Oracle 11g DataGuard搭建（一） - 单节点到单节点

（一）DataGuard概要

DataGuard中文称为”数据卫士“，提供了数据库高可用性、数据保护和灾难恢复的功能。DataGuard通过建立primary数据库和standby数据库来确立参照关系，DataGuard将主库（primary）的redo日志传递给备库（standby），然后在备库中应用redo进行同步。

备库又分为2种类型：物理备库和逻辑备库

  • 物理standby是通过块拷贝方式同步，通过接受并应用primary数据库的redo log，以介质恢复的方式同步。在物理备库中，数据是完全相同的，包括schema、表、索引都是一样的。
  • 逻辑standby是通过应用SQL语句进行同步，通过接收primary数据库的redo log并转换成sql语句。

物理备库在实际生产中使用较多，这里记录物理备库的搭建过程。

（二）DataGuard环境规划

  主库 备库
操作系统 redhat 6.7 x86-64(64位) redhat 6.7 x86-64(64位)
服务器名称 primarynode standbynode
IP地址规划 192.168.10.51 192.168.10.52
--------------- ----------------------- ----------------
数据库版本 11.2.0.4 11.2.0.4
db_name adgdb adgdb
db_unique_name adgdb adgdbstandby
instance_name adgdb adgdbstandby
service_name adgdb adgdb
数据库安装 安装数据库软件+创建监听+安装数据库 安装数据库软件+创建监听

常规配置：

( 1 )主库和备库hosts文件配置

[[email protected] ~]# vim /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4
::1         localhost localhost.localdomain localhost6
192.168.10.51  primarynode
192.168.10.52  standbynode

（2）主库oracle用户环境配置

[[email protected] ~]$ more .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
    . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

ORACLE_SID=adgdb; export ORACLE_SID
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1; export ORACLE_HOME
PATH=$ORACLE_HOME/bin:$PATH:$HOME/bin; export PATH
export TEMP=/tmp
export TMPDIR=/tmp
umask 022

export PATH

（3）备库环境变量配置

[[email protected] ~]$ more .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
    . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

ORACLE_SID=adgdbstandby; export ORACLE_SID
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/db_1; export ORACLE_HOME
PATH=$ORACLE_HOME/bin:$PATH:$HOME/bin; export PATH
export TEMP=/tmp
export TMPDIR=/tmp
umask 022

export PATH

(三)DataGuard主库配置

( 1 )主库启用强制记录日志功能

查询是否启用强制记录日志

select force_logging from v$database;

如果未启用，则使用下面语句来开启强制记录日志

alter database force logging;  --强制记录日志

( 2 )启用归档

查询是否启用归档

archive log list
--或者
select log_mode from v$database;

如果未启用归档，可以按照如下步骤开启归档

----Oracle 11g数据库归档模式开启

--STEP1：以sysdba角色登陆数据库
sqlplus / as sysdba

--STEP2：干净的关闭数据库
shutdown immediate

--STEP3：将数据库启动到mount状态
startup mount

--STEP4：开启归档
alter database archivelog;

--STEP5：打开数据库
alter database open

( 3 )主库参数配置
(3.1)db_unique_name



SQL> alter system set db_unique_name = ‘adgdb‘ scope=spfile;


(3.2)log_archive_config


SQL> alter system set log_archive_config=‘DG_CONFIG=(adgdb,adgdbstandby)‘ scope=spfile;


(3.3)log_archive_dest_1


SQL> alter system set log_archive_dest_1=‘LOCATION=/u01/app/oracle/product/11.2.0/db_1/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=adgdb‘ scope=both;


(3.4)log_archive_dest_2


SQL> alter system set log_archive_dest_2=‘SERVICE=tnsadgdbstandby LGWR SYNC AFFIRM VAILD_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=adgdbstandby‘ scope=both;


(3.5)log_archive_dest_state_1


alter system set log_archive_dest_state_1 = ENABLE;


(3.6)log_archive_dest_state_2


alter system set log_archive_dest_state_2 = ENABLE;


(3.7)db_file_name_convert
查看数据文件的位置：


SQL> select name from v$datafile;
NAME
--------------------------------------------------
/u01/app/oracle/oradata/adgdb/system01.dbf
/u01/app/oracle/oradata/adgdb/sysaux01.dbf
/u01/app/oracle/oradata/adgdb/undotbs01.dbf
/u01/app/oracle/oradata/adgdb/users01.dbf
/u01/app/oracle/oradata/adgdb/example01.dbf


如果主库与备库数据文件位置不相同，则需要使用db_file_name_convert来转换。


SQL> alter system set db_file_name_convert=‘/u01/app/oracle/oradata/adgdbstandby‘,‘/u01/app/oracle/oradata/adgdb‘ scope=spfile;


(3.8)log_file_name_convert


查看在线日志文件的位置：


SQL> select member from v$logfile;
MEMBER
--------------------------------------------------
/u01/app/oracle/oradata/adgdb/redo03.log
/u01/app/oracle/oradata/adgdb/redo02.log
/u01/app/oracle/oradata/adgdb/redo01.log


如果主库与备库在线日志文件位置不相同，则需要使用log_file_name_convert来转换。


SQL> alter system set log_file_name_convert=‘/u01/app/oracle/oradata/adgdbstandby‘,‘/u01/app/oracle/oradata/adgdb‘ scope=spfile;


(3.9)standby_file_management


SQL> alter system set standby_file_mamagement=auto;


(3.10)fal_client


SQL> alter system set fal_client=‘tnsadgdb‘ scope=both;


(3.11)fal_server


SQL> alter system set fal_server=‘tnsadgdbstandby‘ scope=both;


( 4 )主库静态监听配置


[[email protected] admin]$ vim listener.ora


# listener.ora Network Configuration File: /u01/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = primarynode)(PORT = 1521))
      )
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME=adgdb)
      (SID_NAME = adgdb)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
    )
  ) 

ADR_BASE_LISTENER = /u01/oracle


查看监听：
[[email protected] admin]$ lsnrctl status


LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 06-APR-2019 13:48:15

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=primarynode)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                06-APR-2019 13:42:48
Uptime                    0 days 0 hr. 5 min. 27 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/11.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=primarynode)(PORT=1521)))
Services Summary...
Service "adgdb" has 2 instance(s).
  Instance "adgdb", status UNKNOWN, has 1 handler(s) for this service...
  Instance "adgdb", status READY, has 1 handler(s) for this service...
Service "adgdbXDB" has 1 instance(s).
  Instance "adgdb", status READY, has 1 handler(s) for this service...
The command completed successfully


( 5 )主库tnsnames.ora文件配置


[[email protected] admin]$ vim tnsnames.ora


tnsadgdb =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.51)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = adgdb)
    )
  )

tnsadgdbstandby =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.52)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = adgdb)
    )
  )


(四)DataGuard备库配置


（ 1 ）密码文件


在dataguard中，主库与备库sys密码需一致。可以将主库的密码文件拷贝到备库中


--登陆到主库，将密码文件复制到备库
[[email protected] ~]$ cd $ORACLE_HOME/dbs
[[email protected] dbs]$ scp orapwadgdb 192.168.10.52:/u01/app/oracle/product/11.2.0/db_1/dbs
[email protected]192.168.10.52‘s password:
orapwadgdb                         100% 1536     1.5KB/s   00:00 

--登陆到备库，修改密码文件的名称
[[email protected] dbs]$ mv orapwadgdb orapwadgdbstandby


或者不拷贝密码文件，直接使用orapwd生成一个新的密码文件，密码需与主库一致：


orapwd file=orapwsbdb password=‘oracle‘;


（ 2 ）初始化参数文件


（2.1）在主库生成初始化参数文件


SQL> create pfile from spfile;
File created.


(2.2)拷贝主库的参数文件到备库并重命名


--在主库上执行复制操作
[[email protected] dbs]$ scp initadgdb.ora 192.168.10.52:/u01/app/oracle/product/11.2.0/db_1/dbs
[email protected]192.168.10.52‘s password:
initadgdb.ora                              100% 1524     1.5KB/s   00:00

--在备库上执行重命名操作
[[email protected] dbs]$ mv initadgdb.ora initadgdbstandby.ora


（2.3）修改备库的参数文件内容


--将初始化参数中的这些参数做修改，其他参数不用动
db_name=‘adgdb‘
db_unique_name=‘adgdbstandby‘
audit_file_dest=‘/u01/app/oracle/admin/adgdbstandby/adump‘
compatible=‘11.2.0.4.0‘
control_files=‘/u01/app/oracle/oradata/adgdbstandby/control01.ctl‘,‘/u01/app/oracle/oradata/adbdbstandby/control02.ctl‘
log_archive_config=‘DG_CONFIG=(adgdb,adgdbstandby)‘
log_archive_dest_1=‘LOCATION=/u01/app/oracle/product/11.2.0/db_1/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=adgdbstandby‘
log_archive_desc_2=‘SERVICE=tnsadgdb LGWR SYNC AFFIRM VALID_FOR(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NMAE=adgdb‘
db_file_name_convert=‘/u01/app/oracle/oradata/adgdb‘,‘/u01/app/oracle/oradata/adgdbstandby‘
log_file_name_convert=‘/u01/app/oracle/oradata/adgdb‘,‘/u01/app/oracle/oradata/adgdbstandby‘
fal_client=‘tnsadgdbstandby‘
fal_server=‘tnsadgdb‘
standby_file_management=‘AUTO‘


注意：里面涉及到路径的需要手动创建


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


（2.4）使用pfile文件创建spfile文件


--登陆到idle数据库
sqlplus / as sysdba

--创建spfile，可在$ORACLE_HOME/dbs下查看
create spfile from pfile

--启动数据库到nomount状态
startup nomount


( 3 )配置静态监听


[[email protected] trace]$ cd /u01/app/oracle/product/11.2.0/db_1/network/admin/
[[email protected] admin]$ touch listener.ora 

[[email protected] admin]$ vim listener.ora
# listener.ora Network Configuration File: /u01/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = standbynode)(PORT = 1521))
      )
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME=adgdb)
      (SID_NAME = adgdbstandby)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
    )
  ) 

ADR_BASE_LISTENER = /u01/oracle


备注：备库为什么一定需要使用静态监听
nomount状态下必须使用静态监听才能连接到实例。


（ 4 ）配置tnsnames.ora文件，直接把主库的拷贝过来即可


[[email protected] trace]$ cd /u01/app/oracle/product/11.2.0/db_1/network/admin/
[[email protected] admin]$ vim tnsnames.ora 

tnsadgdb =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.51)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = adgdb)
    )
  )

tnsadgdbstandby =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.52)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = adgdb)
    )
  )


（ 5 ）测试网络连通性


在主库与备库上均执行，确保可以正常访问：


tnsping tnsadgdb
tnsping tnsadgdbstandby


在主库：


sqlplus sys/[email protected] as sysdba
sqlpus sys/[email protected] as sysdba


（ 6 ）参数检查


由于参数配置的较多，需要认真检查参数配置是否正确，主要检查这些参数


1.db_unique_name             ：2个节点需要不一样
2.compatible                     ：主库与备库兼容性需一致
3.log_archive_config           : 配置主库与备库的db_unique_name
4.log_archive_desc_1,2       ：归档日志的路径
5.log_archive_desc_state_2 :
    enable -- 启用log_archive_desc_2
    defer    --禁用log_archive_desc_2
6.db_file_name_convert       ：数据文件转换路径
7.log_file_name_convert      ：日志文件转换路径
8.standby_file_management ：设置为auto
9.log_archive_format          ：日志文件格式，两边需一致


（ 7 ）使用duplicate创建物理standby


（7.1）连接到主库和备库


## 一定要加nocatalog，否则在执行duplicate时会报错
[[email protected] ~]$ rman target sys/[email protected] auxiliary sys/[email protected] nocatalog


（7.2）使用duplicate复制数据库


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


执行过程见：





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

Starting Duplicate Db at 06-APR-19
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=248 device type=DISK

contents of Memory Script:
{
   backup as copy reuse
   targetfile  ‘/u01/app/oracle/product/11.2.0/db_1/dbs/orapwadgdb‘ auxiliary format
 ‘/u01/app/oracle/product/11.2.0/db_1/dbs/orapwadgdbstandby‘   ;
}
executing Memory Script

Starting backup at 06-APR-19
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=23 device type=DISK
Finished backup at 06-APR-19

contents of Memory Script:
{
ctl‘;
   restore clone controlfile to  ‘/u01/app/oracle/oradata/adgdbstandby/control02.ctl‘ from
 ‘/u01/app/oracle/oradata/adgdbstandby/control01.ctl‘;
}
executing Memory Script

Starting backup at 06-APR-19
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
183
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 06-APR-19

Starting restore at 06-APR-19
using channel ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 06-APR-19

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/app/oracle/oradata/adgdbstandby/temp01.dbf";
   switch clone tempfile all;
   set newname for datafile  1 to
 "/u01/app/oracle/oradata/adgdbstandby/system01.dbf";
   set newname for datafile  2 to
 "/u01/app/oracle/oradata/adgdbstandby/sysaux01.dbf";
   set newname for datafile  3 to
 "/u01/app/oracle/oradata/adgdbstandby/undotbs01.dbf";
   set newname for datafile  4 to
 "/u01/app/oracle/oradata/adgdbstandby/users01.dbf";
   set newname for datafile  5 to
 "/u01/app/oracle/oradata/adgdbstandby/example01.dbf";
   backup as copy reuse
   datafile  1 auxiliary format
 "/u01/app/oracle/oradata/adgdbstandby/system01.dbf"   datafile
 2 auxiliary format
 "/u01/app/oracle/oradata/adgdbstandby/sysaux01.dbf"   datafile
 3 auxiliary format
 "/u01/app/oracle/oradata/adgdbstandby/undotbs01.dbf"   datafile
 4 auxiliary format
 "/u01/app/oracle/oradata/adgdbstandby/users01.dbf"   datafile
 5 auxiliary format
 "/u01/app/oracle/oradata/adgdbstandby/example01.dbf"   ;
   sql ‘alter system archive log current‘;
}
executing Memory Script

executing command: SET NEWNAME

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

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting backup at 06-APR-19
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=/u01/app/oracle/oradata/adgdb/system01.dbf
output file name=/u01/app/oracle/oradata/adgdbstandby/system01.dbf tag=TAG20190406T160954
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/u01/app/oracle/oradata/adgdb/sysaux01.dbf
output file name=/u01/app/oracle/oradata/adgdbstandby/sysaux01.dbf tag=TAG20190406T160954
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:36
channel ORA_DISK_1: starting datafile copy
input datafile file number=00005 name=/u01/app/oracle/oradata/adgdb/example01.dbf
output file name=/u01/app/oracle/oradata/adgdbstandby/example01.dbf tag=TAG20190406T160954
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:25
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/u01/app/oracle/oradata/adgdb/undotbs01.dbf
output file name=/u01/app/oracle/oradata/adgdbstandby/undotbs01.dbf tag=TAG20190406T160954
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=/u01/app/oracle/oradata/adgdb/users01.dbf
output file name=/u01/app/oracle/oradata/adgdbstandby/users01.dbf tag=TAG20190406T160954
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 06-APR-19

sql statement: alter system archive log current

contents of Memory Script:
{
   switch clone datafile all;
}
executing Memory Script

datafile 1 switched to datafile copy
input datafile copy RECID=9 STAMP=1004890308 file name=/u01/app/oracle/oradata/adgdbstandby/system01.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=10 STAMP=1004890308 file name=/u01/app/oracle/oradata/adgdbstandby/sysaux01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=11 STAMP=1004890308 file name=/u01/app/oracle/oradata/adgdbstandby/undotbs01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=12 STAMP=1004890308 file name=/u01/app/oracle/oradata/adgdbstandby/users01.dbf
datafile 5 switched to datafile copy
input datafile copy RECID=13 STAMP=1004890308 file name=/u01/app/oracle/oradata/adgdbstandby/example01.dbf
Finished Duplicate Db at 06-APR-19




（ 8 ）添加主库和备库的standby日志组


（8.1）添加standby日志组需要注意的事项


    

  • standby日志组个数：配置为redo日志组个数+1
    • 

  • 在主库与备库都添加standby日志组。主库可以不添加，但是如果后期发生主备切换，还是要添加，所以最好一次性添加。
    • 

  • 只查询standby日志组： select * from v$standby_log ;
    • 



（8.2）添加主库的standby日志组


alter database add standby logfile group 4 (‘/u01/app/oracle/oradata/adgdb/stredo04.log‘) size 50M;
alter database add standby logfile group 5 (‘/u01/app/oracle/oradata/adgdb/stredo05.log‘) size 50M;
alter database add standby logfile group 6 (‘/u01/app/oracle/oradata/adgdb/stredo06.log‘) size 50M;
alter database add standby logfile group 7 (‘/u01/app/oracle/oradata/adgdb/stredo07.log‘) size 50M;


（8.3）添加备库的standby日志组


alter database add standby logfile group 4 (‘/u01/app/oracle/oradata/adgdbstandby/stredo04.log‘) size 50M;
alter database add standby logfile group 5 (‘/u01/app/oracle/oradata/adgdbstandby/stredo05.log‘) size 50M;
alter database add standby logfile group 6 (‘/u01/app/oracle/oradata/adgdbstandby/stredo06.log‘) size 50M;
alter database add standby logfile group 7 (‘/u01/app/oracle/oradata/adgdbstandby/stredo07.log‘) size 50M;


（ 9 ）开始同步数据库，在备库上执行


alter database open;  

--方式一：开启实时同步
alter database recover managed standby database using current logfile disconnect from session;
--或简写为：
alter database recover managed standby database using current logfile disconnect;

--方式二：开启同步（日志切换时才同步）
alter database recover managed standby database disconnect from session;


至此配置完成。


（五）DataGuard状态查看


（ 1 ）主库状态查看


SQL> select    open_mode,      --数据库打开模式，如果实时同步，则为：read only with apply，取消同步则为：read only
          database_role,       --数据库角色，是主库还是备库
          protection_mode,     --保护模式
          protection_level     --保护级别
from  v$database;  

OPEN_MODE            DATABASE_ROLE    PROTECTION_MODE       PROTECTION_LEVEL
-------------------- ---------------- -------------------- --------------------
READ WRITE           PRIMARY          MAXIMUM PERFORMANCE  MAXIMUM PERFORMANCE


（ 2 ）备库状态查看


SQL> select    open_mode,
          database_role,
          protection_mode,
          protection_level
from  v$database;   

OPEN_MODE            DATABASE_ROLE    PROTECTION_MODE       PROTECTION_LEVEL
-------------------- ---------------- -------------------- --------------------
READ ONLY WITH APPLY PHYSICAL STANDBY MAXIMUM PERFORMANCE  MAXIMUM PERFORMANCE


（六）DataGuard测试


在主库上创建表lijiaman.test01,并插入数据


SQL> create table test01(id  number,name  varchar2(50));
Table created.

SQL> insert into test01 values(1,‘lijiaman‘);
1 row created.

SQL> insert into test01 values(2,‘gegeman‘);
1 row created.

SQL> commit;


在standby数据库上查询lijiaman.test01表，数据一致


SQL> select db_unique_name from v$database;
DB_UNIQUE_NAME
------------------------------
adgdbstandby

SQL> select * from lijiaman.test01;
ID NAME
---------- --------------------
1 lijiaman
2 gegeman


【完】



原文地址：https://www.cnblogs.com/lijiaman/p/10663047.html
				


				
时间： 2024-10-06 00:31:36 

		


		


	

	
	

		


		
Oracle 11g DataGuard搭建（一） - 单节点到单节点的相关文章


								

		

			

                ORACLE 11G DataGuard的一些高级管理案例研究
			

		

		

									

				搭建完了ORACLE 11G dataguard后,也做了角色切换的实验,有switchover已经failover,感觉受益颇多,而后继续研究了下dataguard的一些高级管理功能,所谓冰山一角,ORACLE果然博大精深,总结记录如下:1,ORACLE 11G dataguard的高级管理1.1.READ ONLY/WRITE模式打开物理STANDBY一般standby都是可以设置为mount状态的,于物理standby 可以有效分担primary 数据库压力,提升资源利用,实际上说的就是这			

		

	

				

		

			

                Oracle 10G DataGuard搭建
			

		

		

									

				前面我们有讲到Oracle 11G DataGuard的搭建,10G的搭建也是大同小异.不过Oracle 10G不支持Standby open 环境: 角色 主机名 IP 数据库版本 操作系统版本 Primary fdb1 192.168.10.8 10.2.0.1 CentOS 5.11 x86_64 Standby fdb2 192.168.10.9 10.2.0.1 CentOS 5.11 x86_64 在fdb1的/etc/hosts中加入(fdb1) 127.0.0.1 fdb1 19			

		

	

				

		

			

                Oracle 11g RAC搭建（VMware环境）
			

		

		

									

				Oracle 11g RAC搭建(VMware环境) Oracle 11g RAC搭建VMware环境 安装环境与网络规划 安装环境 网络规划 环境配置 通过SecureCRT建立命令行连接 关闭防火墙 创建必要的用户组和目录并授权 节点配置检查 系统文件设置 配置IP和hostshostname 配置grid和oracle用户环境变量 配置oracle用户ssh互信 配置裸盘 配置grid用户ssh互信 挂载安装软件文件夹 安装用于Linux的cvuqdisk 手动运行cvu使用验证程序验证O			

		

	

				

		

			

                【转】Oracle 11g Dataguard 参数详解
			

		

		

									

				转自:https://www.jb51.net/article/52269.htm 这篇文章主要介绍了Oracle 11g Dataguard参数详解,包含了独立参数.主库参数.备库参数的详细说明,需要的朋友可以参考下. 注:本文译自<Oracle Data Guard 11g Handbook> Page 78 – Page 88 就Data Guard(后面都写成DG)来说,我们只关注如下三种参数: 1.独立于数据库角色的参数2.数据库角色为primary时的参数3.数据库角色为stand			

		

	

				

		

			

                Linux Oracle 11g dataguard物理standby 配置过程
			

		

		

									

				这两天研究了下oracle 11g dataguard 物理standby 功能,总体来说这个功能满足公司需求,好了,不多说了,以下是详细的配置过程. 数据库的安装可以参考之前写的六步搞定Linux Oracle 11gR2 配置安装 注意:分别在主库和备库都安装上oracle软件,不装数据库. 主库: IP:192.168.77.5 主机名:nod1 ORACLE_SID=test ORACLE_BASE=/oracle/app/oracle ORACLE_HOME=/oracle/app/o			

		

	

				

		

			

                Oracle 11g dataguard三种模式以及实时查询（Real-time query）功能设置
			

		

		

									

				之前我们讨论过<Linux Oracle 11g dataguard物理standby 配置过程>, 但是在实际过程中会遇到不同的问题,首先我们讨论下ORACLE DATAGUARD的三种模式, 保护最大化:这种模式的配置可以保证主库和备库的同步,任何情况下主库的损毁都不会导致已提交数据的丢失.如果主库和备库之间的网络出现问题,或者备库本身出现问题,都会导致主库停止数据处理. 可用最大化:这种模式和上面一种类似,也是会保证主库和备库的同步,区别在于,当网络或备库不可用时,主库仍然可以继续处理.			

		

	

				

		

			

                Oracle 11G DataGuard生产环境重新启动详细过程
			

		

		

									

				场景,重启数据库,不重启linux系统,所以不用考虑监听程序,#linux输入lsnrctl start1 数据库关闭1.1 关闭主库SHUTDOWN IMMEDIATE; SQL> SHUTDOWN IMMEDIATE;                                                                                                                                          			

		

	

				

		

			

                Oracle Study之案例--Oracle 11g  DataGuard Snapshot Standby
			

		

		

									

				Oracle Study之案例--Oracle 11g  DataGuard Snapshot Standby Oracle 11g的Data Guard不仅仅带给我们的是Active Data Guard实时查询特性,同时还带来了另外一个新特性,这便是Snapshot Standby数据库功能,此项功能可将备库置身于"可读写状态"用于不方便在生产环境主库中测试的内容,比如模拟上线测试等任务.当备库读写状态下任务完成后,可以非常轻松的完成Snapshot Standby数据库角色切换回			

		

	

				

		

			

                Oracle 11G DataGuard ORA-16086问题修复详细过程
			

		

		

									

				1,问题描述,standby从库没有应用redo日志Tue Jul 22 09:05:07 2014RFS[8852]: Assigned to RFS process 12956RFS[8852]: Identified database type as 'physical standby': Client is ARCH pid 16028Tue Jul 22 09:05:09 2014RFS[8853]: Assigned to RFS process 12958RFS[8853]: Id