ORACLE 10G DATAGUARD实战步骤
具体步骤如下：
一、主库操作
1、修改主库属性：
alter system force logging;
##查看状态
select FORCE_LOGGING from v$database;
2、修改数据库为归档模式：
archive log list;
shutdown immediate;
startup mount;
alter database archivelog;(alter database noarchivelog;关掉归档模式)
archive log list;
3、添加standby logfile(也可以不加)
为主数据库添加"备用联机日志文件"，这里要保证备日志文件与主库联机日志文件相同大小。
添加备用日志文件是规则：
备用日志最少应该比redo log 多一个。推荐的备重做日志数依赖于主数据库上的线程数。
(每线程日志文件最大数目 + 1 ) * 线程数
alter database add standby logfile
group 4 ('/oracle2/app/oracle/oradata/std_redo04a.log','/oracle2/app/oracle/oradata/std_redo04b.log') size 50m,
group 5 ('/oracle2/app/oracle/oradata/std_redo05a.log','/oracle2/app/oracle/oradata/std_redo05b.log') size 50m,
group 6 ('/oracle2/app/oracle/oradata/std_redo06a.log','/oracle2/app/oracle/oradata/std_redo06b.log') size 50m,
group 7 ('/oracle2/app/oracle/oradata/std_redo07a.log','/oracle2/app/oracle/oradata/std_redo08b.dbf') size 50m;
否则备库在应用时报如下信息：
RFS[1]: No standby redo logfiles created
RFS[1]: Archived Log: '/oracle2/arch/1_30_633287861.dbf'
在主库添加完standby logfile后，当主库切换后备库后会自动使用备库的redo logfile，具体应用信息如下：
RFS[1]: Successfully opened standby log 4: '/oracle2/app/oracle/oradata/10g/redo04.log'
RFS[1]: Successfully opened standby log 4: '/oracle2/app/oracle/oradata/10g/redo04.log'
4、修改主库参数文件：
10g.__db_cache_size=1207959552
10g.__java_pool_size=16777216
10g.__large_pool_size=16777216
10g.__shared_pool_size=352321536
10g.__streams_pool_size=0
*.audit_file_dest='/oracle2/app/oracle/admin/10g/adump'
*.background_dump_dest='/oracle2/app/oracle/admin/10g/bdump'
*.compatible='10.2.0.3.0'
*.control_files='/oracle2/app/oracle/oradata/10g/control01.ctl','/oracle2/app/oracle/oradata/10g/control02.ctl','/oracle2/app/oracle/oradata/10g/control03.ctl'
*.core_dump_dest='/oracle2/app/oracle/admin/10g/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='10g'
*.DB_UNIQUE_NAME='10gpri' [color=Red]###必须 定义每个数据库的唯一标识[/color]
*.log_archive_config='DG_CONFIG=(10gpri,10gstandby)' [color=Red]###必须[/color]
*.log_archive_dest_1='location=/oracle2/arch/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES)' DB_UNIQUE_NAME='10gpri' [color=Red]###必须 本地的归档路径[/color]
*.LOG_ARCHIVE_DEST_2='SERVICE=10gstandby arch ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=10gstandby' [color=Red]###必须(远程服务器端的归档日志)[/color]
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE
*.FAL_SERVER=10gpri [color=Red] ### 定义FAL服务器的Oracle Net服务的名称[/color]*.FAL_CLIENT=10gstandby [color=Red]### 定义备数据库的Oracle Net服务名 （这两个参数在主库可有可无，但备库必须有。ORACLE 老外工程师说这个必须有^_^） [/color]
*.db_recovery_file_dest='/oracle2/app/oracle/flash_recovery_area'
*.db_recovery_file_dest_size=2147483648
*.dispatchers='(PROTOCOL=TCP) (SERVICE=10gXDB)'
*.job_queue_processes=10
*.open_cursors=300
*.pga_aggregate_target=1707081728
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=1610612736
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/oracle2/app/oracle/admin/10g/udump'
*.STANDBY_FILE_MANAGEMENT=AUTO [color=Red] ###设置为AUTO,使得当数据文件添加到主数据库或者从主数据库删除的时候,对应的修改能够在备用数据库中自动执行.[/color]
5、用pfile启动，再重新创建spfile.
shutdown immediate;
startup pfile='./pfile.pra';
create spfile from pfile='./pfile.ora';
shutdown immediate;
startup;
6、在主库创建密码文件、以及控制文件。
orapwd file=orapw10gstandby.ora password=change_on_install entries=10
alter database create standby database controlfile '/tmp/standby.ctl';
7、TNS信息如下：
主库
10g=
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.169.1.204)(PORT = 1921))
)
(CONNECT_DATA =
(SID = 10g)
)
)
10gpri=
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.169.1.224)(PORT = 1921))
)
(CONNECT_DATA =
(SID = 10g)
)
)
10gstandby =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.169.1.204)(PORT = 1921))
)
(CONNECT_DATA =
(SID = 10g)
)
)
8、对主库进行全库备份
run {
allocate channel t1 type disk;
allocate channel t2 type disk;
backup database format '/tmp/full_%s';
release channel t1;
release channel t2;
}