February 17, 2005
在高级复制中如何切换主体定义站点
作者:eygle
出处:http://blog.eygle.com
这是一个同步复制环境，在同步复制中，任何一个站点Down掉都会导致数据库服务中断。1.停掉主体定义站点(CONNER.HURRAY.COM.CN)
[oracle@jumper oracle]$ sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.4.0 - Production on Thu Feb 17 16:07:26 2005 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production With the Partitioning option JServer Release 9.2.0.4.0 - Production SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. |
2.登陆主体站点(TESTORA9.HURRAY.COM.CN)
SQL> select * from dept;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
60 ORACLE BEIJING
70 oracle beijing
6 rows selected.
|
此时主体站点上对于扶植对象的任何DML操作都不能进行了。
SQL> insert into dept values(80,'oracle','beijing'); insert into dept values(80,'oracle','beijing') * ERROR at line 1: ORA-02068: following severe error from CONNER ORA-03113: end-of-file on communication channel ORA-02068: following severe error from CONNER ORA-03113: end-of-file on communication channel |
3.使用复制管理员登陆主体站点
如果此时尝试删除复制对象，打破复制关系都会收到错误。
ORA-23312说明这不是主体定义站点。
SQL> connect repadmin/repadmin Connected. SQL> exec DBMS_REPCAT.DROP_MASTER_REPOBJECT(sname => 'scott',oname => 'dept',type => 'table'); BEGIN DBMS_REPCAT.DROP_MASTER_REPOBJECT(sname => 'scott',oname => 'dept',type => 'table'); END; * ERROR at line 1: ORA-23312: not the masterdef according to TESTORA9.HURRAY.COM.CN ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86 ORA-06512: at "SYS.DBMS_REPCAT_UTL4", line 2928 ORA-06512: at "SYS.DBMS_REPCAT_UTL4", line 2720 ORA-06512: at "SYS.DBMS_REPCAT", line 643 ORA-06512: at line 1 |
4.使用DBMS_REPCAT.RELOCATE_MASTERDEF切换主体定义站点
SQL> BEGIN 2 DBMS_REPCAT.RELOCATE_MASTERDEF ( 3 gname => 'rep_tt', 4 old_masterdef => 'CONNER.HURRAY.COM.CN', 5 new_masterdef => 'TESTORA9.HURRAY.COM.CN', 6 notify_masters => TRUE, 7 include_old_masterdef => FALSE); 8 END; 9 / PL/SQL procedure successfully completed. |
5.把原主体定义站点(CONNER.HURRAY.COM.CN)从主体库中删除
SQL> execute dbms_repcat.remove_master_databases(gname=>'rep_tt',master_list=>'CONNER.HURRAY.COM.CN'); PL/SQL procedure successfully completed. |
6.复制关系打破以后，DML操作得以继续
SQL> connect scott/tiger
Connected.
SQL> select * from dept;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
60 ORACLE BEIJING
70 oracle beijing
6 rows selected.
SQL> insert into dept values (80,'oracle','beijing');
1 row created.
SQL> commit;
Commit complete.
SQL>
|
7.如果原站点恢复正常后，可以再次添加到复制组中。
Posted by eygle at 5:40 PM | Comments (3)