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作为oracle数据库提供的一种容灾方式,ADG在我们日常生产中还是比较常见的,如何更快更好的搭建一套ADG,也是一个DBA需要掌握的基本技能。
IP: 172.25.18.251
DATABASE VERSION: 11.2.0.4.0
DB_NAME:ptgbss
DB_UNIQUE_NAME:ptgbss
Standby Database
先搭建好备库的数据库软件,无需建库。保持主库和备库的DB_NAME参数一致,DB_UNIQUE_NAME参数不能一致。
主库配置
[oracle@localhost ~]$ telnet 172.25.18.252 1521
Trying 172.25.18.252...
Connected to 172.25.18.252.
Escape character is ^].
^C
^CConnection closed by foreign host.
[oracle@localhost ~]$
vi /u01/product/11.2.0/db_1/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
PTGBSS =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.25.18.251)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ptgbss)
)
)
PTGBSSDG =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.25.18.252)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ptgbssdg)
(UR=A)
)
)
tnsping 测试一下是否通:
[oracle@localhost admin]$ tnsping ptgbssdg
2.3 主库开启force_logging
查看是否已经开始强制日志:
select force_logging from v$database;
开启强制日志:
ALTER DATABASE FORCE LOGGING;
2.4 主库配置DG相关参数
主库添加standby 日志,日志大小与online日志保持一致,数量比online日志数量多一组:
set line 200
col member for a50
SELECT * FROM V$LOGFILE;
alter database add standby logfile thread 1 group 10 /u01/oradata/ptgbss/redo10.log size 1024M;
alter database add standby logfile thread 1 group 11 /u01/oradata/ptgbss/redo11.log size 1024M;
alter database add standby logfile thread 1 group 12 /u01/oradata/ptgbss/redo12.log size 1024M;
alter database add standby logfile thread 1 group 13 /u01/oradata/ptgbss/redo13.log size 1024M;
alter database add standby logfile thread 1 group 14 /u01/oradata/ptgbss/redo14.log size 1024M;
alter database add standby logfile thread 1 group 15 /u01/oradata/ptgbss/redo15.log size 1024M;
alter database add standby logfile thread 1 group 16 /u01/oradata/ptgbss/redo16.log size 1024M;
alter database add standby logfile thread 1 group 17 /u01/oradata/ptgbss/redo17.log size 1024M;
alter database add standby logfile thread 1 group 18 /u01/oradata/ptgbss/redo18.log size 1024M;
alter database add standby logfile thread 1 group 19 /u01/oradata/ptgbss/redo19.log size 1024M;
修改DG相关参数:
alter system set LOG_ARCHIVE_CONFIG=DG_CONFIG=(ptgbss,ptgbssdg) scope=both ;
alter system set LOG_ARCHIVE_DEST_1=LOCATION=/data/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=ptgbss scope=both;
alter system set LOG_ARCHIVE_DEST_2=SERVICE=ptgbssdg LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ptgbssdg scope=both;
alter system set LOG_ARCHIVE_DEST_STATE_1=ENABLE scope=both;
alter system set LOG_ARCHIVE_DEST_STATE_2=ENABLE scope=both;
alter system set FAL_SERVER=ptgbssdg scope=both;
alter system set FAL_CLIENT=ptgbss scope=both;
alter system set standby_file_management=auto;
alter system set db_file_name_convert=/data/ptgbssdg,/data/ptgbss scope=spfile;
alter system set log_file_name_convert=/u01/oradata/ptgbssdg,/u01/oradata/ptgbss scope=spfile;
2.5 生成PFILE参数文件
create pfile from spfile;
2.6 传输参数文件和密码文件到备库
[oracle@localhost dbs]$ scp /u01/product/11.2.0/db_1/dbs/initptgbss.ora 172.25.18.252:/u01/product/11.2.0/db_1/dbs
[oracle@localhost dbs]$ scp /u01/product/11.2.0/db_1/dbs/orapwptgbss 172.25.18.252:/u01/product/11.2.0/db_1/dbs
备库相关参数配置
1)数据文件目录
2)日志文件目录
3)归档目录
3.2 备库配置listener.ora
[oracle@ptgbssdg ~]$ vi /u01/product/11.2.0/db_1/network/admin/listener.ora
# listener.ora Network Configuration File: /u01/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = ptgbssdg)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = ptgbss)
(ORACLE_HOME = /u01/product/11.2.0/db_1)
(SID_NAME = ptgbssdg)
)
)
3.3 备库配置tnsname
# tnsnames.ora Network Configuration File: /u01/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
PTGBSS =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.25.18.251)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ptgbss)
)
)
PTGBSSDG =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.25.18.252)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ptgbssdg)
)
)
3.4 备库修改参数文件
ptgbss.__db_cache_size=17448304640
ptgbssdg.__db_cache_size=16642998272
ptgbss.__java_pool_size=134217728
ptgbssdg.__java_pool_size=134217728
ptgbss.__large_pool_size=134217728
ptgbssdg.__large_pool_size=134217728
ptgbss.__oracle_base=/u01#ORACLE_BASE set from environment
ptgbssdg.__oracle_base=/u01#ORACLE_BASE set from environment
ptgbss.__pga_aggregate_target=3422552064
ptgbssdg.__pga_aggregate_target=3422552064
ptgbss.__sga_target=19327352832
ptgbssdg.__sga_target=19327352832
ptgbss.__shared_io_pool_size=0
ptgbssdg.__shared_io_pool_size=0
ptgbss.__shared_pool_size=1476395008
ptgbssdg.__shared_pool_size=2281701376
ptgbss.__streams_pool_size=0
ptgbssdg.__streams_pool_size=0
*.audit_file_dest=/u01/admin/ptgbss/adump --此处修改
*.audit_trail=db
*.compatible=11.2.0.4.0
*.control_files=/u01/oradata/ptgbssdg/control01.ctl,/u01/fast_recovery_area/ptgbssdg/control02.ctl --此处修改存放控制文件路径
*.db_block_size=8192
*.db_domain=
*.db_file_name_convert=/data/ptgbss,/data/ptgbssdg --此处修改
*.db_name=ptgbss --此处修改
*.db_recovery_file_dest=/u01/fast_recovery_area --此处修改对应的路径
*.db_recovery_file_dest_size=4385144832
*.db_unique_name=ptgbssdg --此处修改
*.diagnostic_dest=/u01
*.dispatchers=(PROTOCOL=TCP) (SERVICE=ptgbssXDB)
*.fal_client=PTGBSSDG --此处修改
*.fal_server=PTGBSS --此处修改
*.log_archive_config=DG_CONFIG=(ptgbssdg,ptgbss) --此处修改
*.log_archive_dest_1=location=/data/arch --此处修改
*.log_archive_dest_2=SERVICE=ptgbssdg LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ptgbssdg --此处修改
*.log_archive_dest_state_1=ENABLE --修改此处参数
*.log_archive_dest_state_2=ENABLE --修改此处参数
*.log_file_name_convert=/u01/oradata/ptgbss,/u01/oradata/ptgbssdg --此处修改对应路径
*.open_cursors=300
*.pga_aggregate_target=3365928960
*.processes=150
*.remote_login_passwordfile=EXCLUSIVE
*.sga_max_size=19327352832
*.sga_target=19327352832
*.standby_file_management=AUTO
*.undo_tablespace=UNDOTBS1
3.5 启动备库到nomount状态,启动监听
启动监听lsnrctl start:
---主库和备库都需要验证连通性:
sqlplus sys/oracle@ptgbss AS SYSDBA
sqlplus sys/oracle@ptgbssdg AS SYSDBA
3.6 使用RMAN DUPLICATE 主库到备库
rman target sys/oracle@ptgbss auxiliary sys/oracle@ptgbssdg
run
{
allocate channel cl1 type disk;
allocate channel cl2 type disk;
allocate channel cl3 type disk;
allocate auxiliary channel c1 type disk;
allocate auxiliary channel c2 type disk;
allocate auxiliary channel c3 type disk;
duplicate target database for standby from active database nofilenamecheck;
release channel c1;
release channel c2;
release channel c3;
}
备库开启日志应用并查看
4.1 duplicate成功后在备库开启日志应用
alter database open;
alter database recover managed standby database using current logfile disconnect from session;
select sequence#,thread#,applied from v$archived_log;
4.2 查看日志应用情况
col name for a50
select name,SEQUENCE#,APPLIED from v$archived_log order by sequence#;
select max(sequence#) from v$archived_log where applied=YES;
select thread#,max(sequence#) from v$archived_log where applied=YES group by threa
查看错误:
select dest_id,error from v$archive_dest;
查看gap:
select * from v$archive_gap;
查看standby日志状态:
查看备库状态:
select MESSAGE from v$dataguard_status;
总 结:
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