版权声明:本文为Buddy Yuan原创文章,转载请注明出处。原文地址:Oracle Database 19c使用Data Guard Broker进行Data Guard物理备库设置
今天准备研究学习一下19c的data guard。由于想快速搭建,所以选择了vagrant去拖镜像,但是发现拖下来的东西还是没有实现dg(这里的情况不是很了解,感觉是执行脚本有个地方报错了),不过它里面的脚本我觉得没什么大问题。我自己凑合手动执行脚本搭了一个。
首先看一下先决条件。
primary主机,操作系统是RedHat 7.8,安装了oracle 19c数据库软件,创建了一个叫DB193H1的数据库。
standby主机,操作系统是RedHat 7.8,安装了oracle 19c数据库软件。
1.我们先来看一下vargant中主库需要执行的脚本primary_DB_setup.sh。创建完主库之后,需要修改一些相关参数。同时打开归档,添加STANDBY LOGFILE,并且打开FLASHBACK。由于两边数据文件保持路径一致。因此设置STANDBY_FILE_MANAGEMENT为AUTO即可。这里还把dg_broker_start打开了。
${DB_HOME}/bin/sqlplus / as sysdba ALTER SYSTEM SET db_create_file_dest='/u02/oradata'; ALTER SYSTEM SET db_create_online_log_dest_1='/u02/oradata'; ALTER SYSTEM SET local_listener='LISTENER'; ALTER SYSTEM SET db_recovery_file_dest_size=20G; ALTER SYSTEM SET db_recovery_file_dest='/u01/app/oracle'; exit; ${DB_HOME}/bin/sqlplus / as sysdba SHUTDOWN IMMEDIATE; STARTUP MOUNT; ALTER DATABASE ARCHIVELOG; ALTER DATABASE OPEN; ALTER DATABASE FORCE LOGGING; ALTER SYSTEM SWITCH LOGFILE; ALTER DATABASE ADD STANDBY LOGFILE SIZE 50M; ALTER DATABASE ADD STANDBY LOGFILE SIZE 50M; ALTER DATABASE ADD STANDBY LOGFILE SIZE 50M; ALTER DATABASE ADD STANDBY LOGFILE SIZE 50M; ALTER DATABASE FLASHBACK ON; ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=AUTO; exit; ${DB_HOME}/bin/sqlplus / as sysdba ALTER SYSTEM SET dg_broker_start=TRUE; exit;
2.主库设置完毕之后,就可以配置tns链接串了,这个配置需要在主库和备库均设置。设置如下。
DB193H1 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = primary)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = DB193H1) ) ) DB193H1_STDBY = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = standby)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SID = DB193H1) ) )
当然还需要我们配置一下静态注册。在监听的listener.ora文件中增加下列配置,这个配置需要在主库和备库均设置
SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = DB193H1_DGMGRL) (DB_HOME = /u01/app/oracle/product/19.3.0.0/dbhome_1) (SID_NAME = DB193H1) ) )
3.接下来是备库的设置。我们可以按照standby_DB_setup.sh的脚本来设置。先创建相关文件夹(这里需要注意的是,如果你使用了CDB和PDB,就需要创建上面那pdbseed和pdb相关文件夹,没有则不需要),然后生成密码文件。这里的DB_NAME取名为DB193H1_STDBY
if [ "${CDB}" == "true" ] then mkdir -p /u02/oradata/${DB_NAME}/pdbseed mkdir -p /u02/oradata/${DB_NAME}/pdb1 fi mkdir -p ${DB_BASE}/fast_recovery_area/${DB_NAME} mkdir -p ${DB_BASE}/admin/${DB_NAME}/adump orapwd file=$ORACLE_HOME/dbs/orapw${DB_NAME} password=${SYS_PASSWORD} entries=10 format=12
4.上述配置完成后,创建参数文件,启动备库到nomount状态。
cat > /tmp/init_standby.ora *.db_name='${DB_NAME}' *.local_listener='LISTENER' echo "-----------------------------------------------------------------" echo -e "${INFO}`date +%F' '%T`: Making auxillary instance" echo "-----------------------------------------------------------------" export ORACLE_SID=${DB_NAME} ${DB_HOME}/bin/sqlplus / as sysdba --SHUTDOWN IMMEDIATE; STARTUP NOMOUNT PFILE='/tmp/init_standby.ora'; exit;
5.在主库上执行rman连接到备库实例,执行DUPLICATE操作,这里很简单我们的参数只需要修改一个db_unique_name即可,如果文件路径不一致,就需要在这里设置db_file_name_convert和log_file_name_convert
${DB_HOME}/bin/rman TARGET sys/${SYS_PASSWORD}@${DB_NAME} AUXILIARY sys/${SYS_PASSWORD}@${DB_NAME}_STDBY DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE DORECOVER SPFILE SET db_unique_name='${DB_NAME}_STDBY' COMMENT 'Standby' NOFILENAMECHECK; exit;
6.上述操作完成之后就可以进入到Data Guard Broker的配置了。先进入到备库设置参数。
ALTER SYSTEM SET dg_broker_start = true;
7.接下来在主库配置Data Guard Broker
${DB_HOME}/bin/dgmgrl sys/${SYS_PASSWORD}@${DB_NAME} CREATE CONFIGURATION db_broker_config AS PRIMARY DATABASE IS ${DB_NAME} CONNECT IDENTIFIER IS ${DB_NAME}; ADD DATABASE ${DB_NAME}_STDBY AS CONNECT IDENTIFIER IS ${DB_NAME}_STDBY MAINTAINED AS PHYSICAL; ENABLE CONFIGURATION;
我按照这些步骤操作完成之后,执行发现报ORA-16810错误。
[oracle@primary ~]$ dgmgrl sys/welcome1@DB193H1
DGMGRL for Linux: Release 19.0.0.0.0 - Production on Mon Jun 8 12:49:56 2020
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
Welcome to DGMGRL, type "help" for information.
Connected to "DB193H1"
Connected as SYSDBA.
DGMGRL>
DGMGRL> CREATE CONFIGURATION db_broker_config AS PRIMARY DATABASE IS DB193H1 CONNECT IDENTIFIER IS DB193H1;
Configuration "db_broker_config" created with primary database "db193h1"
DGMGRL>
DGMGRL> ADD DATABASE DB193H1_STDBY AS CONNECT IDENTIFIER IS DB193H1_STDBY MAINTAINED AS PHYSICAL;
Database "db193h1_stdby" added
DGMGRL> ENABLE CONFIGURATION;
Enabled.
DGMGRL> DGMGRL>
DGMGRL>
DGMGRL>
DGMGRL> SHOW CONFIGURATION;
Configuration - db_broker_config
Protection Mode: MaxPerformance
Members:
db193h1 - Primary database
db193h1_stdby - Physical standby database
Error: ORA-16810: multiple errors or warnings detected for the member
经过详细查看备库的状态,发现是ORA-16766: Redo Apply is stopped,原来是一直没有启动备库的redo apply。
DGMGRL> show database verbose db193h1_stdby
Database - db193h1_stdby
Role: PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag: 0 seconds (computed 0 seconds ago)
Apply Lag: (unknown)
Average Apply Rate: (unknown)
Active Apply Rate: (unknown)
Maximum Apply Rate: (unknown)
Real Time Query: OFF
Instance(s):
DB193H1
Database Error(s):
ORA-16766: Redo Apply is stopped
Database Warning(s):
ORA-16854: apply lag could not be determined
Properties:
DGConnectIdentifier = 'db19h1_stdby'
ObserverConnectIdentifier = ''
FastStartFailoverTarget = ''
PreferredObserverHosts = ''
LogShipping = 'ON'
RedoRoutes = ''
LogXptMode = 'ASYNC'
DelayMins = '0'
Binding = 'optional'
MaxFailure = '0'
ReopenSecs = '300'
NetTimeout = '30'
RedoCompression = 'DISABLE'
PreferredApplyInstance = ''
ApplyInstanceTimeout = '0'
ApplyLagThreshold = '30'
TransportLagThreshold = '30'
TransportDisconnectedThreshold = '30'
ApplyParallel = 'AUTO'
ApplyInstances = '0'
StandbyFileManagement = ''
ArchiveLagTarget = '0'
LogArchiveMaxProcesses = '0'
LogArchiveMinSucceedDest = '0'
DataGuardSyncLatency = '0'
LogArchiveTrace = '0'
LogArchiveFormat = ''
DbFileNameConvert = ''
LogFileNameConvert = ''
ArchiveLocation = ''
AlternateLocation = ''
StandbyArchiveLocation = ''
StandbyAlternateLocation = ''
InconsistentProperties = '(monitor)'
InconsistentLogXptProps = '(monitor)'
LogXptStatus = '(monitor)'
SendQEntries = '(monitor)'
RecvQEntries = '(monitor)'
HostName = 'standby'
StaticConnectIdentifier = '(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=primary)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=DB193H1_STDBY_DGMGRL)(INSTANCE_NAME=DB193H1)(SERVER=DEDICATED)))'
TopWaitEvents = '(monitor)'
SidName = '(monitor)'
Log file locations:
Alert log : /u01/app/oracle/diag/rdbms/db193h1_stdby/DB193H1/trace/alert_DB193H1.log
Data Guard Broker log : /u01/app/oracle/diag/rdbms/db193h1_stdby/DB193H1/trace/drcDB193H1.log
Database Status:
ERROR
切换到备库,执行应用,再次查看dg broker配置就正常了
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION; DGMGRL> SHOW CONFIGURATION; Configuration - db_broker_config Protection Mode: MaxPerformance Members: db193h1 - Primary database db193h1_stdby - Physical standby database Fast-Start Failover: Disabled Configuration Status: SUCCESS (status updated 46 seconds ago) DGMGRL> SHOW DATABASE db193h1 Database - db193h1 Role: PRIMARY Intended State: TRANSPORT-ON Instance(s): DB193H1 Database Status: SUCCESS DGMGRL> SHOW DATABASE db193h1_stdby Database - db193h1_stdby Role: PHYSICAL STANDBY Intended State: APPLY-ON Transport Lag: 0 seconds (computed 1 second ago) Apply Lag: 0 seconds (computed 1 second ago) Average Apply Rate: 3.00 KByte/s Real Time Query: ON Instance(s): DB193H1 Database Status: SUCCESS
安装顺利成功,接下来我们就可以来研究19c dataguard的新特性了。感兴趣的小伙伴可以自行研究下vargant中的脚本。
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