一、数据库及操作系统初始环境：
准备已经安装完毕可以正常运行的RAC数据库，以及一台安装完ORACLE软件未创建数据库的。
RAC和单实例安装可以参考链接：
其中RAC做为DG的主库。
1.我的规划配置如下：
RAC 节点1：-IP192.168.1.221 主机名 bysrac1.bys.com ，以及数据库名 bysrac，Database unique name: bysrac
备库 IP 192.168.1.211 主机名racdg.bys.com，实例名 racdg，数据库名 bysrac，Database unique name: racdg
如下：
[grid@bysrac1 ~]$ cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6localhost6
192.168.1.221 bysrac1 bysrac1.bys.com
192.168.1.226 bysrac1-vip
192.168.1.222 bysrac2 bysrac2.bys.com
192.168.1.227 bysrac2-vip
192.168.10.1 bysrac1-priv
192.168.10.2 bysrac2-priv
192.168.1.228 bysrac-cluster bysrac-cluster-scan
192.168.1.211 racdg racdg.bys.com
[grid@bysrac1 ~]$ srvctl config database -d bysrac -a
Database unique name: bysrac
Database name: bysrac
Oracle home: /u01/app/oracle/product/11.2.0/dbhome_1
Oracle user: oracle
Spfile: +BYSASMDATA/bysrac/spfilebysrac.ora
Domain:
Start options: open
Stop options: immediate
Database role: PRIMARY
Management policy: AUTOMATIC
Server pools: bysrac
Database instances: bysrac1,bysrac2
Disk Groups: BYSASMDATA,BYSASMDG
备库： /etc/hosts与主库完全相同即可。
[oracle@racdg ~]$ cat .bash_profile
ORACLE_BASE=/u01
ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
ORACLE_SID=racdg
PATH=$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:$PATH:$HOME/bin
export PATH ORACLE_BASE ORACLE_HOME ORACLE_SID
alias sqlplus='rlwrap sqlplus'
alias rman='rlwrap rman'
2.RAC数据库中各文件位置--恢复到备库时转化文件名字用
SYS@bysrac1>archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination +BYSASMDATA
Oldest online log sequence 156
Next log sequence to archive 157
Current log sequence 157
SYS@bysrac1>show parameter recovery
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string +BYSASMDG
db_recovery_file_dest_size big integer 4977M
recovery_parallelism integer 0
SYS@bysrac1>select db_unique_name,name from v$database;
DB_UNIQUE_NAME NAME
------------------------------ ---------
bysrac BYSRAC
SYS@bysrac1>select name from v$datafile;
NAME
----------------------------------------------------------------------------------------------------
+BYSASMDATA/bysrac/datafile/system.259.818615175
+BYSASMDATA/bysrac/datafile/sysaux.260.818615237
+BYSASMDATA/bysrac/datafile/undotbs1.261.818615291
+BYSASMDATA/bysrac/datafile/undotbs2.263.818615365
+BYSASMDATA/bysrac/datafile/users.264.818615419
+BYSASMDATA/bysrac/datafile/test1_undo.dbf
+BYSASMDATA/bysrac/datafile/test1.dbf
BYS@bysrac1>selectname,block_size*file_size_blks/1024/1024 as bytes_m from v$controlfile;
NAME BYTES_M
-------------------------------------------------- ----------
+BYSASMDATA/bysrac/controlfile/current.256.8186151 17.6875
19
+BYSASMDG/bysrac/controlfile/current.256.818615127 17.6875
BYS@bysrac1>select group#,member from v$logfile;
GROUP# MEMBER
---------- --------------------------------------------------
1+BYSASMDATA/bysrac/onlinelog/group_1.257.818615137
1+BYSASMDG/bysrac/onlinelog/group_1.257.818615145
2+BYSASMDATA/bysrac/onlinelog/group_2.258.818615153
2+BYSASMDG/bysrac/onlinelog/group_2.258.818615163
3+BYSASMDATA/bysrac/onlinelog/group_3.265.818619941
3+BYSASMDG/bysrac/onlinelog/group_3.259.818619949
4+BYSASMDATA/bysrac/onlinelog/group_4.266.818619961
4+BYSASMDG/bysrac/onlinelog/group_4.260.818619967
二、修改RAC中初始化参数
3.在RAC主库中修改初始化参数
SQL> alter system set standby_file_management=auto scope=spfile;
SQL> alter system set log_archive_config="DG_CONFIG=(bysrac,racdg)"scope=spfile;
SQL> alter system set log_archive_dest_2="SERVICE=racdg LGWRSYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)DB_UNIQUE_NAME=racdg" scope=spfile;
SQL> alter system set fal_server=racdg scope=spfile;
SQL> alter system set fal_client=bysrac;
SQL> alter system setdb_file_name_convert="+BYSASMDATA/bysrac/datafile/","/u01/oradata/racdg",'+BYSASMDATA/bysrac/tempfile/','/u01/oradata/racdg/' scope=spfile;
SQL> alter system set log_file_name_convert="+BYSASMDATA/bysrac/onlinelog/","/u01/oradata/racdg"，'+BYSASMDG/bysrac/onlinelog/','/u01/oradata/racdg/' scope=spfile;
SQL>create pfile='/home/oracle/initaa.ora' from spfile; ------这里创建的PFILE第五步时候发送到备库racdg。
三、配置双方监听互相通过服务名访问
4.双方监听配置文件示例如下：
RAC的listener.ora 就使用RAC安装好后的不用修改。
[oracle@bysrac1 admin]$ cat tnsnames.ora
BYSRAC =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = bysrac-cluster-scan)(PORT =1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = bysrac)
)
)
racdg =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = racdg)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = racdg)
)
)
racdg的tnsnames.ora同上：
[oracle@racdg admin]$ cat listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST =racdg.bys.com)(PORT = 1521))
)
)
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = racdg)
(ORACLE_HOME =/u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = racdg)
)
)
ADR_BASE_LISTENER = /u01
5.发密码及初化参数文件到racdg，并修改初始化参数文件
[oracle@bysrac1 dbs]$ ls
hc_bysrac1.dat initbysrac1.ora orapwbysrac1 peshm_DBUA0_0
hc_DBUA0.dat init.ora peshm_bysrac_1 snapcf_bysrac1.f
[oracle@bysrac1 dbs]$ scp orapwbysrac1 racdg:$ORACLE_HOME/dbs/
oracle@racdg's password:
orapwbysrac1 100% 1536 1.5KB/s 00:00
[oracle@bysrac1 dbs]$ cd
[oracle@bysrac1 ~]$ ls
alert_bysrac1.log initaa.ora inittest.ora oradiag_oracle
Desktop initaa.orabak inittest.orabak
[oracle@bysrac1 ~]$ scp inittest.ora racdg:$ORACLE_HOME/dbs
oracle@racdg's password:
inittest.ora 100% 1024 1.0KB/s 00:00
6.在racdg上修改密码及参数文件名，并修改初始化参数
[oracle@racdg dbs]$ ls
inittest.ora orapwbysrac1
[oracle@racdg dbs]$ mv orapwbysrac1 orapwracdg
[oracle@racdg dbs]$ mv inittest.ora initracdg.ora
[oracle@racdg dbs]$ ls
initracdg.ora orapwracdg
修改备库初始化参数文件，最终是这样：
注意点有：
db_file_name_convert时，因为使用ASM,DATAFILE 和TEMPFILE的都要写上。
log_file_name_convert时，因为使用了在不同磁盘组的多镜像，也需要都写上。
audit_file_dest指定的目录要手动去创建。
control_files尽量写一个，少出错。可以在STANDBY备库创建好后再增加镜像。
.log_archive_dest_1指定的目录要创建一下。.log_archive_dest_2是为了SWITCHOVER 或FAILOVER时备库切换为主库用的。
db_unique_name需要手动添加上。
[oracle@racdg dbs]$ cat initracdg.ora
*.audit_file_dest='/u01/admin/bysrac/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='/u01/oradata/racdg/control01.ctl'
*.db_block_size=8192
*.db_create_file_dest='/u01/oradata/racdg/'
*.db_domain=''
*.db_file_name_convert='+BYSASMDATA/bysrac/datafile/','/u01/oradata/racdg/','+BYSASMDATA/bysrac/tempfile/','/u01/oradata/racdg/'
*.db_name='bysrac'
*.db_recovery_file_dest='/u01/flash_recovery_area/'
*.db_recovery_file_dest_size=5218762752
*.diagnostic_dest='/u01'
*.fal_server='RACDG'
*.log_archive_config='DG_CONFIG=(bysrac,racdg)'
*.log_archive_dest_1='LOCATION=/u01/archracdg/'
*.log_archive_dest_2='SERVICE=bysrac1 LGWRSYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=bysrac'
*.log_archive_format='arch_%r_%t_%s.arc'
*.log_file_name_convert='+BYSASMDATA/bysrac/onlinelog/','/u01/oradata/racdg/','+BYSASMDG/bysrac/onlinelog/','/u01/oradata/racdg/'
*.memory_target=741343232
*.open_cursors=300
*.processes=150
*.remote_listener='bysrac-cluster-scan:1521'
*.remote_login_passwordfile='exclusive'
*.standby_file_management='AUTO'
*.undo_tablespace='undotbs1'
*.db_unique_name='racdg'
7.双方互测监听是否正常
racdg 登陆bysrac1
[oracle@racdg admin]$ sqlplus sys/oraclesys@bysrac as sysdba
SYS@bys1>
bysrac1 登陆racdg
[oracle@bysrac1 admin]$ sqlplus sys/oraclesys@racdg as sysdba
Connected to an idle instance. ---备库实例未启动。
SYS@bysrac1>
四、复制数据库到备库
8.在主库上为备库创建一个standby controlfile
SYS@bysrac1>alter system archive log current;
SYS@bysrac1>alter database create standby controlfile as'/home/oracle/control01.ctl';
发送到备库的相同位置，后面恢复数据库到备库时要用。
[oracle@bysrac1 ~]$ scp control01.ctlracdg:/home/oracle/control01.ctl
oracle@racdg's password:
control01.ctl 100% 18MB 17.7MB/s 00:01
此时可以在虚拟机关机做快照
9.在主库做备份并把备份集发送到备库
[oracle@bysrac1 ~]$ rman target /
RMAN> backup database format '/home/oracle/racfull_%s_%p';
[oracle@bysrac1 ~]$ du -sh racfull_*
766M racfull_5_1
18M racfull_6_1
[oracle@bysrac1 ~]$ scp racfull_5_1 racfull_6_1 racdg:/home/oracle/
oracle@racdg's password:
racfull_5_1 100% 765MB 5.8MB/s 02:11
racfull_6_1 100% 18MB 4.5MB/s 00:04
10.在备库用RMAN做复制STANDBY数据库操作：有日志
这里要注意的有要用用户名和密码连接主库和备库。
还有如果使用虚拟机的话，性能也很重要，我在这里就卡死机了一次。
[oracle@racdg ~]$ rman target sys/oraclesys@bysrac auxiliary sys/oraclesys
Recovery Manager: Release 11.2.0.1.0 - Production on Mon Aug 12 22:13:22 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rightsreserved.
connected to target database: BYSRAC (DBID=2573560818)
connected to auxiliary database: BYSRAC (not mounted)
RMAN> duplicate target database for standby;
Starting Duplicate Db at 12-AUG-13
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=19 device type=DISK
contents of Memory Script:
{
restore clone standby controlfile;
}
executing Memory Script
Starting restore at 12-AUG-13
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: copied control file copy
input file name=/home/oracle/control01.ctl
output file name=/u01/oradata/racdg/control01.ctl
Finished restore at 12-AUG-13
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
"/u01/oradata/racdg/temp.262.818615321";
switch clone tempfile all;
set newname for datafile 1 to
"/u01/oradata/racdg/system.259.818615175";
set newname for datafile 2 to
"/u01/oradata/racdg/sysaux.260.818615237";
set newname for datafile 3 to
"/u01/oradata/racdg/undotbs1.261.818615291";
set newname for datafile 4 to
"/u01/oradata/racdg/undotbs2.263.818615365";
set newname for datafile 5 to
"/u01/oradata/racdg/users.264.818615419";
restore
clone database
;
}
executing Memory Script
executing command: SET NEWNAME
renamed tempfile 1 to /u01/oradata/racdg/temp.262.818615321 in control file
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 12-AUG-13
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_AUX_DISK_1: restoring datafile 00001 to/u01/oradata/racdg/system.259.818615175
channel ORA_AUX_DISK_1: restoring datafile 00002 to/u01/oradata/racdg/sysaux.260.818615237
channel ORA_AUX_DISK_1: restoring datafile 00003 to/u01/oradata/racdg/undotbs1.261.818615291
channel ORA_AUX_DISK_1: restoring datafile 00004 to/u01/oradata/racdg/undotbs2.263.818615365
channel ORA_AUX_DISK_1: restoring datafile 00005 to /u01/oradata/racdg/users.264.818615419
channel ORA_AUX_DISK_1: reading from backup piece /home/oracle/racfull_5_1
channel ORA_AUX_DISK_1: piece handle=/home/oracle/racfull_5_1tag=TAG20130812T200604
channel ORA_AUX_DISK_1: restored backup piece 1
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:04:15
Finished restore at 12-AUG-13
contents of Memory Script:
{
switch clone datafile all;
}
executing Memory Script
datafile 1 switched to datafile copy
input datafile copy RECID=2 STAMP=823299518 file name=/u01/oradata/racdg/system.259.818615175
datafile 2 switched to datafile copy
input datafile copy RECID=3 STAMP=823299518 filename=/u01/oradata/racdg/sysaux.260.818615237
datafile 3 switched to datafile copy
input datafile copy RECID=4 STAMP=823299518 file name=/u01/oradata/racdg/undotbs1.261.818615291
datafile 4 switched to datafile copy
input datafile copy RECID=5 STAMP=823299518 filename=/u01/oradata/racdg/undotbs2.263.818615365
datafile 5 switched to datafile copy
input datafile copy RECID=6 STAMP=823299518 file name=/u01/oradata/racdg/users.264.818615419
Finished Duplicate Db at 12-AUG-13
五、打开DG，检测是否可用
11.打开备库，此时DG处于最大性能模式
可以通过select protection_mode,database_role,open_mode from v$database;在主备库上进行验证当前DG模式
同时可以在备库上alter database recover managed standby database disconnect fromsession;此时DG可以正常运行。
这里就不演示查询结果了，因为我在下面一步要配置DG为最大可用模式。
12.配置为最大可用模式
在备库要创建STANDBY REDO LOGFILE。所要创建在的目录当然要先存在了。
使用的语句如下：
alter database add standby logfile group 5'/u01/oradata/racdg/standbyredo/standbyredo05.log' size 50M;
alter database add standby logfile group 6'/u01/oradata/racdg/standbyredo/standbyredo06.log' size 50M;
alter database add standby logfile group 7'/u01/oradata/racdg/standbyredo/standbyredo07.log' size 50M;
alter database add standby logfile group 8'/u01/oradata/racdg/standbyredo/standbyredo08.log' size 50M;
alter database add standby logfile group 9'/u01/oradata/racdg/standbyredo/standbyredo09.log' size 50M;
BYS@racdg>select member from v$logfile;
MEMBER
----------------------------------------------------------------------------------------------------
/u01/oradata/racdg/group_1.257.818615137
/u01/oradata/racdg/group_1.257.818615145
/u01/oradata/racdg/group_2.258.818615153
/u01/oradata/racdg/group_2.258.818615163
/u01/oradata/racdg/group_3.265.818619941
/u01/oradata/racdg/group_3.259.818619949
/u01/oradata/racdg/group_4.266.818619961
/u01/oradata/racdg/group_4.260.818619967
/u01/oradata/racdg/standbyredo/standbyredo05.log
/u01/oradata/racdg/standbyredo/standbyredo06.log
/u01/oradata/racdg/standbyredo/standbyredo07.log
/u01/oradata/racdg/standbyredo/standbyredo08.log
/u01/oradata/racdg/standbyredo/standbyredo09.log
在主库验证DG工作模式并修改保护模式为最大可用
22:44:28 SYS@bysrac1>selectprotection_mode,database_role,open_mode from v$database;
PROTECTION_MODE DATABASE_ROLE OPEN_MODE
-------------------- ---------------- --------------------
MAXIMUM PERFORMANCE PRIMARY READ WRITE
22:47:13 SYS@bysrac1>show parameter log_archive_dest_2
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_2 string SERVICE=racdgLGWR SYNC VALID
_FOR=(ONLINE_LOGFILES,PRIMARY_
ROLE) DB_UNIQUE_NAME=racdg
22:48:52 SYS@bysrac1>shutdown immediate;
22:50:00 SYS@bysrac1>startup mount;
ORACLE instance started.
Total System Global Area 740724736 bytes
Fixed Size 1339092 bytes
Variable Size 549454124bytes
Database Buffers 184549376 bytes
Redo Buffers 5382144 bytes
Database mounted.
22:52:31 SYS@bysrac1>alter database set standbydatabase to maximize availability;
Database altered.
22:53:48 SYS@bysrac1>alter database open;
Database altered.
22:55:56 SYS@bysrac1>select protection_mode,database_role,open_mode fromv$database;
PROTECTION_MODE DATABASE_ROLE OPEN_MODE
-------------------- ---------------- --------------------
MAXIMUM AVAILABILITY PRIMARY READ WRITE
###############################
备库上的操作：
22:58:17 SYS@racdg>shutdown immediate;
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
22:59:18 SYS@racdg>startup mount;
ORACLE instance started.
Total System Global Area 740724736 bytes
Fixed Size 1339092 bytes
Variable Size 436207916bytes
Database Buffers 297795584 bytes
Redo Buffers 5382144 bytes
Database mounted.
22:59:45 SYS@racdg>selectprotection_mode,database_role,open_mode from v$database;
PROTECTION_MODE DATABASE_ROLE OPEN_MODE
-------------------- ---------------- --------------------
MAXIMUM AVAILABILITY PHYSICAL STANDBY MOUNTED
这里我要使用了11G新特性ACTIVE STANDBY
SYS@racdg>alter database open;
Database altered.
SYS@racdg>set time on
23:01:06 SYS@racdg>select protection_mode,database_role,open_mode fromv$database;
PROTECTION_MODE DATABASE_ROLE OPEN_MODE
-------------------- ---------------- --------------------
MAXIMUM AVAILABILITY PHYSICAL STANDBY READ ONLY
使用 using current logfile参数启动实时恢复
23:01:08 SYS@racdg> alter database recover managedstandby database using current logfile disconnect from session;
Database altered.
23:02:05 SYS@racdg>select protection_mode,database_role,open_mode fromv$database;
PROTECTION_MODE DATABASE_ROLE OPEN_MODE
-------------------- ---------------- --------------------
MAXIMUM AVAILABILITY PHYSICAL STANDBY READ ONLY WITH APPLY
13.测试DG双方能否同步
切换日志，并做DML操作
SYS@racdg>selectsequence#,status,thread#,block# from v$managed_standby;
SEQUENCE# STATUS THREAD# BLOCK#
---------- ------------ ---------- ----------
168 CLOSING 1 1
166 CLOSING 1 1
0 CONNECTED 0 0
169 CLOSING 1 1
170 APPLYING_LOG 1 10
0 IDLE 0 0
0 IDLE 0 0
0 IDLE 0 0
170 IDLE 1 10
BYS@bysrac1>set time on
23:03:45 BYS@bysrac1>alter system switch logfile;
System altered.
23:03:53 BYS@bysrac1>select sequence#,status,thread#,block# fromv$managed_standby;
SEQUENCE# STATUS THREAD# BLOCK#
---------- ------------ ---------- ----------
166 CLOSING 1 1673
164 CLOSING 1 1
169 CLOSING 1 1
168 CLOSING 1 1
170 WRITING 1 26
在主库中创建一个新表
23:06:49 BYS@bysrac1>create table test(a varchar2(10));
Table created.
23:07:12 BYS@bysrac1>select * from test;
no rows selected
在备库中立刻就可以查到这个新表已经存在。
23:08:01 SYS@racdg>conn bys/bys
Connected.
23:08:24 BYS@racdg>select * from test;
no rows selected