上一篇文章介绍了Oracle一主两备的DG环境，如何进行switchover切换，也许你会问Oracle一主两备dataguard环境要怎么搭建，本篇文章将为你讲述一主两备dataguard详细搭建步骤。
环境说明
| 主机名 | IP地址 | db_unique_name | 数据库角色 |
|---|---|---|---|
| ora11g | 10.10.10.160 | ora11g | 主库 |
| ora11gdg | 10.10.10.41 | dgora11g | 备库1 |
| ora11gdg2 | 10.10.10.47 | sbora11g | 备库2 |
说明：10.10.10.160为主库，10.10.10.41和10.10.10.47都是它的备库。
主库配置
主库打开归档
–确认数据库开启归档，如未开启归档，请开启归档。
sys@ora11g> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /u01/oradata/archivelog
Oldest online log sequence 307
Next log sequence to archive 313
Current log sequence 313
--如未开启归档，请打开
startup mount;
alter system set log_archive_dest_1='location=/u01/oradata/archivelog' scope=both;
alter database archivelog;
alter database open;
主库打开数据强制日志
--开启强制日志
alter database force logging;
--查询实例的归档模式和附加日志
sys@ora11g> select log_mode,force_logging from v$database;
LOG_MODE FOR
------------ ---
ARCHIVELOG YES
添加standby log
standby redolog的组数参考公式：(online redolog组数 + 1) * 数据库线程数；单机线程数为1，RAC一般为2。
--主库查出大小
select group#,thread#,bytes/1024/1024 M from v$log;
--添加standby log
alter database add standby logfile thread 1 group 4 '/u01/oradata/ora11g/stdredo01.log' size 50M;
alter database add standby logfile thread 1 group 5 '/u01/oradata/ora11g/stdredo02.log' size 50M;
alter database add standby logfile thread 1 group 6 '/u01/oradata/ora11g/stdredo03.log' size 50M;
alter database add standby logfile thread 1 group 7 '/u01/oradata/ora11g/stdredo04.log' size 50M;
sys@ora11g> select group#,thread#,sequence#,archived,status from v$standby_log;
GROUP# THREAD# SEQUENCE# ARC STATUS
---------- ---------- ---------- --- ----------
4 1 0 YES UNASSIGNED
5 1 0 YES UNASSIGNED
6 1 0 YES UNASSIGNED
7 1 0 YES UNASSIGNED
主库配置tnsnames.ora
主库：
vi tnsnames.ora
ORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.160)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ora11g)
)
)
DGORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.41)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = dgora11g)
)
)
SBORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.47)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = sbora11g)
)
)
主库配置DG相关参数
alter system set log_archive_config='DG_CONFIG=(ora11g,dgora11g,sbora11g)' scope=both sid='*';
alter system set log_archive_dest_1='location=/u01/oradata/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=ora11g' scope=both sid='*';
alter system set log_archive_dest_2='SERVICE=dgora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=dgora11g' scope=both sid='*';
alter system set log_archive_dest_3='SERVICE=sbora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=sbora11g' scope=both sid='*';
alter system set fal_server='dgora11g','sbora11g' scope=both sid='*';
alter system set fal_client='ora11g' scope=both sid='*';
alter system set standby_file_management=auto scope=both sid='*';
--alter system set log_archive_dest_state_2=defer scope=both sid='*';
alter system set log_archive_dest_state_2=enable scope=both sid='*';
--alter system set log_archive_dest_state_3=defer scope=both sid='*';
alter system set log_archive_dest_state_3=enable scope=both sid='*';
alter system set db_file_name_convert='/u01/oradata/dgora11g','/u01/oradata/ora11g','/u01/oradata/sbora11g','/u01/oradata/ora11g' scope=spfile sid='*';
alter system set log_file_name_convert='/u01/oradata/dgora11g','/u01/oradata/ora11g','/u01/oradata/sbora11g','/u01/oradata/ora11g' scope=spfile sid='*';
#db_file_name_convert、log_file_name_convert需要重启数据库才能生效，若生产不能马上重启，需要找停机窗口重启，不影响后续的dg同步。
#####查看修改是否生效
set linesize 500 pages 1000
col value for a100
col name for a50
select name, value
from v$parameter
where name in ('db_name','db_unique_name',
'log_archive_config',
'log_archive_dest_1',
'log_archive_dest_2',
'log_archive_dest_3',
'log_archive_dest_state_1',
'log_archive_dest_state_2',
'log_archive_dest_state_3',
'remote_login_passwordfile',
'log_archive_format',
'log_archive_max_processes',
'fal_server',
'fal_client',
'db_file_name_convert',
'log_file_name_convert',
'standby_file_management')
/
NAME VALUE
-------------------------------------------------- ----------------------------------------------------------------------------------------------------
db_file_name_convert /u01/oradata/dgora11g, /u01/oradata/ora11g, /u01/oradata/sbora11g, /u01/oradata/ora11g
log_file_name_convert /u01/oradata/dgora11g, /u01/oradata/ora11g, /u01/oradata/sbora11g, /u01/oradata/ora11g
log_archive_dest_1 location=/u01/oradata/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=ora11g
log_archive_dest_2 SERVICE=dgora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=dgora11g
log_archive_dest_3 SERVICE=sbora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=sbora11g
log_archive_dest_state_1 ENABLE
log_archive_dest_state_2 ENABLE
log_archive_dest_state_3 ENABLE
fal_client ora11g
fal_server dgora11g, sbora11g
log_archive_config DG_CONFIG=(ora11g,dgora11g,sbora11g)
log_archive_format %t_%s_%r.dbf
log_archive_max_processes 4
standby_file_management AUTO
remote_login_passwordfile EXCLUSIVE
db_name ora11g
db_unique_name ora11g
17 rows selected.
拷贝主库的pfile文件和密码文件到备库
创建主库pfil文件，并将pfile文件和密码文件复制到备1和备2
create pfile='/home/oracle/initbak0808.bak' from spfile;
$ scp orapwora11g 10.10.10.41:/u01/app/oracle/product/11.2.0/db/dbs/orapwdgora11g
$ scp orapwora11g 10.10.10.47:/u01/app/oracle/product/11.2.0/db/dbs/orapwsbora11g
备库1配置
第一个备库（10.10.10.41）
静态监听配置
$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER=
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = dgora11g)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db)
(SID_NAME = dgora11g)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = ora11gdg)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
启动监听
$ lsnrctl start
$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 12-AUG-2024 14:57:07
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 12-AUG-2024 10:49:21
Uptime 0 days 4 hr. 7 min. 46 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/db/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/ora11gdg/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora11gdg)(PORT=1521)))
Services Summary...
Service "dgora11g" has 2 instance(s).
Instance "dgora11g", status UNKNOWN, has 1 handler(s) for this service...
Instance "dgora11g", status READY, has 1 handler(s) for this service...
Service "ora11g" has 1 instance(s).
Instance "dgora11g", status READY, has 1 handler(s) for this service...
Service "ora11gXDB" has 1 instance(s).
Instance "dgora11g", status READY, has 1 handler(s) for this service...
The command completed successfully
tnsnames.ora配置
$ cat tnsnames.ora
ORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.160)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ora11g)
)
)
DGORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.41)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = dgora11g)
)
)
SBORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.47)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = sbora11g)
)
)
修改pfile
$ cat ora11gdg.txt
*.audit_file_dest='/u01/app/oracle/admin/dgora11g/adump'
*.audit_trail='NONE'
*.compatible='11.2.0.4.0'
*.control_file_record_keep_time=31
*.control_files='/u01/oradata/dgora11g/control01.ctl','/u01/app/oracle/fast_recovery_area/dgora11g/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_file_name_convert='/u01/oradata/ora11g','/u01/oradata/dgora11g'
*.db_files=5000
*.db_name='ora11g'
*.db_recovery_file_dest_size=5368709120
*.db_recovery_file_dest='/u01/app/oracle/fast_recovery_area'
*.db_unique_name='dgora11g'
*.deferred_segment_creation=FALSE
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=ora11gXDB)'
*.enable_ddl_logging=TRUE
*.event='28401 trace name context forever,level 1','10949 trace name context forever,level 1'
*.fal_client='dgora11g'
*.fal_server='ora11g'
*.log_archive_config='DG_CONFIG=(ora11g,dgora11g)'
*.log_archive_dest_1='location=/u01/oradata/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=dgora11g'
*.log_archive_dest_2='SERVICE=ora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=ora11g'
*.log_archive_dest_state_1='ENABLE'
*.log_archive_dest_state_2='ENABLE'
*.log_archive_format='%t_%s_%r.dbf'
*.log_file_name_convert='/u01/oradata/ora11g','/u01/oradata/dgora11g'
*.open_cursors=1000
*.parallel_max_servers=64
*.pga_aggregate_target=924844032
*.processes=2000
*.remote_login_passwordfile='EXCLUSIVE'
*.resource_limit=TRUE
*.resource_manager_plan='force:'
*.sec_case_sensitive_logon=FALSE
*.service_names='ora11g'
*.session_cached_cursors=300
*.sga_max_size=3700424704
*.sga_target=3700424704
*.standby_file_management='AUTO'
*.undo_retention=10800
*.undo_tablespace='UNDOTBS1'
##主要修改DG相关的参数，及添加db_unique_name、service_names
启动到nomount状态
--创建相关目录
[oracle@ora11gdg:~]$ mkdir -p /u01/app/oracle/admin/dgora11g/adump
[oracle@ora11gdg:~]$ mkdir -p /u01/oradata/dgora11g
[oracle@ora11gdg:~]$ mkdir -p /u01/app/oracle/fast_recovery_area/dgora11g
[oracle@ora11gdg:~]$ mkdir -p /u01/oradata/dgora11g
[oracle@ora11gdg:~]$ mkdir -p /u01/oradata/archivelog
--启动到nomount状态
[oracle@ora11gdg:~]$ export ORACLE_SID=dgora11g
[oracle@ora11gdg:~]$ env|grep SID
ORACLE_SID=dgora11g
[oracle@ora11gdg:~]$ sqlplus / as sysdba
SQL> startup nomount pfile='/home/oracle/ora11gdg.txt';
ORACLE instance started.
Total System Global Area 3691200512 bytes
Fixed Size 2258680 bytes
Variable Size 1392511240 bytes
Database Buffers 2281701376 bytes
Redo Buffers 14729216 bytes
SQL> create spfile from pfile='/home/oracle/ora11gdg.txt';
rman duplicate创建备库
rman target sys/oracle@ORA11G auxiliary sys/oracle@DGORA11G
RMAN> duplicate target database for standby from active database nofilenamecheck dorecover;
需要限速时，用以下命令：
run {
allocate channel c1 type disk rate 200M;
allocate channel c2 type disk rate 200M;
allocate channel c3 type disk rate 200M;
allocate auxiliary channel st1 type disk rate 200M;
allocate auxiliary channel st2 type disk rate 200M;
allocate auxiliary channel st3 type disk rate 200M;
duplicate target database for standby from active database nofilenamecheck dorecover;
release channel c1;
release channel c2;
release channel c3;
release channel st1;
release channel st2;
release channel st3;
}
开启同步
SQL> select open_mode from v$database;
OPEN_MODE
------------------------------------------------------------
MOUNTED
SQL> alter database open;
Database altered.
SQL> select log_mode,open_mode ,database_role from v$database;
LOG_MODE OPEN_MODE DATABASE_ROLE
--------------- --------------- --------------------
ARCHIVELOG READ ONLY PHYSICAL STANDBY
SQL>alter database recover managed standby database using current logfile disconnect from session;
sys@dgora11g> select log_mode,open_mode ,database_role from v$database;
LOG_MODE OPEN_MODE DATABASE_ROLE
------------ -------------------- ----------------
ARCHIVELOG READ ONLY WITH APPLY PHYSICAL STANDBY
--查看同步情况
col error for a50;
set linesize 400;
select status,error,gap_status from v$archive_dest_status;
select severity,error_code,to_char(timestamp,'DD-MON-YYYY HH24:MI:SS') "timestamp" , message from v$dataguard_status where dest_id=2;
set linesize 400;
select 'thread:' || a.thread# || ',primary sequence:' || b.max_available || ',primary sequence:' ||
a.max_applied , b.max_available - a.max_applied log_gap
from (select thread#, max(sequence#) max_applied
from gv$archived_log
where applied = 'YES'
group by thread#) a,
(select thread#, max(sequence#) max_available
from gv$archived_log
group by thread#) b
where a.thread# = b.thread#;
备库2配置
第二个备库（10.10.10.47）
静态监听配置
$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER=
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = sbora11g)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db)
(SID_NAME = sbora11g)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = ora11gdg2)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
启动监听
$ lsnrctl start
$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 08-AUG-2024 16:54:52
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date 08-AUG-2024 16:37:43
Uptime 0 days 0 hr. 17 min. 8 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/db/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/ora11gdg2/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ora11gdg2)(PORT=1521)))
Services Summary...
Service "ora11g" has 1 instance(s).
Instance "sbora11g", status BLOCKED, has 1 handler(s) for this service...
Service "sbora11g" has 2 instance(s).
Instance "sbora11g", status UNKNOWN, has 1 handler(s) for this service...
Instance "sbora11g", status BLOCKED, has 1 handler(s) for this service...
The command completed successfully
tnsnames.ora 配置
$ cat tnsnames.ora
ORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.160)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ora11g)
)
)
DGORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.41)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = dgora11g)
)
)
SBORA11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.47)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = sbora11g)
)
)
修改pfile
$ cat sbora11g.txt
*.audit_file_dest='/u01/app/oracle/admin/sbora11g/adump'
*.audit_trail='NONE'
*.compatible='11.2.0.4.0'
*.control_file_record_keep_time=31
*.control_files='/u01/oradata/sbora11g/control01.ctl','/u01/app/oracle/fast_recovery_area/sbora11g/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_file_name_convert='/u01/oradata/ora11g','/u01/oradata/sbora11g'
*.db_files=5000
*.db_name='ora11g'
*.db_recovery_file_dest_size=5368709120
*.db_recovery_file_dest='/u01/app/oracle/fast_recovery_area'
*.db_unique_name='sbora11g'
*.deferred_segment_creation=FALSE
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=ora11gXDB)'
*.enable_ddl_logging=TRUE
*.event='28401 trace name context forever,level 1','10949 trace name context forever,level 1'
*.fal_client='sbora11g'
*.fal_server='ora11g'
*.log_archive_config='DG_CONFIG=(ora11g,sbora11g)'
*.log_archive_dest_1='location=/u01/oradata/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=sbora11g'
*.log_archive_dest_2='SERVICE=ora11g LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=ora11g'
*.log_archive_dest_state_1='ENABLE'
*.log_archive_dest_state_2='ENABLE'
*.log_archive_format='%t_%s_%r.dbf'
*.log_file_name_convert='/u01/oradata/ora11g','/u01/oradata/sbora11g'
*.open_cursors=1000
*.parallel_max_servers=64
*.pga_aggregate_target=924844032
*.processes=2000
*.remote_login_passwordfile='EXCLUSIVE'
*.resource_limit=TRUE
*.resource_manager_plan='force:'
*.sec_case_sensitive_logon=FALSE
*.service_names='ora11g'
*.session_cached_cursors=300
*.sga_max_size=3700424704
*.sga_target=3700424704
*.standby_file_management='AUTO'
*.undo_retention=10800
*.undo_tablespace='UNDOTBS1'
##主要修改DG相关的参数，及添加db_unique_name、service_names
启动到nomount状态
--创建相关目录
[oracle@ora11gdg2:~]$ mkdir -p /u01/app/oracle/admin/sbora11g/adump
[oracle@ora11gdg2:~]$ mkdir -p /u01/oradata/sbora11g
[oracle@ora11gdg2:~]$ mkdir -p /u01/app/oracle/fast_recovery_area/sbora11g
[oracle@ora11gdg2:~]$ mkdir -p /u01/oradata/sbora11g
[oracle@ora11gdg2:~]$ mkdir -p /u01/oradata/archivelog
--启动到nomount状态
[oracle@ora11gdg2:~]$ export ORACLE_SID=sbora11g
[oracle@ora11gdg2:~]$ env|grep SID
ORACLE_SID=sbora11g
[oracle@ora11gdg2:~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Thu Aug 8 16:51:37 2024
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup nomount pfile='/home/oracle/sbora11g.txt';
ORACLE instance started.
Total System Global Area 3691200512 bytes
Fixed Size 2258680 bytes
Variable Size 1392511240 bytes
Database Buffers 2281701376 bytes
Redo Buffers 14729216 bytes
SQL> create spfile from pfile='/home/oracle/sbora11g.txt';
rman duplicate创建备库
$ rman target sys/oracle@ORA11G auxiliary sys/oracle@SBORA11G
Recovery Manager: Release 11.2.0.4.0 - Production on Thu Aug 8 16:58:17 2024
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORA11G (DBID=260591189)
connected to auxiliary database: ORA11G (not mounted)
RMAN> duplicate target database for standby from active database nofilenamecheck dorecover;
需要限速时，用以下命令：
run {
allocate channel c1 type disk rate 200M;
allocate channel c2 type disk rate 200M;
allocate channel c3 type disk rate 200M;
allocate auxiliary channel st1 type disk rate 200M;
allocate auxiliary channel st2 type disk rate 200M;
allocate auxiliary channel st3 type disk rate 200M;
duplicate target database for standby from active database nofilenamecheck dorecover;
release channel c1;
release channel c2;
release channel c3;
release channel st1;
release channel st2;
release channel st3;
}
开启同步
SQL> select open_mode from v$database;
OPEN_MODE
------------------------------------------------------------
MOUNTED
SQL> alter database open;
Database altered.
SQL> select log_mode,open_mode ,database_role from v$database;
LOG_MODE OPEN_MODE DATABASE_ROLE
--------------- --------------- --------------------
ARCHIVELOG READ ONLY PHYSICAL STANDBY
SQL>alter database recover managed standby database using current logfile disconnect from session;
sys@sbora11g > select log_mode,open_mode ,database_role from v$database;
LOG_MODE OPEN_MODE DATABASE_ROLE
------------ -------------------- ----------------
ARCHIVELOG READ ONLY WITH APPLY PHYSICAL STANDBY
--查看同步情况
col error for a50;
set linesize 400;
select status,error,gap_status from v$archive_dest_status;
select severity,error_code,to_char(timestamp,'DD-MON-YYYY HH24:MI:SS') "timestamp" , message from v$dataguard_status where dest_id=2;
set linesize 400;
select 'thread:' || a.thread# || ',primary sequence:' || b.max_available || ',primary sequence:' ||
a.max_applied , b.max_available - a.max_applied log_gap
from (select thread#, max(sequence#) max_applied
from gv$archived_log
where applied = 'YES'
group by thread#) a,
(select thread#, max(sequence#) max_available
from gv$archived_log
group by thread#) b
where a.thread# = b.thread#;
同步测试
–主库创建表插入测试数据
sys@sbora11g > create table tt0812 as select * from dba_objects;
Table created.
–两备库查询
sys@dgora11g> select count(*) from tt0812;
COUNT(*)
----------
86269
sys@sbora11g > select count(*) from tt0812;
COUNT(*)
----------
86269
至此主从切换已完成，新主库应与两从库正常同步。
后续工作
–创建数据库启动服务
# cat /etc/oratab
# cat /etc/init.d/oracle
#!/bin/bash
#
#################FUNCTION#############
#
# AutoStart Oracle and listener Using dbstart
# AutoStop Oracle and listener Using dbstop
#
#####################################
#
#chkconfig: 345 99 10
#description: script for the Oracle Instance, Listener
source /home/oracle/.bash_profile
ORACLE_HOME=/u01/app/oracle/product/11.2.0/db
LOG=/var/log/oracle.log
case "$1" in
start)
echo "Starting Oracle Databases ... "
echo "-------------------------------------------------" >> $LOG 2>&1
date +" %T %a %D : Starting Oracle Databasee as part of system up." >> $LOG 2>&1
su - oracle -c "$ORACLE_HOME/bin/dbstart" >> $LOG 2>&1
echo "Done."
date +" %T %a %D : Finished." >> $LOG 2>&1
echo "-------------------------------------------------" >> $LOG 2>&1
touch /var/lock/subsys/oracle
echo "Recovering Oracle Databases ... "
su - oracle -c 'sqlplus -s / as sysdba <<EOF
whenever sqlerror exit sql.sqlcode;
set echo off
set heading off
host echo "Database open mode is:"
select open_mode from v\$database;
host echo "Recovering Oracle Databases......"
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
host echo "Database open mode is:"
select open_mode from v\$database;
exit;
EOF
'
;;
stop)
echo "Stopping Oracle Databases ... "
echo "-------------------------------------------------" >> $LOG 2>&1
date +" %T %a %D : Stopping Oracle Databases as part of system down." >> $LOG 2>&1
su - oracle -c "$ORACLE_HOME/bin/dbshut" >> $LOG 2>&1
echo "Done."
date +" %T %a %D : Finished." >> $LOG 2>&1
echo "-------------------------------------------------" >> $LOG 2>&1
rm -f /var/lock/subsys/oracle
;;
restart)
$0 stop
$0 start
;;
*)
echo "Usage: oracle {start|stop|restart}"
exit 1
esac
# chmod +x /etc/init.d/oracle
# chkconfig --add oracle
cat /etc/oratab
sbora11g:/u01/app/oracle/product/11.2.0/db:Y
cat /etc/init.d/oracle
#!/bin/bash
#
#################FUNCTION#############
#
AutoStart Oracle and listener Using dbstart
AutoStop Oracle and listener Using dbstop
#
#####################################
#
#chkconfig: 345 99 10
#description: script for the Oracle Instance, Listener
source /home/oracle/.bash_profile
ORACLE_HOME=/u01/app/oracle/product/11.2.0/db
LOG=/var/log/oracle.log
case "$1" in
start)
echo "Starting Oracle Databases ... "
echo "-------------------------------------------------" >> $LOG 2>&1
date +" %T %a %D : Starting Oracle Databasee as part of system up." >> $LOG 2>&1
su - oracle -c "$ORACLE_HOME/bin/dbstart" >> $LOG 2>&1
echo "Done."
date +" %T %a %D : Finished." >> $LOG 2>&1
echo "-------------------------------------------------" >> $LOG 2>&1
touch /var/lock/subsys/oracle
echo "Recovering Oracle Databases ... "
su - oracle -c 'sqlplus -s / as sysdba <<EOF
whenever sqlerror exit sql.sqlcode;
set echo off
set heading off
host echo "Database open mode is:"
select open_mode from v\$database;
host echo "Recovering Oracle Databases......"
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
host echo "Database open mode is:"
select open_mode from v\$database;
exit;
EOF
'
;;
stop)
echo "Stopping Oracle Databases ... "
echo "-------------------------------------------------" >> $LOG 2>&1
date +" %T %a %D : Stopping Oracle Databases as part of system down." >> $LOG 2>&1
su - oracle -c "$ORACLE_HOME/bin/dbshut" >> $LOG 2>&1
echo "Done."
date +" %T %a %D : Finished." >> $LOG 2>&1
echo "-------------------------------------------------" >> $LOG 2>&1
rm -f /var/lock/subsys/oracle
;;
restart)
$0 stop
$0 start
;;
*)
echo "Usage: oracle {start|stop|restart}"
exit 1
esac
# chmod +x /etc/init.d/oracle
# chkconfig --add oracle
–备库配置归档删除脚本
$ cat /home/oracle/scripts/del_arch.sh
#!/bin/bash
source ~/.bash_profile
deltime=$(date +"20%y%m%d%H%M%S")
rman target / nocatalog msglog /home/oracle/scripts/del_arch_$deltime.log <<-EOF
crosscheck archivelog all;
delete noprompt archivelog until time 'sysdate-7';
delete noprompt force archivelog until time 'SYSDATE-10';
EOF
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