1.試驗環(huán)境

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod

PL/SQL Release 10.2.0.1.0 - Production

CORE 10.2.0.1.0 Production

TNS for Linux: Version 10.2.0.1.0 - Production

NLSRTL Version 10.2.0.1.0 - Production

2.確認(rèn)主庫處于歸檔模式

SQL> archive log list;

Database log mode Archive Mode

Automatic archival Enabled

Archive destination /u02/arch

Oldest online log sequence 154

Next log sequence to archive 156

Current log sequence 156

3.創(chuàng)建備庫instance

windows平臺利用oradim工具創(chuàng)建一個新的instance，

unix/linux平臺設(shè)置新的ORACLE_SID即可

4.準(zhǔn)備好主備庫的參數(shù)文件

主庫：

orcl.__db_cache_size=184549376

orcl.__java_pool_size=4194304

orcl.__large_pool_size=4194304

orcl.__shared_pool_size=88080384

orcl.__streams_pool_size=0

*.audit_file_dest='/u01/oracle/admin/orcl/adump'

*.background_dump_dest='/u01/oracle/admin/orcl/bdump'

*.compatible='10.2.0.1.0'

*.control_files='/u01/oracle/oradata/orcl/control01.ctl','

/u01/oracle/oradata/orcl/control02.ctl','

/u01/oracle/oradata/orcl/control03.ctl'

*.core_dump_dest='/u01/oracle/admin/orcl/cdump'

*.db_block_size=8192

*.db_domain=''

*.db_file_multiblock_read_count=16

*.db_name='orcl'

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

*.job_queue_processes=10

*.log_archive_dest_1='LOCATION=/u02/arch'

*.log_archive_format='%t_%s_%r.dbf'

*.nls_language='SIMPLIFIED CHINESE'

*.nls_territory='CHINA'

*.open_cursors=300

*.pga_aggregate_target=94371840

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.sga_target=285212672

*.undo_management='AUTO'

*.undo_tablespace='UNDOTBS1'

*.user_dump_dest='/u01/oracle/admin/orcl/udump'

#################################

db_unique_name=node1

service_names=orcl

log_archive_config='dg_config=(node1,node2)'

log_archive_dest_2='service=dbstandby

valid_for=(online_logfiles,primary_role) db_unique_name=node2'

log_archive_dest_state_1=enable

log_archive_dest_state_2=enable

fal_server=dbstandby

standby_file_management=AUTO

備庫：

orcl.__db_cache_size=184549376

orcl.__java_pool_size=4194304

orcl.__large_pool_size=4194304

orcl.__shared_pool_size=88080384

orcl.__streams_pool_size=0

*.audit_file_dest='/u01/oracle/admin/orcl/adump'

*.background_dump_dest='/u01/oracle/admin/orcl/bdump'

*.compatible='10.2.0.1.0'

*.control_files='/u01/oracle/oradata/orcl/control01.ctl','

/u01/oracle/oradata/orcl/control02.ctl','

/u01/oracle/oradata/orcl/control03.ctl'

*.core_dump_dest='/u01/oracle/admin/orcl/cdump'

*.db_block_size=8192

*.db_domain=''

*.db_file_multiblock_read_count=16

*.db_name='orcl'

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

*.job_queue_processes=10

*.log_archive_dest_1='LOCATION=/u02/arch'

*.log_archive_format='%t_%s_%r.dbf'

*.nls_language='SIMPLIFIED CHINESE'

*.nls_territory='CHINA'

*.open_cursors=300

*.pga_aggregate_target=94371840

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.sga_target=285212672

*.undo_management='AUTO'

*.undo_tablespace='UNDOTBS1'

*.user_dump_dest='/u01/oracle/admin/orcl/udump'

#################################

db_unique_name=node2

service_names=orcl

log_archive_config='dg_config=(node1,node2)'

log_archive_dest_2='service=dbprimary

valid_for=(online_logfiles,primary_role) db_unique_name=node1'

log_archive_dest_state_1=enable

log_archive_dest_state_2=enable

fal_server=dbprimary

fal_client=dbstandby

standby_file_management=AUTO

5.生成password file

c:/>orapwd file=d:/oracle/ora92/DATABASE/PWDtest.ORA password=pass

或者直接將主庫上的密碼文件copy一份到備庫上

6.配置網(wǎng)絡(luò)

配置主備庫的listener.ora,tnsnames.ora。修改完listener.ora后需要重啟監(jiān)聽器。

主庫：

listener.ora

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = /u01/oracle/product/10.2.0)

(PROGRAM = extproc)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = s1.gti.com)(PORT = 1521))

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))

)

)

tnsnames.ora

dbprimary =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.131)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = orcl)

)

)

dbstandby =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.132)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = orcl)

)

)

備庫：

listener.ora

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = orcl)

(ORACLE_HOME = /u01/oracle/product/10.2.0)

)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.132)(PORT = 1521))

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))

)

)

tnsnames.ora

dbprimary =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.131)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = orcl)

)

)

dbstandby =

(DESCRIPTION =

(ADDRESS_LIST =

(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.132)(PORT = 1521))

)

(CONNECT_DATA =

(SERVICE_NAME = orcl)

)

)

7.使用rman備份主庫

[oracle@s1 ~]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Thu May 29 19:52:37 2008

Copyright (c) 1982, 2005, Oracle. All rights reserved.

connected to target database: ORCL (DBID=1171867028)

RMAN> backup full format='/u02/db_%U'

database include current controlfile for standby;

...................

8.歸檔主庫當(dāng)前日志

SQL> alter system archive log current;

System altered.

9.啟動備庫到nomount

sqlplus '/ as sysdba'

Connected to an idle instance.

SQL> startup nomount

Total System Global Area 285212672 bytes

Fixed Size 1218992 bytes

Variable Size 96470608 bytes

Database Buffers 184549376 bytes

Redo Buffers 2973696 bytes

10.利用rman恢復(fù)備庫

[oracle@s1 ~]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Thu May 29 19:53:21 2008

Copyright (c) 1982, 2005, Oracle. All rights reserved.

connected to target database: ORCL (DBID=1171867028)

RMAN> connect auxiliary sys/a@dbstandby

connected to auxiliary database: ORCL (DBID=1171867028, not mount)

RMAN> duplicate target database for standby nofilenamecheck;

.............................

如果第8步?jīng)]有歸檔當(dāng)前日志，duplicate時可能出現(xiàn)錯誤：

RMAN-05507: standby controlfile checkpoint (710256) is more recent than duplicat

ion point in time (709530)

至此，備庫創(chuàng)建成功。

11.將備庫置于自動恢復(fù)狀態(tài)

SQL> conn / as sysdba

Connected.

SQL>alter database recover managed standby database disconnect from session;

Media recovery complete.

12.switchover

物理STANDBY的SWITCHOVER切換會把當(dāng)前的一個物理STANDBY切換為PRIMARY數(shù)據(jù)庫，而PRIMARY數(shù)據(jù)庫且變成物理STNADBY數(shù)據(jù)庫。

一般SWITCHOVER切換都是計劃中的切換，特點是在切換后，不會丟失任何的數(shù)據(jù)，而且這個過程是可逆的，整個DATA GUARD環(huán)境不會被破壞，原來DATA GUARD環(huán)境中的所有物理和邏輯STANDBY都可以繼續(xù)工作。

在進行DATA GUARD的物理STANDBY切換前需要注意：

確認(rèn)主庫和從庫間網(wǎng)絡(luò)連接通暢；

確認(rèn)沒有活動的會話連接在數(shù)據(jù)庫中；

PRIMARY數(shù)據(jù)庫處于打開的狀態(tài)，STANDBY數(shù)據(jù)庫處于MOUNT狀態(tài)；

確保STANDBY數(shù)據(jù)庫處于ARCHIVELOG模式；

如果設(shè)置了REDO應(yīng)用的延遲，那么將這個設(shè)置去掉；

確保配置了主庫和從庫的初始化參數(shù)，使得切換完成后，DATA GUARD機制可以順利的運行。

主庫：

[oracle@s1 ~]$ sqlplus '/ as sysdba'

SQL*Plus: Release 10.2.0.1.0 - Production on Thu May 29 19:55:02 2008

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

With the Partitioning, OLAP and Data Mining options

SQL> alter database commit to switchover to physical standby;

Database altered.

SQL> shutdown immediate;

ORA-01507: database not mounted

ORACLE instance shut down.

SQL> startup nomount

ORACLE instance started.

Total System Global Area 285212672 bytes

Fixed Size 1218992 bytes

Variable Size 96470608 bytes

Database Buffers 184549376 bytes

Redo Buffers 2973696 bytes

SQL> alter database mount standby database;

Database altered.

SQL> alter database recover managed standby database disconnect from session;

Database altered.

備庫：

SQL> alter database commit to switchover to primary;

Database altered.

SQL> shutdown immediate;

ORA-01109: database not open

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 285212672 bytes

Fixed Size 1218992 bytes

Variable Size 96470608 bytes

Database Buffers 184549376 bytes

Redo Buffers 2973696 bytes

Database mounted.

Database opened.

SQL>

至此完成自由切換。