 23:58 n2dg [oracle@anakin admin]$

Levantando nó primário.

[oracle@anakin admin]$ export ORACLE_SID=n1dg [oracle@anakin admin]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:08:17 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to an idle instance. idle> startup ORACLE instance started. Total System Global Area 608174080 bytes Fixed Size 1263200 bytes Variable Size 205523360 bytes Database Buffers 394264576 bytes Redo Buffers 7122944 bytes Database mounted. Database opened. idle>

Checando os parâmetros pré-configurados no artigo anterior.

idle> show parameter archive NAME TYPE VA LUE ------------------------------------ ----------- -- --------------------------- archive_lag_target integer 0 log_archive_config string DG _CONFIG=(n1, n2) log_archive_dest string log_archive_dest_1 string LO CATION=/backup/n1/arch log_archive_dest_10 string log_archive_dest_2 string log_archive_dest_3 string log_archive_dest_4 string log_archive_dest_5 string log_archive_dest_6 string log_archive_dest_7 string log_archive_dest_8 string log_archive_dest_9 string log_archive_dest_state_1 string en able log_archive_dest_state_10 string en able log_archive_dest_state_2 string en able log_archive_dest_state_3 string en able log_archive_dest_state_4 string en able log_archive_dest_state_5 string en able log_archive_dest_state_6 string en able log_archive_dest_state_7 string en able log_archive_dest_state_8 string en able log_archive_dest_state_9 string en able log_archive_duplex_dest string log_archive_format string %t _%s_%r.dbf log_archive_local_first boolean TR UE log_archive_max_processes integer 2 log_archive_min_succeed_dest integer 1 log_archive_start boolean FA LSE log_archive_trace integer 0 remote_archive_enable string tr ue standby_archive_dest string /b ackup/n1/arch idle> show parameter db_name NAME TYPE VA LUE ------------------------------------ ----------- -- ------------------------- db_name string N1 DG idle> show parameter db_unique_name NAME TYPE VA LUE

of 10Blog do Marcio Portes: Broker, Dataguard e Real-Time Apply - 10g

7/8/2010http://mportes.blogspot.com/2007/06/broker-dataguard-e-real-time-apply-10g.html

------------------------------------ ----------- -- ------------------------- db_unique_name string n1 idle> show parameter fal NAME TYPE VA LUE ------------------------------------ ----------- -- ------------------------- fal_client string N1 fal_server string N2 idle>

No nó primário, setar o DEST_1 com o novo parâmetro VALID_FOR Dataguard na versão 10g juntamente com o db_unique_name.

idle> alter system set LOG_ARCHIVE_DEST_1='LOCATION =/backup/n1/arch 2 VALID_FOR=(ALL_LOGFILES, ALL_ROLES) 3 DB_UNIQUE_NAME=n1' 4 / System altered.

Da mesma forma, porém desta vez vamos configurar o DEST_2, onde será entregue o archive para o standby. Nessa configuração, é importante para aplicação via archives, porém não obrigatório para nosso exemplo, porque faremos real-time apply, ou seja, poderíamos deixar de configurar o DEST_2 e criar somente os standby logfiles. Essa configuração é importante em emergências de rede, etc.

idle> alter system set LOG_ARCHIVE_DEST_2='SERVICE= n2 2 VALID_FOR=(ONLINE_LOGFILES,PR IMARY_ROLE) 3 DB_UNIQUE_NAME=n2'; 4 / System altered. idle> show parameter LOG_ARCHIVE_MAX_PROCESSES NAME TYPE VA LUE ------------------------------------ ----------- -- ------------------ log_archive_max_processes integer 2 idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin admin]$ [oracle@anakin admin]$ [oracle@anakin admin]$ echo $ORACLE_SID n1dg [oracle@anakin admin]$ export ORACLE_SID=n2dg

Passo 2: Configurar o standby (n2dg) - Não esquecer que a parte de rede foi previamente definida no artigo anterior.

[oracle@anakin admin]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:17:21 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to an idle instance. idle> startup mount ORA-01078: failure in processing system parameters LRM-00109: could not open parameter file '/oracle/1 0g/dbs/initn2dg.ora' idle> exit Disconnected

Acho interessante deixar os problemas que tive durante a configuração. Por exemplo, o erro acima aconteceu porque eu esqueci de criar o spfile no artigo anterior. Então vamos levantar a instância com o pfile já usado anteriormente e a partir dele criar o spfile.

[oracle@anakin admin]$ cd n2dg/scripts/ [oracle@anakin scripts]$ ll -tr total 8 -rw-r--r-- 1 oracle dba 482 Jun 3 23:57 n2dg.sh -rw-r--r-- 1 oracle dba 646 Jun 4 00:04 init.ora [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:17:43 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to an idle instance. idle> startup mount pfile=./init.ora ORACLE instance started. Total System Global Area 608174080 bytes Fixed Size 1263200 bytes Variable Size 167774624 bytes Database Buffers 432013312 bytes Redo Buffers 7122944 bytes Database mounted. idle> !pwd /oracle/admin/n2dg/scripts idle> create spfile from pfile='/oracle/admin/n2dg/ scripts/init.ora'; File created. idle> startup mount force ORACLE instance started. Total System Global Area 608174080 bytes Fixed Size 1263200 bytes Variable Size 167774624 bytes Database Buffers 432013312 bytes Redo Buffers 7122944 bytes Database mounted. idle> show parameter db_name



NAME TYPE VA LUE ------------------------------------ ----------- -- ----------------------- db_name string n1 dg idle> show parameter db_unique_name NAME TYPE VA LUE ------------------------------------ ----------- -- ----------------------- db_unique_name string n2

Hora das modificações do standby

idle> show parameter STANDBY_ARCHIVE_DEST NAME TYPE VA LUE ------------------------------------ ----------- -- ----------------------- standby_archive_dest string ?/ dbs/arch idle> alter system set STANDBY_ARCHIVE_DEST='/backu p/n2/arch'; System altered. idle> alter system set log_archive_config='DG_CONFI G=(n1, n2)'; System altered. idle> alter system set LOG_ARCHIVE_DEST_1='LOCATION =/backup/n2/arch 2 VALID_FOR=(ALL_LOGFILES,AL L_ROLES) 3 DB_UNIQUE_NAME=n2' 4 / System altered. idle> alter system set LOG_ARCHIVE_DEST_2='SERVICE= n1 2 VALID_FOR=(ONLINE_LOGFILES ,PRIMARY_ROLE) 3 DB_UNIQUE_NAME=n1' 4 / System altered.

Server do standby é o nó principal (N1) e client é o (N2) o inverso do nó primário.

idle> alter system set fal_server=n1; System altered. idle> alter system set fal_client=n2; System altered. idle> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIM ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- --------- 1 1 2 5242 8800 1 NO CURRENT 4856 05 03-JUN-07 3 1 1 5242 8800 1 YES INACTIVE 4569 54 03-JUN-07 2 1 0 5242 8800 1 YES UNUSED 0 3 rows selected.

Os próximos passos são a chave para o Real-Time Apply, porque faremos a aplicação das modificações através dos standby lofiles. Há necessidade criar tanto no physical standby como no primário.

idle> ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 (' /backup/n2/n2dg/srl01.log') SIZE 50M; Database altered. idle> ALTER DATABASE ADD STANDBY LOGFILE GROUP 5 (' /backup/n2/n2dg/srl02.log') SIZE 50M; Database altered. idle> ALTER DATABASE ADD STANDBY LOGFILE GROUP 6 (' /backup/n2/n2dg/srl03.log') SIZE 50M; Database altered. idle> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT; Database altered. idle> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIM ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- --------- 1 1 0 5242 8800 1 NO CURRENT 4856 05 03-JUN-07 3 1 0 5242 8800 1 YES UNUSED 4569 54 03-JUN-07 2 1 0 5242 8800 1 YES UNUSED 0 3 rows selected. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin scripts]$ export ORACLE_SID=n1dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:28:15 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options sys:N1DG> ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 ('/backup/n1/n1dg/srl01.log') SIZE 50M; Database altered. sys:N1DG> ALTER DATABASE ADD STANDBY LOGFILE GROUP 5 ('/backup/n1/n1dg/srl02.log') SIZE 50M; Database altered. sys:N1DG> ALTER DATABASE ADD STANDBY LOGFILE GROUP 6 ('/backup/n1/n1dg/srl03.log') SIZE 50M; Database altered. sys:N1DG> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIME ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- ------------------- 1 1 5 5242 8800 1 YES INACTIVE 5288 46 05/06/2007 00:00:55 3 1 7 5242 8800 1 NO CURRENT 6024 14 12/06/2007 00:08:28 2 1 6 5242 8800 1 YES INACTIVE 5743 49 09/06/2007 19:53:50 3 rows selected. sys:N1DG> alter system switch logfile; System altered. sys:N1DG> alter system switch logfile; System altered.



sys:N1DG> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIME ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- ------------------- 1 1 8 5242 8800 1 NO ACTIVE 6046 60 12/06/2007 00:29:30 3 1 7 5242 8800 1 NO ACTIVE 6024 14 12/06/2007 00:08:28 2 1 9 5242 8800 1 NO CURRENT 6046 62 12/06/2007 00:29:32 3 rows selected. sys:N1DG> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin scripts]$ export ORACLE_SID=n2dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:29:55 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options idle> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIME ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- ------------------- 1 1 0 5242 8800 1 NO CURRENT 4856 05 03/06/2007 23:23:05 3 1 0 5242 8800 1 YES UNUSED 4569 54 03/06/2007 23:10:55 2 1 0 5242 8800 1 YES UNUSED 0 3 rows selected. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options

Como notado acima, nada de aplicação de redos ainda. Agora entra a parte da configuração do Data Guard Broker através do parâmetro DG_BROKER_START, não esquecer de mudar para TRUE em todos os nós que serão controlados pelo BROKER. (Obs: Depois que voce conhece o broker, nunca mais vai achar difícil fazer switchover, failover ou qualquer outra manutenção no seu dataguard).

[oracle@anakin scripts]$ export ORACLE_SID=n1dg [oracle@anakin scripts]$ [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:30:24 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options sys:N1DG> show parameter dg NAME TYPE VA LUE ------------------------------------ ----------- -- ------------------------------------------------ dg_broker_config_file1 string /o racle/10g/dbs/dr1n1.dat dg_broker_config_file2 string /o racle/10g/dbs/dr2n1.dat dg_broker_start boolean FA LSE sys:N1DG> alter system set dg_broker_start=true; System altered. sys:N1DG> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin scripts]$ export ORACLE_SID=n2dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:30:48 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options idle> alter system set dg_broker_start=true; System altered. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin scripts]$ export ORACLE_SID=n1dg [oracle@anakin scripts]$

Ok, agora que os serviços do Broker estão no ar, vamos ao client para criar a configuração do dataguard, note que o seu standby já está montado, portanto o broker irá herdar a maioria de suas configurações quando o database for adicionado. Neste ponto não esqueça de ter criado os arquivos de senha e colocado a mesma senha do sys para todos os nós, isso facilita na manutenção, porque o broker se conecta nos nós e faz shutdown e startup quando necessário.

[oracle@anakin scripts]$ dgmgrl DGMGRL for Linux: Version 10.2.0.3.0 - Production Copyright (c) 2000, 2005, Oracle. All rights reserv ed. Welcome to DGMGRL, type "help" for information. DGMGRL> connect sys/oracle Connected. DGMGRL> DGMGRL> create configuration mportes_dg as > primary database is n1 > connect identifier is n1; Configuration "mportes_dg" created with primary dat abase "n1" DGMGRL> ADD DATABASE n2 AS CONNECT IDENTIFIER IS n2 MAINTAINED AS PHYSICAL; Error: ORA-16796: one or more properties could not be imported from the database Failed. DGMGRL> exit

Importante o erro acima, nesse ponto vejo qual foi o problema consultando o código de erro online.



[oracle@anakin scripts]$ oerr ora 16796 16796, 0000, "one or more properties could not be i mported from the database" // *Cause: The broker was unable to import propert y values for the database // being added to the broker configuration . This error indicates: // - the net-service-name specified in DGM GRL's CREATE CONFIGURATION // or ADD DATABASE command is not one th at provides access to the // database being added, or // - there are no instances running for th e database being added. // *Action: Remove the database from the configurat ion using the REMOVE // CONFIGURATION or REMOVE DATABASE comman d. Make sure that the // database to be added has at least one i nstance running and that the // net-service-name provides access to the running instance. Then // reissue the CREATE CONFIGURATION or ADD DATABASE command.

Primeira coisa que vem a cabeça é testar a conectividade entre os servidores.

[oracle@anakin scripts]$ tnsping n2 TNS Ping Utility for Linux: Version 10.2.0.3.0 - Pr oduction on 12-JUN-2007 00:32:20 Copyright (c) 1997, 2006, Oracle. All rights reser ved. Used parameter files: Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PR OTOCOL = TCP)(HOST = anakin.mportes.local)(PORT = 1 521)) (CONNECT_DATA = (SERVER = DEDICATED) (SID = n 2dg)))TNS-12541: TNS:no listener

Bingo! Esqueci de subir o listener.

[oracle@anakin scripts]$ lsnrctl start LSNRCTL for Linux: Version 10.2.0.3.0 - Production on 12-JUN-2007 00:32:25 Copyright (c) 1991, 2006, Oracle. All rights reser ved. Starting /oracle/10g/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 10.2.0.3.0 - Production System parameter file is /oracle/10g/network/admin/ listener.ora Log messages written to /oracle/10g/network/log/lis tener.log Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)( HOST=anakin.mportes.local)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)( HOST=anakin.mportes.local)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Versio n 10.2.0.3.0 - Production Start Date 12-JUN-2007 00:32:25 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authenticati on SNMP OFF Listener Parameter File /oracle/10g/network/admin /listener.ora Listener Log File /oracle/10g/network/log/l istener.log Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=anakin. mportes.local)(PORT=1521))) Services Summary... Service "PLSExtProc" has 1 instance(s). Instance "PLSExtProc", status UNKNOWN, has 1 hand ler(s) for this service... Service "lx10g" has 1 instance(s). Instance "lx10g", status UNKNOWN, has 1 handler(s ) for this service... Service "n1_DGMGRL" has 1 instance(s). Instance "n1dg", status UNKNOWN, has 1 handler(s) for this service... Service "n2_DGMGRL" has 1 instance(s). Instance "n2dg", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully

Vamos tentar de novo!

[oracle@anakin scripts]$ dgmgrl DGMGRL for Linux: Version 10.2.0.3.0 - Production Copyright (c) 2000, 2005, Oracle. All rights reserv ed. Welcome to DGMGRL, type "help" for information. DGMGRL> connect sys/oracle Connected. DGMGRL> ADD DATABASE n2 AS CONNECT IDENTIFIER IS n2 MAINTAINED AS PHYSICAL; Database "n2" added

Agora sim, então temos nossa configuração de dataguard criada, porém em estado disable. O comando show configuration mostra o status da sua configuração.

DGMGRL> show configuration Configuration Name: mportes_dg Enabled: NO Protection Mode: MaxPerformance Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg": DISABLED



Habilite a configuração.

DGMGRL> enable configuration Enabled. DGMGRL> show configuration verbose Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxPerformance Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg": Warning: ORA-16610: command 'ENABLE DATABASE n2' in progress

E tenha certa paciência! :-) Aqui é interessante uma dica: abra duas sessões extras e vá ao diretório do alert e faça um "tail -f alert_..." e veja o broker em ação. Ele fará várias modificações e no momento que voce habilita, ele começa a aplicar os archives e sincronizar os redologs, ainda falta configurar o modo de aplicação, eu quero que seja MAXAVAILABILITY.

DGMGRL> show configuration verbose Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxPerformance Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg": SUCCESS

Perfeito. Neste ponto faremos a configuração para que o protection mode seja maxavailability, ou seja, sem perda de dados com máximo de performance (possível).

DGMGRL> alter configuration set protection mode as maxavailability; Error: ORA-16627: operation disallowed since no sta ndby databases would remain to support protection m ode Failed.

Ok, ok... Faltou alterar o LogXptMode de ASYNC para SYNC. Os helps abaixo ajudam muito na medida em que não é frequente o uso do client do broker e ninguem aqui está participando do campionato mundial de "saber tudo de cabeça".

DGMGRL> help show Display information about a configuration, database , or instance Syntax: SHOW CONFIGURATION; SHOW DATABASE [VERBOSE] []; SHOW INSTANCE [VERBOSE] [] [ON DATABASE ]; DGMGRL> show database verbose n1 Database Name: n1 Role: PRIMARY Enabled: YES Intended State: ONLINE Instance(s): n1dg Properties: InitialConnectIdentifier = 'n1' LogXptMode = 'ASYNC' Dependency = '' DelayMins = '0' Binding = 'OPTIONAL' MaxFailure = '0' MaxConnections = '1' ReopenSecs = '300' NetTimeout = '180' LogShipping = 'ON' PreferredApplyInstance = '' ApplyInstanceTimeout = '0' ApplyParallel = 'AUTO' StandbyFileManagement = 'AUTO' ArchiveLagTarget = '0' LogArchiveMaxProcesses = '2' LogArchiveMinSucceedDest = '1' DbFileNameConvert = '' LogFileNameConvert = '' FastStartFailoverTarget = '' StatusReport = '(monitor)' InconsistentProperties = '(monitor)' InconsistentLogXptProps = '(monitor)' SendQEntries = '(monitor)' LogXptStatus = '(monitor)' RecvQEntries = '(monitor)' HostName = 'anakin.mportes .local' SidName = 'n1dg'



LocalListenerAddress = '(ADDRESS=(PROT OCOL=tcp)(HOST=anakin.mportes.local)(PORT=1521))' StandbyArchiveLocation = '/backup/n1/arc h' AlternateLocation = '' LogArchiveTrace = '0' LogArchiveFormat = '%t_%s_%r.dbf' LatestLog = '(monitor)' TopWaitEvents = '(monitor)' Current status for "n1": SUCCESS DGMGRL> help alter Edit a configuration, database, or instance Syntax: EDIT CONFIGURATION SET PROTECTION MODE AS {MaxProtection|MaxAvailability|MaxPerformance}; EDIT CONFIGURATION SET PROPERTY = ; EDIT DATABASE SET PROPERTY = ; EDIT DATABASE RENAME TO ; EDIT DATABASE SET STATE = [WITH APPLY INSTANCE = ]; EDIT INSTANCE [ON DATABASE ] SET AUTO PFILE [ = {|OFF} ]; EDIT INSTANCE [ON DATABASE ] SET PROPERTY = ;

Alterar nos dois databases.

DGMGRL> edit database n1 set property LogXptMode='S YNC'; Property "logxptmode" updated DGMGRL> edit database n2 set property LogXptMode='S YNC'; Property "logxptmode" updated DGMGRL> alter configuration set protection mode as maxavailability; Succeeded.

Ok, protection mode alterado! O maxavailability é nosso preferido.

DGMGRL> show configuration verbose Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxAvailability Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg": SUCCESS DGMGRL> exit

Uma vez habilitada a configuração, os bancos já deverão estar sincronizados. Vamos a alguns testes.

[oracle@anakin scripts]$ export ORACLE_SID=n2dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:38:37 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options idle> select * from v$log; GROUP# THREAD# SEQUENCE# B YTES MEMBERS ARC STATUS FIRST_CHANG E# FIRST_TIME ------------- ------------- ------------- --------- ---- ------------- --- ---------------- ----------- -- ------------------- 1 1 14 5242 8800 1 YES CLEARING_CURRENT 6048 71 12/06/2007 00:38:10 3 1 14 5242 8800 1 YES CLEARING 6048 71 12/06/2007 00:38:10 2 1 13 5242 8800 1 YES CLEARING 6048 38 12/06/2007 00:37:00 3 rows selected. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options

Hora das manutenções... :-) Olha como é difícil fazer SWITCHOVER.

[oracle@anakin scripts]$ dgmgrl DGMGRL for Linux: Version 10.2.0.3.0 - Production Copyright (c) 2000, 2005, Oracle. All rights reserv ed. Welcome to DGMGRL, type "help" for information. DGMGRL> connect sys/oracle Connected. DGMGRL> show configuration Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxAvailability Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg":



SUCCESS DGMGRL> switchover to n2 Performing switchover NOW, please wait... Operation requires shutdown of instance "n1dg" on d atabase "n1" Shutting down instance "n1dg"... ORA-01109: database not open Database dismounted. ORACLE instance shut down. Operation requires shutdown of instance "n2dg" on d atabase "n2" Shutting down instance "n2dg"... ORA-01109: database not open Database dismounted. ORACLE instance shut down. Operation requires startup of instance "n1dg" on da tabase "n1" Starting instance "n1dg"... ORACLE instance started. Database mounted. Operation requires startup of instance "n2dg" on da tabase "n2" Starting instance "n2dg"... ORACLE instance started. Database mounted. Switchover succeeded, new primary is "n2" DGMGRL> show configuration Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxAvailability Fast-Start Failover: DISABLED Databases: n1 - Physical standby database n2 - Primary database Current status for "mportes_dg": SUCCESS DGMGRL> exit

Pronto! Viu só? Bastou "switchover to " e ele faz tudo. Não deixe de ver os alerts logs com o tail -f. Vamos verificar!

[oracle@anakin scripts]$ echo $ORACLE_SID n2dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:44:02 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options sys:N1DG> select NAME, OPEN_MODE, PROTECTION_MODE, PROTECTION_LEVEL, REMOTE_ARCHIVE, DATABASE_ROLE, 2 SWITCHOVER_STATUS, DATAGUARD_BROKER, FO RCE_LOGGING 3 from v$database 4 / NAME OPEN_MODE PROTECTION_MODE PROTECTIO N_LEVEL REMOTE_A DATABASE_ROLE SWITCHOVER_ST ATUS DATAGUAR FOR --------- ---------- -------------------- --------- ----------- -------- ---------------- ------------- ------- -------- --- N1DG READ WRITE MAXIMUM AVAILABILITY MAXIMUM A VAILABILITY ENABLED PRIMARY SESSIONS ACTI VE ENABLED YES 1 row selected. sys:N1DG> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options [oracle@anakin scripts]$ export ORACLE_SID=n1dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:45:25 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options idle> select sequence#, dest_id, creator, registrar , archived, applied, status from v$archived_log ord er by 1; SEQUENCE# DEST_ID CREATOR REGISTR ARC APP S ------------- ------------- ------- ------- --- --- - 2 2 ARCH ARCH YES NO A 3 2 ARCH ARCH YES NO A 4 2 ARCH ARCH YES NO A 5 1 ARCH ARCH YES YES A 5 2 ARCH ARCH YES NO A 6 1 ARCH ARCH YES YES A 6 2 ARCH ARCH YES NO A 7 1 ARCH ARCH YES YES A 7 2 ARCH ARCH YES NO A 8 1 ARCH ARCH YES YES A 8 2 ARCH ARCH YES NO A 9 2 ARCH ARCH YES NO A 9 1 FGRD FGRD YES YES A 10 1 ARCH ARCH YES YES A 10 2 ARCH ARCH YES NO A 11 1 ARCH ARCH YES YES A 11 2 ARCH ARCH YES YES A 12 1 ARCH ARCH YES YES A 12 2 ARCH ARCH YES YES A 13 2 LGWR LGWR YES YES A 13 1 FGRD FGRD YES YES A 14 2 LGWR LGWR YES NO A 14 1 FGRD FGRD YES YES A 15 2 LGWR LGWR YES NO A 15 1 FGRD FGRD YES YES A 16 1 FGRD RFS YES YES A 16 2 FGRD FGRD YES NO A



17 1 ARCH RFS YES YES A 18 1 ARCH RFS YES YES A 29 rows selected. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options

Voltando para o nó N1.

[oracle@anakin scripts]$ dgmgrl DGMGRL for Linux: Version 10.2.0.3.0 - Production Copyright (c) 2000, 2005, Oracle. All rights reserv ed. Welcome to DGMGRL, type "help" for information. DGMGRL> connect sys/oracle Connected. DGMGRL> show configuration Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxAvailability Fast-Start Failover: DISABLED Databases: n1 - Physical standby database n2 - Primary database Current status for "mportes_dg": SUCCESS DGMGRL> switchover to n1 Performing switchover NOW, please wait... Operation requires shutdown of instance "n2dg" on d atabase "n2" Shutting down instance "n2dg"... ORA-01109: database not open Database dismounted. ORACLE instance shut down. Operation requires shutdown of instance "n1dg" on d atabase "n1" Shutting down instance "n1dg"... ORA-01109: database not open Database dismounted. ORACLE instance shut down. Operation requires startup of instance "n2dg" on da tabase "n2" Starting instance "n2dg"... ORACLE instance started. Database mounted. Operation requires startup of instance "n1dg" on da tabase "n1" Starting instance "n1dg"... ORACLE instance started. Database mounted. Switchover succeeded, new primary is "n1" DGMGRL> DGMGRL> show configuration Configuration Name: mportes_dg Enabled: YES Protection Mode: MaxAvailability Fast-Start Failover: DISABLED Databases: n1 - Primary database n2 - Physical standby database Current status for "mportes_dg": SUCCESS DGMGRL> exit [oracle@anakin scripts]$ echo $ORACLE_SID n1dg [oracle@anakin scripts]$ export ORACLE_SID=n2dg [oracle@anakin scripts]$ sqlplus / as sysdba SQL*Plus: Release 10.2.0.3.0 - Production on Tue Ju n 12 00:54:16 2007 Copyright (c) 1982, 2006, Oracle. All Rights Reser ved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2 .0.3.0 - Production With the Partitioning, OLAP and Data Mining options idle> SELECT PROCESS, STATUS,SEQUENCE#,BLOCK#,BLOC KS, DELAY_MINS FROM 2 V$MANAGED_STANDBY; PROCESS STATUS SEQUENCE# BLOCK# BLOCKS DELAY_MINS --------- ------------ ------------- ------------- ------------- ------------- ARCH CLOSING 23 1 67 0 ARCH CLOSING 22 1 1 0 MRP0 APPLYING_LOG 24 14 102400 0 RFS IDLE 24 15 1 0 RFS IDLE 0 0 0 0 RFS IDLE 0 0 0 0 6 rows selected. idle> / PROCESS STATUS SEQUENCE# BLOCK# BLOCKS DELAY_MINS --------- ------------ ------------- ------------- ------------- ------------- ARCH CLOSING 23 1 67 0 ARCH CLOSING 22 1 1 0 MRP0 APPLYING_LOG 24 17 102400 0 RFS IDLE 24 18 1 0 RFS IDLE 0 0 0 0 RFS IDLE 0 0 0 0 6 rows selected. idle> exit Disconnected from Oracle Database 10g Enterprise Ed ition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and



Uma última consideração, quando configuramos o broker para gerenciar o Dataguard, até a versão 9i, não há necessidade de abrir o banco, é possível somente levantar os nós em NOMOUNT que ele faz o resto. Já na versão 10g, é necessário MONTAR o banco para que o broker levante e sincronize os nós. Um lembrete: Use as instruções acima para exercício em ambiente TESTE e por sua conta e risco!

Labels: how to, New Feature

# posted by Marcio : 7:48 PM



Dataguard Broker and Real-Time Apply - 10g

Documents

Transcript of Dataguard Broker and Real-Time Apply - 10g