1.环境：
a.主机环境：centos6.5
b.软件环境：oracle 11.2.0.4
c.主机信息：
DG1：192.168.100.51（数据库sid：atest）
DG2：192.168.100.52
2.前提工作（主从都要设置）：
a.关闭防火墙：/etc/init.d/iptables stop
b.关闭selinux：setenforce 0
查看状态：getenforce（关闭状态：Permissive）
3.主库设置：
a.设置主库db_unique_name：
alter system set db_unique_name='patest' scope=spfile;
b.设置主库为强制记录日志：
alter database force logging;
检查状态(YEs为强制)：
select name,force_logging from v$database;
c.设置standy_file_management：
alter system set standby_file_management ='AUTO';
d.创建standbylog：
alter database add standby logfile group 11 '/u01/app/oracle/oradata/ATEST/standbylog/standby11.log' size 50m;
alter database add standby logfile group 12 '/u01/app/oracle/oradata/ATEST/standbylog/standby12.log' size 50m;
alter database add standby logfile group 13 '/u01/app/oracle/oradata/ATEST/standbylog/standby13.log' size 50m;
alter database add standby logfile group 14 '/u01/app/oracle/oradata/ATEST/standbylog/standby14.log' size 50m;
e.开启归档(简单不详述)：
alter system set log_archive_dest_1='location=/u01/app/oracle/oradata/ATEST/archivelog';
alter database archivelog;
f.开启DGbroker：
alter system set DG_BROKER_START=TRUE;
g.传输pfile和密码文件：
create pfile from spfile;
scp initatest.ora orapwatest 192.168.100.52:/u01/app/oracle/product/11.2.0/db1/dbs/
h.设置监听：atest,patest,patest_DGMGRL
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = atest)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
(SID_DESC =
(GLOBAL_DBNAME = patest)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
(SID_DESC =
(GLOBAL_DBNAME = patest_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = vijay01.database.com)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
i.设置tnsnames.ora
ATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.51)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
PATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.51)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
SATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.52)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
4.备库设置：
a.设置监听：atest,satest,satest_DGMGRL
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = atest)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
(SID_DESC =
(GLOBAL_DBNAME = satest)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
(SID_DESC =
(GLOBAL_DBNAME = satest_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/db1)
(SID_NAME = atest)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = vijay02.database.com)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
ADR_BASE_LISTENER = /u01/app/oracle
b.设置tnsnames.ora
ATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.52)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
SATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.52)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
PATEST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.51)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = atest)
)
)
5.备份主库：
a.rman target /
b.backup database;
6.在备库上克隆主库：
a.修改备库pfile上的db_unique_name=satest
b.启动数据库到nomount：
startup nomount
c.登陆rman：
rman target sys/123456@patest auxiliary sys/123456@satest
d.开始克隆：
duplicate target database for standby nofilenamecheck from active database;
7.设置DGbroker：
a.登陆dgmgrl：
dgmgrl sys/123456@patest
b.设置主库：
create configuration dgc as primary database is patest connect identifier is patest;
c.添加备库：
add database satest as connect identifier is satest maintained as physical;
d.启用配置文件:
enable configuration
e.查看DGbroker配置：
show configuration [verbose];
show database [verbose] 'satest';
show database 'patest''StatusReport';
f.查看数据库的DG状态：
SELECT GROUP#,dbid,archived,status from v$standby_log;
select dest_id,valid_type,valid_role,valid_now from v$archive_dest;
select process,status,group#,thread#,sequence# from v$managed_standby order by process,group#,thread#,sequence#;
select name,value,time_computed from v$dataguard_stats;
select timestamp,facility,dest_id,message_num,error_code,message from v$dataguard_status order by timestamp;
select recid,archived,applied from v$archived_log;
8.DG不同步检查步骤：
1.检查密码文件
2.检查网络
3.检查参数文件
4.检查防火墙或selinux
5.如以上均无问题，只能说明dg环境有问题，需要重新搭建dg（重新传输数据文件到主库，在重新同步）