过程和Duplicate复制数据库并创建物理StandBy类似，只是不需要重启数据库。
目的：创建standby，不重启源数据库
1设定环境如下：
Primary数据库
| IP | 172.17.22.16 |
| SID | orcl |
Standby数据库
| IP | 172.17.22.17 |
| SID | orcl_standby |
设置提示，以区分操作的位置
primary数据库
set SQLPROMPT Primary>
standby数据库
set SQLPROMPT StandBy>
1、Primary端设置 归档模式+强制日志
确保primary数据库运行在归档模式
Primary>archive log list Database log mode No Archive Mode Automatic archival Disabled Archive destination USE_DB_RECOVERY_FILE_DEST Oldest online log sequence 5 Current log sequence 7 Primary>shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. Primary>startup mount ORACLE instance started. Total System Global Area 3290345472 bytes Fixed Size 2217832 bytes Variable Size 1795164312 bytes Database Buffers 1476395008 bytes Redo Buffers 16568320 bytes Database mounted. Primary>alter database archivelog; Database altered. Primary>alter database open; Database altered. Primary>archive log list Database log mode Archive Mode Automatic archival Enabled Archive destination USE_DB_RECOVERY_FILE_DEST Oldest online log sequence 5 Next log sequence to archive 7 Current log sequence 7 Primary>
开启强制日志
Primary>select force_logging from v$database; FOR --- NO Primary>alter database force logging; Database altered.
2、standby端创建相关目录
为了和Primary库保存相同的结构，我们需要在Standby数据库建立相同的目录，首先查询现有Primary数据库的相关目录
Primary>col name for a30 Primary>col value for a100 Primary>select name ,value from v$parameter where name in (‘audit_file_dest‘,‘background_dump_dest‘,‘control_files‘,‘core_dump_dest‘,‘user_dump_dest‘) ORDER BY name ASC; NAME VALUE ------------------------------ ---------------------------------------------------------------------------------------------audit_file_dest /usr/oracle/app/admin/orcl/adump background_dump_dest /usr/oracle/app/diag/rdbms/orcl/orcl/trace control_files /usr/oracle/app/oradata/orcl/control01.ctl, /usr/oracle/app/flash_recovery_area/orcl/control02.ctl core_dump_dest /usr/oracle/app/diag/rdbms/orcl/orcl/cdump user_dump_dest /usr/oracle/app/diag/rdbms/orcl/orcl/trace
在standby数据库服务器创建相同的目录
[[email protected] ~]$ mkdir -p /usr/oracle/app/admin/orcl/adump [[email protected] ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/trace [[email protected] ~]$ mkdir -p /usr/oracle/app/oradata/orcl [[email protected] ~]$ mkdir -p /usr/oracle/app/flash_recovery_area/orcl [[email protected] ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/ [[email protected] ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/trace
3、创建辅助实例密钥文件
方法一： 直接从Primary数据库复制密钥文件过来 (如果ORACLE_SID不同 需要改名)
[[email protected] dbs]$ scp orapworcl 172.17.22.17:/usr/oracle/app/product/11.2.0/dbhome_1/dbs oracle@172.17.22.17‘s password: orapworcl 100% 1536 1.5KB/s 00:00 [[email protected] dbs]$
改名
[[email protected] dbs]$ mv orapworcl orapworcl_standby
方法二： orapwd生成
orapwd FILE=/usr/oracle/app/product/11.2.0/dbhome_1/dbs/orapworcl password=wangshengzhuang entries=30;
4、生成standby端的pfile
在Primary端根据spfile生成pfile，并备份
Primary>create pfile from spfile; File created.
查询Primary库的db_unique_name
Primary>show parameter db_unique_name; NAME TYPE VALUE ------------------------------------ ---------------------- ------------------------------ db_unique_name string orcl
修改spfile参数值
-------为了不重启,沿用上面的db_unique_name
-------alter system set DB_UNIQUE_NAME=orcl scope=spfile; alter system set LOG_ARCHIVE_CONFIG=‘DG_CONFIG=(orcl,db_standby)‘ alter system set LOG_ARCHIVE_DEST_2=‘SERVICE=tns_standby ARCH VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_standby‘ alter system set LOG_ARCHIVE_DEST_STATE_2=DEFER alter system set FAL_SERVER=tns_standby alter system set FAL_CLIENT=tns_primary alter system set STANDBY_FILE_MANAGEMENT=AUTO
在Primary端根据spfile重新生成pfile，用以启动standby数据库
Primary>create pfile from spfile; File created.
复制生成的initorcl.ora到standby的$ORACLE_HOME/dbs目录下，并改名
[[email protected] dbs]$ pwd /usr/oracle/app/product/11.2.0/dbhome_1/dbs [[email protected] dbs]$ scp initorcl.ora 172.17.22.17:/usr/oracle/app/product/11.2.0/dbhome_1/dbs The authenticity of host ‘172.17.22.17 (172.17.22.17)‘ can‘t be established. RSA key fingerprint is 72:28:f5:f9:9c:f8:49:23:48:6d:9d:d4:0e:0c:89:71. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added ‘172.17.22.17‘ (RSA) to the list of known hosts. [email protected]‘s password: initorcl.ora 100% 1291 1.3KB/s 00:00 [[email protected] dbs]$
改名
[[email protected] dbs]$ mv initorcl.ora initorcl_standby.ora
修改standbyd端的initorcl_standby.ora文件，内容如下
orcl.__db_cache_size=1476395008 orcl.__java_pool_size=16777216 orcl.__large_pool_size=16777216 orcl.__oracle_base=‘/usr/oracle/app‘#ORACLE_BASE set from environment orcl.__pga_aggregate_target=1325400064 orcl.__sga_target=1979711488 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=436207616 orcl.__streams_pool_size=0 *.audit_file_dest=‘/usr/oracle/app/admin/orcl/adump‘ *.audit_trail=‘db‘ *.compatible=‘11.2.0.0.0‘ *.control_files=‘/usr/oracle/app/oradata/orcl/control01.ctl‘,‘/usr/oracle/app/flash_recovery_area/orcl/control02.ctl‘ *.db_block_size=8192 *.db_domain=‘‘ *.db_name=‘orcl‘ *.db_recovery_file_dest=‘/usr/oracle/app/flash_recovery_area‘ *.db_recovery_file_dest_size=4070572032 *.diagnostic_dest=‘/usr/oracle/app‘ *.dispatchers=‘(PROTOCOL=TCP) (SERVICE=orclXDB)‘ *.memory_target=3299868672 *.nls_language=‘SIMPLIFIED CHINESE‘ *.nls_territory=‘CHINA‘ *.open_cursors=300 *.processes=150 *.remote_login_passwordfile=‘EXCLUSIVE‘ *.undo_tablespace=‘UNDOTBS1‘ *.DB_UNIQUE_NAME=db_standby *.LOG_ARCHIVE_CONFIG=‘DG_CONFIG=(orcl,db_standby)‘ *.LOG_ARCHIVE_DEST_2=‘SERVICE=tns_primary ARCH VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orcl‘ *.LOG_ARCHIVE_DEST_STATE_2=ENABLE *.FAL_SERVER=tns_primary
*.FAL_CLIENT=tns_standby
*.STANDBY_FILE_MANAGEMENT=AUTO
通过复制的pfile创建Standby数据库的spfile
StandBy> create spfile from pfile; File created.
启动到nomount环境
SQL> startup nomount ORACLE instance started. Total System Global Area 3290345472 bytes Fixed Size 2217832 bytes Variable Size 1795164312 bytes Database Buffers 1476395008 bytes Redo Buffers 16568320 bytes
5、配置监听服务
Primary端监听（应该已经存在，大多数情况下不用重新配置）
# listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /usr/oracle/app
StandBy端监听（配置了静态监听 服务名GLOBAL_DBNAME = StandBy）
# listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = StandBy)
(ORACLE_HOME =/usr/oracle/app/product/11.2.0/dbhome_1)
(SID_NAME = orcl_standby)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /usr/oracle/app
启动standby端监听
[[email protected] admin]$ lsnrctl start LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:15 Copyright (c) 1991, 2009, Oracle. All rights reserved. Starting /usr/oracle/app/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.1.0 - Production System parameter file is /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /usr/oracle/app/diag/tnslsnr/oracledb/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.22.17)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 23-DEC-2015 15:48:16 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /usr/oracle/app/diag/tnslsnr/oracledb/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.22.17)(PORT=1521))) Services Summary... Service "StandBy" has 1 instance(s). Instance "orcl", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully
6、配置网络服务名，并测试互通性
Primary端和StandBy端都要进行如下配置：
tns_primary =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
tns_standby =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME =StandBy )
)
)
***********************************************************************************************
SERVICE_NAME 的值参考lsnrctl的输出，确保用sqlplus工具或者navicact工具能够连接SERVICE_NAME
因为fal_server 会使用服务名，如果配置不正确，这归档日志无法正常发送
***********************************************************************************************
在primary端和standby端都进行测试（为了角色切换）
[[email protected] admin]$ tnsping tns_primary TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:44 Copyright (c) 1997, 2009, Oracle. All rights reserved. Used parameter files: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/sqlnet.ora Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl))) OK (0 msec) [[email protected] admin]$ tnsping tns_standby TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:49 Copyright (c) 1997, 2009, Oracle. All rights reserved. Used parameter files: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/sqlnet.ora Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl))) OK (0 msec)
7、duplicate standby
rman连接两个数据库
[[email protected] admin]$ rman target sys/wangshengzhuang@tns_primary auxiliary sys/wangshengzhuang@tns_standby Recovery Manager: Release 11.2.0.1.0 - Production on Wed Dec 23 16:11:51 2015 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. connected to target database: ORCL (DBID=1426832466) connected to auxiliary database: ORCL (not mounted)
开始复制
RMAN> DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE DORECOVER NOFILENAMECHECK; Starting Duplicate Db at 23-DEC-15 using target database control file instead of recovery catalog allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=20 device type=DISK RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of Duplicate Db command at 12/23/2015 16:13:38 RMAN-05541: no archived logs found in target database
primary端切换下日志，重写执行rman duplicate即可
SYS@orcl>alter system switch logfile;
System altered.
SYS@orcl>quit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[[email protected] admin]$ rman target sys/wangshengzhuang@tns_primary auxiliary sys/wangshengzhuang@tns_standby
Recovery Manager: Release 11.2.0.1.0 - Production on Wed Dec 23 16:14:59 2015
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1426832466)
connected to auxiliary database: ORCL (not mounted)
RMAN> DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE DORECOVER NOFILENAMECHECK;
Starting Duplicate Db at 23-DEC-15
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=18 device type=DISK
contents of Memory Script:
{
backup as copy reuse
targetfile ‘/usr/oracle/app/product/11.2.0/dbhome_1/dbs/orapworcl‘ auxiliary format
‘/usr/oracle/app/product/11.2.0/dbhome_1/dbs/orapworcl‘ ;
}
executing Memory Script
Starting backup at 23-DEC-15
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=39 device type=DISK
Finished backup at 23-DEC-15
contents of Memory Script:
{
backup as copy current controlfile for standby auxiliary format ‘/usr/oracle/app/oradata/orcl/control01.ctl‘;
restore clone controlfile to ‘/usr/oracle/app/flash_recovery_area/orcl/control02.ctl‘ from
‘/usr/oracle/app/oradata/orcl/control01.ctl‘;
}
executing Memory Script
Starting backup at 23-DEC-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
output file name=/usr/oracle/app/product/11.2.0/dbhome_1/dbs/snapcf_orcl.f tag=TAG20151223T161504 RECID=1 STAMP=899223305
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 23-DEC-15
Starting restore at 23-DEC-15
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 23-DEC-15
contents of Memory Script:
{
sql clone ‘alter database mount standby database‘;
}
executing Memory Script
sql statement: alter database mount standby database
contents of Memory Script:
{
set newname for tempfile 1 to
"/usr/oracle/app/oradata/orcl/temp01.dbf";
switch clone tempfile all;
set newname for datafile 1 to
"/usr/oracle/app/oradata/orcl/system01.dbf";
set newname for datafile 2 to
"/usr/oracle/app/oradata/orcl/sysaux01.dbf";
set newname for datafile 3 to
"/usr/oracle/app/oradata/orcl/undotbs01.dbf";
set newname for datafile 4 to
"/usr/oracle/app/oradata/orcl/users01.dbf";
backup as copy reuse
datafile 1 auxiliary format
"/usr/oracle/app/oradata/orcl/system01.dbf" datafile
2 auxiliary format
"/usr/oracle/app/oradata/orcl/sysaux01.dbf" datafile
3 auxiliary format
"/usr/oracle/app/oradata/orcl/undotbs01.dbf" datafile
4 auxiliary format
"/usr/oracle/app/oradata/orcl/users01.dbf" ;
sql ‘alter system archive log current‘;
}
executing Memory Script
executing command: SET NEWNAME
renamed tempfile 1 to /usr/oracle/app/oradata/orcl/temp01.dbf in control file
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting backup at 23-DEC-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=/usr/oracle/app/oradata/orcl/system01.dbf
output file name=/usr/oracle/app/oradata/orcl/system01.dbf tag=TAG20151223T161512
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/usr/oracle/app/oradata/orcl/sysaux01.dbf
output file name=/usr/oracle/app/oradata/orcl/sysaux01.dbf tag=TAG20151223T161512
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/usr/oracle/app/oradata/orcl/undotbs01.dbf
output file name=/usr/oracle/app/oradata/orcl/undotbs01.dbf tag=TAG20151223T161512
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=/usr/oracle/app/oradata/orcl/users01.dbf
output file name=/usr/oracle/app/oradata/orcl/users01.dbf tag=TAG20151223T161512
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 23-DEC-15
sql statement: alter system archive log current
contents of Memory Script:
{
backup as copy reuse
archivelog like "/usr/oracle/app/flash_recovery_area/ORCL/archivelog/2015_12_23/o1_mf_1_8_c7np1mbd_.arc" auxiliary format
"/usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_%u_.arc" ;
catalog clone recovery area;
switch clone datafile all;
}
executing Memory Script
Starting backup at 23-DEC-15
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log copy
input archived log thread=1 sequence=8 RECID=2 STAMP=899223347
output file name=/usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_06qpi3pj_.arc RECID=0 STAMP=0
channel ORA_DISK_1: archived log copy complete, elapsed time: 00:00:01
Finished backup at 23-DEC-15
searching for all files in the recovery area
List of Files Unknown to the Database
=====================================
File Name: /usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_06qpi3pj_.arc
cataloging files...
cataloging done
List of Cataloged Files
=======================
File Name: /usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_06qpi3pj_.arc
datafile 1 switched to datafile copy
input datafile copy RECID=1 STAMP=899223348 file name=/usr/oracle/app/oradata/orcl/system01.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=2 STAMP=899223348 file name=/usr/oracle/app/oradata/orcl/sysaux01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=3 STAMP=899223348 file name=/usr/oracle/app/oradata/orcl/undotbs01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=4 STAMP=899223348 file name=/usr/oracle/app/oradata/orcl/users01.dbf
contents of Memory Script:
{
set until scn 1028421;
recover
standby
clone database
delete archivelog
;
}
executing Memory Script
executing command: SET until clause
Starting recover at 23-DEC-15
using channel ORA_AUX_DISK_1
starting media recovery
archived log for thread 1 with sequence 8 is already on disk as file /usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_06qpi3pj_.arc
archived log file name=/usr/oracle/app/flash_recovery_area/DB_STANDBY/archivelog/2015_12_23/o1_mf_1_8_06qpi3pj_.arc thread=1 sequence=8
media recovery complete, elapsed time: 00:00:00
Finished recover at 23-DEC-15
Finished Duplicate Db at 23-DEC-15
RMAN>
8、启用日志传送
Primary>show parameter LOG_ARCHIVE_DEST_STATE_2 NAME TYPE VALUE ------------------------------------ ---------------------- ------------------------------ log_archive_dest_state_2 string DEFER log_archive_dest_state_20 string enable log_archive_dest_state_21 string enable log_archive_dest_state_22 string enable log_archive_dest_state_23 string enable log_archive_dest_state_24 string enable log_archive_dest_state_25 string enable log_archive_dest_state_26 string enable log_archive_dest_state_27 string enable log_archive_dest_state_28 string enable log_archive_dest_state_29 string enable Primary>alter system set LOG_ARCHIVE_DEST_STATE_2=ENABLE; System altered.
8、验证结果
查询primary数据库角色
Primary>select database_role from v$database; DATABASE_ROLE -------------------------------- PRIMARY
查询standby数据库角色
StandBy>select database_role from v$database; DATABASE_ROLE -------------------------------- PHYSICAL STANDBY StandBy>
primary端插入一条数据
Primary> INSERT INTO "SCOTT"."DEPT" ("DEPTNO", "DNAME", "LOC") VALUES (‘12‘, ‘OPERATIONS‘, ‘OPERATIONS‘);
1 row created.
Primary>commit;
Commit complete.
Primary>alter system switch logfile;
System altered.
standby端：启动redo应用、暂停redo应用 打开数据库，查询数据是否被同步过来了
StandBy>alter database recover managed standby database disconnect from session; Database altered. StandBy>alter database recover managed standby database cancel; Database altered. StandBy>alter database open; Database altered. StandBy>select open_mode from v$database; OPEN_MODE ---------------------------------------- READ ONLY StandBy>
见证奇迹的时刻：
StandBy>select * from scott.dept;
DEPTNO DNAME LOC
---------- ---------------------------- --------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
12 OPERATIONS OPERATIONS
9、启用实时应用redo
添加redo log
首先查询当前redo log的大小、位置
Primary>col group# for 9
Primary>col status for a10
Primary>col type for a10
Primary>col member for a50;
Primary>col is_rec for a10
Primary>select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_REC
------ ---------- ---------- -------------------------------------------------- ------
3 ONLINE /usr/oracle/app/oradata/orcl/redo03.log NO
2 ONLINE /usr/oracle/app/oradata/orcl/redo02.log NO
1 ONLINE /usr/oracle/app/oradata/orcl/redo01.log NO
Primary>select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARCHIV STATUS FIRST_CHANGE# FIRST_TIME NEXT_CHANGE# NEXT_TIME
------ ---------- ---------- ---------- ---------- ---------- ------ ---------- ------------- ------------ ------------ ------------
1 1 10 52428800 512 1 NO CURRENT 1029234 23-DEC-15 2.8147E+14
2 1 8 52428800 512 1 YES INACTIVE 1028340 23-DEC-15 1028421 23-DEC-15
3 1 9 52428800 512 1 YES INACTIVE 1028421 23-DEC-15 1029234 23-DEC-15
当前有三组、每组1个member、大小为50M, 我们增加四组，每组1个member，大小为50M
Primary>ALTER DATABASE ADD STANDBY LOGFILE GROUP 4(‘/usr/oracle/app/oradata/orcl/stbyredolog4a.log‘) SIZE 50 M; Database altered. Primary>ALTER DATABASE ADD STANDBY LOGFILE GROUP 5(‘/usr/oracle/app/oradata/orcl/stbyredolog5a.log‘) SIZE 50 M; Database altered. Primary>ALTER DATABASE ADD STANDBY LOGFILE GROUP 6(‘/usr/oracle/app/oradata/orcl/stbyredolog6a.log‘) SIZE 50 M; Database altered. Primary>ALTER DATABASE ADD STANDBY LOGFILE GROUP 7(‘/usr/oracle/app/oradata/orcl/stbyredolog7a.log‘) SIZE 50 M; Database altered.
查看结果：
Primary>select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_REC
------ ---------- ---------- -------------------------------------------------- ------
3 ONLINE /usr/oracle/app/oradata/orcl/redo03.log NO
2 ONLINE /usr/oracle/app/oradata/orcl/redo02.log NO
1 ONLINE /usr/oracle/app/oradata/orcl/redo01.log NO
4 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog4a.log NO
5 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog5a.log NO
6 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog6a.log NO
7 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog7a.log NO
7 rows selected.
同理在standby端做相同的操作
StandBy>ALTER DATABASE ADD STANDBY LOGFILE GROUP 4(‘/usr/oracle/app/oradata/orcl/stbyredolog4a.log‘) SIZE 50 M; Database altered. StandBy>ALTER DATABASE ADD STANDBY LOGFILE GROUP 5(‘/usr/oracle/app/oradata/orcl/stbyredolog5a.log‘) SIZE 50 M; Database altered. StandBy>ALTER DATABASE ADD STANDBY LOGFILE GROUP 6(‘/usr/oracle/app/oradata/orcl/stbyredolog6a.log‘) SIZE 50 M; Database altered. StandBy>ALTER DATABASE ADD STANDBY LOGFILE GROUP 7(‘/usr/oracle/app/oradata/orcl/stbyredolog7a.log‘) SIZE 50 M; Database altered.
StandBy>select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_REC
------ ---------- ---------- ---------------------------------------------------------------------------------------------------- ------
3 ONLINE /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_3_c7np1p97_.log YES
2 ONLINE /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_2_c7np1osm_.log YES
1 ONLINE /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_1_c7np1od8_.log YES
4 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog4a.log NO
5 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog5a.log NO
6 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog6a.log NO
7 STANDBY /usr/oracle/app/oradata/orcl/stbyredolog7a.log NO
更改primary和standby端的log_archive_dest_2、
Primary>show parameter log_archive_dest_2
NAME TYPE VALUE
------------------------------------ ---------- ------------------------------
log_archive_dest_2 string SERVICE=tns_standby ARCH VALID
_FOR=(ONLINE_LOGFILES,PRIMARY_
ROLE) DB_UNIQUE_NAME=db_standb
y
log_archive_dest_20 string
log_archive_dest_21 string
log_archive_dest_22 string
log_archive_dest_23 string
log_archive_dest_24 string
log_archive_dest_25 string
log_archive_dest_26 string
log_archive_dest_27 string
log_archive_dest_28 string
log_archive_dest_29 string
Primary>alter system set log_archive_dest_2=‘SERVICE=tns_standby LGWR VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_standby‘;
System altered.
Primary>show parameter log_archive_dest_2
NAME TYPE VALUE
------------------------------------ ---------- ------------------------------
log_archive_dest_2 string SERVICE=tns_standby LGWR VALID
_FOR=(ONLINE_LOGFILES,PRIMARY_
ROLE) DB_UNIQUE_NAME=db_standb
y
log_archive_dest_20 string
log_archive_dest_21 string
log_archive_dest_22 string
log_archive_dest_23 string
log_archive_dest_24 string
log_archive_dest_25 string
log_archive_dest_26 string
log_archive_dest_27 string
log_archive_dest_28 string
log_archive_dest_29 string
Primary>
更改Primary端的log_archive_dest_2
alter system set log_archive_dest_2=‘SERVICE=tns_standby ARCH VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_standby‘;
更改standby端的log_archive_dest_2
SQL> alter system set log_archive_dest_2=‘SERVICE=tns_primary LGWR VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orcl‘; System altered.
启用实时StandBy端redo应用
StandBy>alter database recover managed standby database using current logfile disconnect from session;
验证：
首先在Primay端插入一条数据：
Primary>select * from scott.dept;
DEPTNO DNAME LOC
---------- ---------------------------- --------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
12 OPERATIONS OPERATIONS
Primary>INSERT INTO "SCOTT"."DEPT" ("DEPTNO", "DNAME", "LOC") VALUES (‘13‘, ‘OPERATIONS‘, ‘OPERATIONS‘);
1 row created.
Primary>commit;
Commit complete.
standby端查看
StandBy>select * from scott.dept;
DEPTNO DNAME LOC
---------- ---------------------------- --------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
12 OPERATIONS OPERATIONS
13 OPERATIONS OPERATIONS
6 rows selected.
10、switchover
备库暂停 redo应用
StandBy>alter database recover managed standby database cancel; Database altered.
查询主库是否支持switchover操作
Primary> select switchover_status from v$database; SWITCHOVER_STATUS ---------------------------------------- TO STANDBY
查询备库是否支持switchover操作
StandBy> select switchover_status from v$database; SWITCHOVER_STATUS ---------------------------------------- NOT ALLOWED
not allowed是因为主库还未变切换为standby
switchover，primary切换为物理standby，切换后查看数据库角色、打开模式、
Primary>alter database commit to switchover to physical standby; Database altered. Primary>shutdown immediate; ORA-01507: database not mounted ORACLE instance shut down. Primary>startup ORACLE instance started. Total System Global Area 3290345472 bytes Fixed Size 2217832 bytes Variable Size 1795164312 bytes Database Buffers 1476395008 bytes Redo Buffers 16568320 bytes Database mounted. Database opened. Primary>select open_mode from v$database; OPEN_MODE ---------------------------------------- READ ONLY Primary>select database_role from v$database; DATABASE_ROLE -------------------------------- PHYSICAL STANDBY Primary>
物理standby切换为primary
SQL> select switchover_status from v$database; SWITCHOVER_STATUS ---------------------------------------- SWITCHOVER PENDING
如果是SWITCHOVER PENDING，说明当前standby数据库没有启动redo应用，重新执行下面的命令即可
alter database recover managed standby database using current logfile disconnect from session;
如果是session active 说明当前有用户连接到StandBy数据库，建议先断开这些连接，或者先关闭数据库，启动到mount状态（出现上面那个状态是你用sqlplus连接着主库，启动到mount状态就正常啦 ）
SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started. Total System Global Area 3290345472 bytes Fixed Size 2217832 bytes Variable Size 1795164312 bytes Database Buffers 1476395008 bytes Redo Buffers 16568320 bytes Database mounted. SQL> select switchover_status from v$database; SWITCHOVER_STATUS ---------------------------------------- TO PRIMARY
切换
StandBy>select switchover_status from v$database; SWITCHOVER_STATUS ---------------------------------------- TO PRIMARY StandBy> alter database commit to switchover to primary; Database altered. StandBy>alter database open; Database altered. StandBy>select open_mode from v$database; OPEN_MODE ---------------------------------------- READ WRITE StandBy>select database_role from v$database; DATABASE_ROLE -------------------------------- PRIMARY StandBy>
测试同上（插入删除），这里只进行简单测试
现在的Primay切换日志
SQL> select max(sequence#) from v$archived_log;
MAX(SEQUENCE#)
--------------
14
SQL> alter system switch logfile;
System altered.
在现在的standby查询
SYS@orcl>select max(sequence#) from v$archived_log;
MAX(SEQUENCE#)
--------------
15
常用查询
1、查询进程的活动状态
select process,client_process,sequence#,status from v$managed_standby;
2、查询redo应用进度
select dest_name,archived_thread#,archived_seq#,applied_thread#,applied_seq#,db_unique_name from v$archive_dest_status where status =‘VALID‘;
3、查询归档文件路径及创建信息
select name,creator,sequence#,applied,completion_time from v$archived_log;
4、查询归档历史
select first_time,first_change#,next_change#,sequence# from v$log_history; select thread#,sequence#,applied from v$archived_log;
5、参看数据库的基本信息
select database_role,db_unique_name,open_mode,protection_mode,protection_level,switchover_status from v$database;
6、查询redo应用及redo传输服务的活动状态
select database_role,db_unique_name,open_mode,protection_mode,protection_level,switchover_status from v$database;
7、检查应用模式
StandBy>select recovery_mode from v$archive_dest_status where dest_id=2; RECOVERY_MODE ---------------------------------------------- IDLE
取值
idle
managed：
managed real_time_apply：
时间： 2024-10-19 03:13:14