Oracle 11.2.0.4 Data Guard 部署练习【一主一备/单机】

Oracle DG 理论及实验笔记

DATAGUARD 是通过建立一个 PRIMARY 和 STANDBY 组来确立其参照关系。
STANDBY 一旦创建， DATAGUARD 就会通过将主数据库 (PRIMARY) 的 REDO 传递给 STANDBY 数据库，然后在 STANDBY 中应用 REDO 实现数据库的同步。

有两种类型的 STANDBY ：物理 STANDBY 和逻辑 STANDBY 。

物理 STANDBY 提供与主数据库完全一样的拷贝（块到块），数据库 SCHEMA ，包括索引都是一样的。它是直接应用 REDO 实现同步的。逻辑 STANDBY 则不是这样，在逻辑 STANDBY 中，逻辑信息是相同的，但物理组织和数据结构可以不同，它和主库保持同步的方法是将接收的 REDO 转换成 SQL 语句，然后在 STANDBY 上执行 SQL 语句。逻辑 STANDBY 除灾难恢复外还有其它用途，比如用于用户进行查询和报表。

安装环境：

在主库 --primary 上搭建数据库软件，建立监听，采用 dbca 搭建实例；

在备库 --standby 上搭建数据库软件，建立监听，但是不需要建立实例。

在 linux 上搭建 oracle 数据库，过程略。

步骤概述：

1.主库开启归档并设置快速恢复区；
2.主库创建归档同步目录；
3.主库添加 STANDBY 日志文件；
4.主备皆配置网络 --- 监听配置文件；
5.将主库的密码文件传输到备库；
6.修改主库的参数文件传输到备库，需修改部分信息；
7.以动态参数文件的形式启动备库数据库；
8.主库登录 RMAN ，【 duplicate 】复制数据库；

1.主备库配置
1.1创建归档同步目录

[oracle@test1 ~]$ mkdir -p /home/oracle/flash

[oracle@test2 ~]$ mkdir -p /home/oracle/flash

1.2开启归档并设置快速恢复区

alter system set db_recovery_file_dest='/home/oracle/flash';

alter system set db_recovery_file_dest_size=4G;

alter database archivelog;

1.3主库添加 STANDBY 日志文件

alter database add standby logfile group 4 '/home/oracle/s1.log' size 50M;

alter database add standby logfile group 5 '/home/oracle/s2.log' size 50M;

alter database add standby logfile group 6 '/home/oracle/s3.log' size 50M;

alter database add standby logfile group 7 '/home/oracle/s4.log' size 50M;

1.4主备库修改监听配置文件

[oracle@test1 ~]$ cd /u01/app/oracle/product/11.2.0/db_1/network/admin/

[oracle@test1 admin]$ cat listener.ora

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora

# Generated by Oracle configuration tools.

LISTENER =

  (DESCRIPTION_LIST =

    (DESCRIPTION =

      (ADDRESS = (PROTOCOL = TCP)(HOST = test1.us.oracle.com)(PORT = 1521))

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

    )

  )

ADR_BASE_LISTENER = /u01/app/oracle

SID_LIST_LISTENER=

  (SID_LIST=

    (SID_DESC=

      (GLOBAL_DBNAME=PROD1)

      (ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1)

      (SID_NAME=PROD1))

)

[oracle@test1 admin]$ cat tnsnames.ora

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora

# Generated by Oracle configuration tools.

PROD1 =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = test1.us.oracle.com)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVICE_NAME = PROD1)

    )

  )

PROD1_S =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = test2.us.oracle.com)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVICE_NAME = PROD1)

    )

  )

启动监听，并测试服务名网络的通畅。两台主机均需测试两个服务名（此省略主库的测试）：

[oracle@test1 admin]$ lsnrctl start

[oracle@test2 admin]$ lsnrctl start

[oracle@test2 admin]$ tnsping prod1

TNS Ping Utility for Linux: Version 11.2.0.4.0 - Production on 25-FEB-2019 11:46:06

Copyright (c) 1997, 2013, Oracle.  All rights reserved.

Used parameter files:

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = test1.us.oracle.com)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = PROD1)))

OK (0 msec)

[oracle@test2 admin]$ tnsping prod1_s

TNS Ping Utility for Linux: Version 11.2.0.4.0 - Production on 25-FEB-2019 11:47:04

Copyright (c) 1997, 2013, Oracle.  All rights reserved.

Used parameter files:

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = test2.us.oracle.com)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = PROD1)))

OK (0 msec)

1.5传输密码文件

[oracle@test1 dbs]$ cd $ORACLE_HOME/dbs

[oracle@test1 dbs]$ ls

hc_PROD1.dat  init.ora  lkPROD1  orapwPROD1  spfilePROD1.ora

[oracle@test1 dbs]$ scp orapwPROD1 test2:/u01/app/oracle/product/11.2.0/dbhome_1/dbs

oracle@test2's password:

orapwPROD1                                      100% 1536     1.5KB/s   00:00

1.6修改参数文件配置

[oracle@test1 dbs]$ ls

hc_PROD1.dat  init.ora  initPROD1.ora  lkPROD1  orapwPROD1  spfilePROD1.ora

[oracle@test1 dbs]$ cat initPROD1.ora

PROD1.__db_cache_size=260046848

PROD1.__java_pool_size=4194304

PROD1.__large_pool_size=8388608

PROD1.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment

PROD1.__pga_aggregate_target=398458880

PROD1.__sga_target=390070272

PROD1.__shared_io_pool_size=0

PROD1.__shared_pool_size=104857600

PROD1.__streams_pool_size=0

*.audit_file_dest='/u01/app/oracle/admin/PROD1/adump'

*.audit_trail='db'

*.compatible='11.2.0.4.0'

*.control_files='/u01/app/oracle/oradata/PROD1/control01.ctl','/u01/app/oracle/fast_recovery_area/PROD1/control02.ctl'

*.db_block_size=8192

*.db_domain=''

*.db_name='PROD1'

*.db_recovery_file_dest='/home/oracle/flash'

*.db_recovery_file_dest_size=4294967296

*.diagnostic_dest='/u01/app/oracle'

*.dispatchers='(PROTOCOL=TCP) (SERVICE=PROD1XDB)'

*.memory_target=786432000

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.undo_tablespace='UNDOTBS1'

DB_UNIQUE_NAME=PROD1

LOG_ARCHIVE_CONFIG='DG_CONFIG=(PROD1,LEILEI)'

LOG_ARCHIVE_DEST_1=

 'LOCATION=/home/oracle/flash

  VALID_FOR=(ALL_LOGFILES,ALL_ROLES)

  DB_UNIQUE_NAME=PROD1'

LOG_ARCHIVE_DEST_2=

 'SERVICE=PROD1_S ASYNC

  VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)

  DB_UNIQUE_NAME=LEILEI'

LOG_ARCHIVE_DEST_STATE_1=ENABLE

LOG_ARCHIVE_DEST_STATE_2=ENABLE

REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE

LOG_ARCHIVE_FORMAT=%t_%s_%r.arc

LOG_ARCHIVE_MAX_PROCESSES=30

FAL_SERVER=PROD1

STANDBY_FILE_MANAGEMENT=AUTO

传输静态参数文件到备库：

[oracle@test1 dbs]$ scp initPROD1.ora test2:/u01/app/oracle/product/11.2.0/dbhome_1/dbs

oracle@test2's password:

initPROD1.ora                                  100% 1399     1.4KB/s   00:00

在备库上修改静态参数文件：

[oracle@test2 dbs]$ cat initPROD1.ora

*.control_files='/u01/app/oracle/oradata/PROD1/control01.ctl','/u01/app/oracle/fast_recovery_area/PROD1/control02.ctl'

*.db_block_size=8192

*.db_domain=''

*.db_name='PROD1'

*.db_recovery_file_dest='/home/oracle/flash'

*.db_recovery_file_dest_size=4294967296

*.diagnostic_dest='/u01/app/oracle'

*.dispatchers='(PROTOCOL=TCP) (SERVICE=PROD1XDB)'

*.memory_target=786432000

*.open_cursors=300

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.undo_tablespace='UNDOTBS1'

DB_UNIQUE_NAME=LEILEI

LOG_ARCHIVE_CONFIG='DG_CONFIG=(LEILEI,PROD1)'

LOG_ARCHIVE_DEST_1=

 'LOCATION=/home/oracle/flash

  VALID_FOR=(ALL_LOGFILES,ALL_ROLES)

  DB_UNIQUE_NAME=LEILEI'

LOG_ARCHIVE_DEST_2=

 'SERVICE=PROD1 ASYNC

  VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)

  DB_UNIQUE_NAME=PROD1'

LOG_ARCHIVE_DEST_STATE_1=ENABLE

LOG_ARCHIVE_DEST_STATE_2=ENABLE

REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE

LOG_ARCHIVE_FORMAT=%t_%s_%r.arc

LOG_ARCHIVE_MAX_PROCESSES=30

FAL_SERVER=PROD1

STANDBY_FILE_MANAGEMENT=AUTO

1.7在备库上，创建静态参数文件中对应的目录文件夹

[oracle@test2 dbs]$

mkdir -p /home/oracle/flash

mkdir -p /u01/app/oracle/admin/PROD1/adump

mkdir -p /u01/app/oracle/oradata/PROD1

mkdir -p /u01/app/oracle/fast_recovery_area/PROD1

1.8启动备库到【 nomount 】阶段

[oracle@test2 ~]$ export ORACLE_SID=PROD1

[oracle@test2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 25 13:59:23 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SYS@PROD1 >startup nomount;

ORACLE instance started.

Total System Global Area 1219260416 bytes

Fixed Size           2252744 bytes

Variable Size       788529208 bytes

Database Buffers        419430400 bytes

Redo Buffers         9048064 bytes

1.9主库登录 RMAN ，复制数据库

[oracle@test1 ~]$ rman target sys/oracle@prod1 auxiliary sys/oracle@prod1_s

RMAN> duplicate target database for standby from active database nofilenamecheck;

  1 [oracle@test1 ~]$ rman target sys/oracle@prod1 auxiliary sys/oracle@prod1_s

  2

  3 Recovery Manager: Release 11.2.0.4.0 - Production on Mon Feb 25 13:43:23 2019

  4 Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

  5 connected to target database: PROD1 (DBID=2222506242)

  6 connected to auxiliary database: PROD1 (not mounted)

  7

  8 RMAN> duplicate target database for standby from active database nofilenamecheck;

  9

 10 Starting Duplicate Db at 2019-02-25 13:43:31

 11 using target database control file instead of recovery catalog

 12 allocated channel: ORA_AUX_DISK_1

 13 channel ORA_AUX_DISK_1: SID=10 device type=DISK

 14 contents of Memory Script:

 15 {

 16    backup as copy reuse

 17    targetfile  '/u01/app/oracle/product/11.2.0/db_1/dbs/orapwPROD1' auxiliary format

 18  '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapwPROD1'   ;

 19 }

 20 executing Memory Script

 21

 22 Starting backup at 2019-02-25 13:43:32

 23 allocated channel: ORA_DISK_1

 24 channel ORA_DISK_1: SID=17 device type=DISK

 25 Finished backup at 2019-02-25 13:43:33

 26

 27 contents of Memory Script:

 28 {

 29    backup as copy current controlfile for standby auxiliary format  '/u01/app/oracle/oradata/PROD1/control01.ctl';

 30    restore clone controlfile to  '/u01/app/oracle/fast_recovery_area/PROD1/control02.ctl' from

 31  '/u01/app/oracle/oradata/PROD1/control01.ctl';

 32 }

 33 executing Memory Script

 34

 35 Starting backup at 2019-02-25 13:43:33

 36 using channel ORA_DISK_1

 37 channel ORA_DISK_1: starting datafile copy

 38 copying standby control file

 39 output file name=/u01/app/oracle/product/11.2.0/db_1/dbs/snapcf_PROD1.f tag=TAG20190225T134333 RECID=2 STAMP=1001166214

 40 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03

 41 Finished backup at 2019-02-25 13:43:36

 42

 43 Starting restore at 2019-02-25 13:43:36

 44 using channel ORA_AUX_DISK_1

 45

 46 channel ORA_AUX_DISK_1: copied control file copy

 47 Finished restore at 2019-02-25 13:43:37

 48

 49 contents of Memory Script:

 50 {

 51    sql clone 'alter database mount standby database';

 52 }

 53 executing Memory Script

 54

 55 sql statement: alter database mount standby database

 56

 57 contents of Memory Script:

 58 {

 59    set newname for tempfile  1 to

 60  "/u01/app/oracle/oradata/PROD1/temp01.dbf";

 61    switch clone tempfile all;

 62    set newname for datafile  1 to

 63  "/u01/app/oracle/oradata/PROD1/system01.dbf";

 64    set newname for datafile  2 to

 65  "/u01/app/oracle/oradata/PROD1/sysaux01.dbf";

 66    set newname for datafile  3 to

 67  "/u01/app/oracle/oradata/PROD1/undotbs01.dbf";

 68    set newname for datafile  4 to

 69  "/u01/app/oracle/oradata/PROD1/users01.dbf";

 70    set newname for datafile  5 to

 71  "/u01/app/oracle/oradata/PROD1/example01.dbf";

 72    backup as copy reuse

 73    datafile  1 auxiliary format

 74  "/u01/app/oracle/oradata/PROD1/system01.dbf"   datafile

 75  2 auxiliary format

 76  "/u01/app/oracle/oradata/PROD1/sysaux01.dbf"   datafile

 77  3 auxiliary format

 78  "/u01/app/oracle/oradata/PROD1/undotbs01.dbf"   datafile

 79  4 auxiliary format

 80  "/u01/app/oracle/oradata/PROD1/users01.dbf"   datafile

 81  5 auxiliary format

 82  "/u01/app/oracle/oradata/PROD1/example01.dbf"   ;

 83    sql 'alter system archive log current';

 84 }

 85 executing Memory Script

 86

 87 executing command: SET NEWNAME

 88

 89 renamed tempfile 1 to /u01/app/oracle/oradata/PROD1/temp01.dbf in control file

 90

 91 executing command: SET NEWNAME

 92

 93 executing command: SET NEWNAME

 94

 95 executing command: SET NEWNAME

 96

 97 executing command: SET NEWNAME

 98

 99 executing command: SET NEWNAME

100

101 Starting backup at 2019-02-25 13:43:43

102 using channel ORA_DISK_1

103 channel ORA_DISK_1: starting datafile copy

104 input datafile file number=00001 name=/u01/app/oracle/oradata/PROD1/system01.dbf

105 output file name=/u01/app/oracle/oradata/PROD1/system01.dbf tag=TAG20190225T134343

106 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:45

107 channel ORA_DISK_1: starting datafile copy

108 input datafile file number=00002 name=/u01/app/oracle/oradata/PROD1/sysaux01.dbf

109 output file name=/u01/app/oracle/oradata/PROD1/sysaux01.dbf tag=TAG20190225T134343

110 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:25

111 channel ORA_DISK_1: starting datafile copy

112 input datafile file number=00005 name=/u01/app/oracle/oradata/PROD1/example01.dbf

113 output file name=/u01/app/oracle/oradata/PROD1/example01.dbf tag=TAG20190225T134343

114 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15

115 channel ORA_DISK_1: starting datafile copy

116 input datafile file number=00003 name=/u01/app/oracle/oradata/PROD1/undotbs01.dbf

117 output file name=/u01/app/oracle/oradata/PROD1/undotbs01.dbf tag=TAG20190225T134343

118 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07

119 channel ORA_DISK_1: starting datafile copy

120 input datafile file number=00004 name=/u01/app/oracle/oradata/PROD1/users01.dbf

121 output file name=/u01/app/oracle/oradata/PROD1/users01.dbf tag=TAG20190225T134343

122 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01

123 Finished backup at 2019-02-25 13:45:16

124

125 sql statement: alter system archive log current

126

127 contents of Memory Script:

128 {

129    switch clone datafile all;

130 }

131 executing Memory Script

132

133 datafile 1 switched to datafile copy

134 input datafile copy RECID=2 STAMP=1001167339 file name=/u01/app/oracle/oradata/PROD1/system01.dbf

135 datafile 2 switched to datafile copy

136 input datafile copy RECID=3 STAMP=1001167339 file name=/u01/app/oracle/oradata/PROD1/sysaux01.dbf

137 datafile 3 switched to datafile copy

138 input datafile copy RECID=4 STAMP=1001167339 file name=/u01/app/oracle/oradata/PROD1/undotbs01.dbf

139 datafile 4 switched to datafile copy

140 input datafile copy RECID=5 STAMP=1001167339 file name=/u01/app/oracle/oradata/PROD1/users01.dbf

141 datafile 5 switched to datafile copy

142 input datafile copy RECID=6 STAMP=1001167339 file name=/u01/app/oracle/oradata/PROD1/example01.dbf

2.检查主备搭建情况
2.1主库

[oracle@test1 ~]$ export ORACLE_SID=PROD1

[oracle@test1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 25 13:46:56 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

READ WRITE                              PRIMARY                              SESSIONS ACTIVE

SYS@PROD1 >select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES  BLOCKSIZE   MEMBERS ARCHIV STATUS                         FIRST_CHANGE# FIRST_TIME          NEXT_CHANGE# NEXT_TIME

---------- ---------- ---------- ---------- ---------- ---------- ------ -------------------------------- ------------- ------------------- ------------ -------------------

 1   1   16  52428800  512  1 NO   CURRENT       996478 2019-02-25 14:19:03      2.8147E+14

 2   1   14  52428800  512  1 YES   INACTIVE      996073 2019-02-25 14:12:33      996161 2019-02-25 14:13:55

 3   1   15  52428800  512  1 YES   ACTIVE       996161 2019-02-25 14:13:55      996478 2019-02-25 14:19:03

2.2备库

[oracle@test2 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 25 14:04:36 2019

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

MOUNTED                                 PHYSICAL STANDBY                 RECOVERY NEEDED

备库处于MOUNTED模式下，只能开启实时应用在线日志或者归档日志。

SYS@PROD1 >select PROCESS,STATUS,SEQUENCE# from v$managed_standby;

PROCESS            STATUS         SEQUENCE#

------------------   ----------------------     -----------------

ARCH           CLOSING                15

ARCH          CONNECTED                0

......

ARCH          CONNECTED                0

ARCH          CONNECTED                0

ARCH          CONNECTED                0

RFS               IDLE                0

RFS               IDLE                0

RFS             IDLE                16

33 rows selected.

SYS@PROD1 >alter database open;

Database altered.

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE   DATABASE_ROLE     SWITCHOVER_STATUS

------------- -----------------  -------------------

READ ONLY   PHYSICAL STANDBY  NOT ALLOWED

3.测试主备功能及切换应用
Ø 测试1

Test1：

SYS@PROD1 >create table t1 (id number);

Table created.

Test2：

SYS@PROD1 >desc t1

ERROR:

ORA-04043: object t1 does not exist

SYS@PROD1 >recover managed standby database disconnect;

Media recovery complete.

SYS@PROD1 >desc t1

ERROR:

ORA-04043: object t1 does not exist

Test1：

SYS@PROD1 >alter system switch logfile;

System altered.

Test2：

SYS@PROD1 >desc t1

 Name                                                                                                                                                                                   Null?  Type

 ----------------------------------------

 ID               NUMBER

Ø 测试 2------11G 新特性：ADG

Test2：

SYS@PROD1 >recover managed standby database cancel;

Media recovery complete.

SYS@PROD1 >recover managed standby database using current logfile disconnect from session;

Media recovery complete.

Test1：

SYS@PROD1 >create table t2 (id number);

Table created.

Test2：

SYS@PROD1 >desc t2

 Name                                                                                                                                                                                   Null?  Type

 -----------------------------------

 ID                          NUMBER

Ø 测试 3-------角色切换

以下为 Data Guard 最为重要的两个功能：参考博客

3.3.1

TEST1:

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

READ WRITE                              PRIMARY                          TO STANDBY

SYS@PROD1 >alter database commit to switchover to physical standby;

Database altered.

SYS@PROD1 >conn / as sysdba;

Connected to an idle instance.

SYS@PROD1 >startup

ORACLE instance started.

Total System Global Area 1219260416 bytes

Fixed Size             2252744 bytes

Variable Size              788529208 bytes

Database Buffers       419430400 bytes

Redo Buffers                9048064 bytes

Database mounted.

Database opened.

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

READ ONLY                                PHYSICAL STANDBY                 TO PRIMARY

3.3.2

TEST2:

SYS@PROD1 >recover managed standby database cancel;

Media recovery complete.

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

READ ONLY                                PHYSICAL STANDBY                 TO PRIMARY

SYS@PROD1 >alter database commit to switchover to primary;

Database altered.

SYS@PROD1 >select open_mode,database_role,switchover_status from v$database;

OPEN_MODE                             DATABASE_ROLE                      SWITCHOVER_STATUS

---------------------------------------- -------------------------------- ----------------------------------------

MOUNTED                                PRIMARY                          NOT ALLOWED

SYS@PROD1 >alter database open;

Database altered.

SYS@PROD1 >insert into t1 values (1);

1 row created.

SYS@PROD1 >commit;

Commit complete.

SYS@PROD1 >select * from t1;

        ID

----------

         1

TEST1:

SYS@PROD1 >select * from t1;

no rows selected

SYS@PROD1 >recover managed standby database using current logfile disconnect from session;

Media recovery complete.

SYS@PROD1 >select * from t1;                 

        ID

----------

         1

至此，Oracle RAC架构搭建完成。

如有转载，请标明出处。

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