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在Oracle數(shù)據(jù)庫中,DataGuard最主要的功能就是容災(zāi)。它可以分為物理STANDBY和邏輯STANDBY兩種。物理STANDBY主要用在主庫的歸檔日志方面;邏輯STANDBY主要應(yīng)用的是主庫的歸檔日志提取的SQL語句。本文主要論述的是DataGuard在虛擬機(jī)上的配置,包括STANDBY參數(shù)的文件的相關(guān)配置等。

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1.環(huán)境準(zhǔn)備
虛擬機(jī)版本:VMware GSX
操作系統(tǒng) :redhat linux 4
Primary主機(jī)
ip:192.168.111.131
db_name:wellcomm
db_unique_name:wellcomm
ip:192.168.111.131
db_name:wellcomm
db_unique_name:wellcommb
2.設(shè)置Primary主機(jī)為force logging模式
- alter database force logging;
3.在Primary 上面創(chuàng)建備用日志(為切換而用)
- alter database add standby logfile group 4 ('/u01/oracle/oradata/wellcomm/stdredo01.log') size 50m;
- alter database add standby logfile group 5 ('/u01/oracle/oradata/wellcomm/stdredo02.log') size 50m;
- alter database add standby logfile group 6 ('/u01/oracle/oradata/wellcomm/stdredo03.log') size 50m;
4.修改primary庫的參數(shù)
- alter system set db_unique_name='wellcomm' scope=spfile;
- alter system set log_archive_config='DG_CONFIG=(wellcomm,wellcommb)';
- alter system set log_archive_dest_1='LOCATION=/u01/oracle/oradata/wellcomm/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=wellcomm';
- alter system set log_archive_dest_2='SERVICE=wellcommb LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=wellcommb';
- alter system set log_archive_dest_state_1=enable;
- alter system set log_archive_dest_state_2=enable;
- alter system set log_archive_max_processes=10;
#p#
5.克隆Primary數(shù)據(jù)庫
- shutdown immediate
- startup mount
- backup database;
創(chuàng)建standby的控制文件
- alter database create standby controlfile as '/u01/oracle/controlbak.ctl';
創(chuàng)建standby的參數(shù)文件并按standby主機(jī)的配置修改
- create pfile='/u01/oracle/initwellcommb.ora' from spfile;
6.在standby主機(jī)上恢復(fù)數(shù)據(jù)庫(rman方式);
將5步的文件拷備到對(duì)應(yīng)位置(ftp)
startup mount pfile='';
修改參數(shù)文件
- db_name='ora10g1'
- db_unique_name='ora10g3'
- log_archive_config='DG_CONFIG=(wellcomm,wellcommb)'
- log_archive_dest_1='LOCATION=/u01/oracle/oradata/wellcommb/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=wellcommb'
- log_archive_dest_2='SERVICE=wellcomm LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=wellcomm'
- log_archive_dest_state_1=enable
- log_archive_dest_state_2=enable
- remote_login_passwordfile='EXCLUSIVE'
- log_archive_max_processes=10
- restore database;
7.監(jiān)聽配置和tns服務(wù)配置
(1)primary 主機(jī)上配置
listener.ora文件內(nèi)容如下:
- SID_LIST_LISTENER =
- (SID_LIST =
- (SID_DESC =
- (GLOBAL_DBNAME = wellcomm )
- (ORACLE_HOME = /u01/oracle/product/10.2.0/db_1)
- (SID_NAME = wellcomm )
- )
- )
- LISTENER =
- (DESCRIPTION_LIST =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.111.131)(PORT = 1521))
- )
- )
tnsnames.ora文件內(nèi)容如下:
- WELLCOMM =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = wangwang)(PORT = 1521))
- (CONNECT_DATA =
- (SERVER = DEDICATED)
- (SERVICE_NAME = wellcomm)
- )
- )
- WELLCOMMB =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.111.132)(PORT = 1521))
- (CONNECT_DATA =
- (SERVER = DEDICATED)
- (SERVICE_NAME = wellcommb)
- )
- )
#p#
(2)在standby主機(jī)上配置
listener.ora文件內(nèi)容如下:
- SID_LIST_LISTENER =
- (SID_LIST =
- (SID_DESC =
- (GLOBAL_DBNAME = wellcommb)
- (ORACLE_HOME = /u01/oracle/product/10.2.0/db_1)
- (SID_NAME = wellcommb)
- )
- )
- LISTENER =
- (DESCRIPTION_LIST =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = wangkang)(PORT = 1521))
- )
- )
tnsnames.ora文件內(nèi)容如下:
- WELLCOMM =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.111.131)(PORT = 1521))
- (CONNECT_DATA =
- (SERVICE = DEDICATED)
- (SERVICE_NAME = wellcomm)
- )
- )
- WELLCOMMB =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.111.132)(PORT = 1521))
- (CONNECT_DATA =
- (SERVER = DEDICATED )
- (SERVICE_NAME = wellcommb)
- )
- )
重啟監(jiān)聽
lsnrctl stop
lsnrctl start
8.在standby主機(jī)上啟動(dòng)應(yīng)用redo
alter database recover managed standby database disconnect from session;
(取消:alter database recover managed standby database cancel;)
9.確認(rèn)從Primary到Standby的Redo傳輸及應(yīng)用
(1)在Primary主機(jī)上執(zhí)行日志文件切換(***多次)
alter system switch logfile;
(2)查詢Primary的歸檔日志
select sequence#,applied,first_time,next_time from v$archived_log order by sequence#;
(3)查詢Standby的歸檔日志及其應(yīng)用
select sequence#,applied,first_time,next_time from v$archived_log order by sequence#;
注意applied字段顯示YES則表明該歸檔日志已被standby數(shù)據(jù)庫應(yīng)用了。
標(biāo)題名稱:虛擬機(jī)上Oracle10gDataGuard的配置
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