--備庫standby
主庫四個redolog 以前都是50m大小
sql>
alter database recover managed standby database cancel;
database altered.
sql> alter database add standby logfile group 11 ('+data/orcldg/onlinelog/standby_group_11.log') size 60m;
alter database add standby logfile group 12 ('+data/orcldg/onlinelog/standby_group_12.log') size 60m;
alter database add standby logfile group 13 ('+data/orcldg/onlinelog/standby_group_13.log') size 60m;
alter database add standby logfile group 14 ('+data/orcldg/onlinelog/standby_group_14.log') size 60m;
alter database add standby logfile group 15 ('+data/orcldg/onlinelog/standby_group_15.log') size 60m;
alter database add standby logfile group 16 ('+data/orcldg/onlinelog/standby_group_16.log') size 60m;
備庫standby刪除
alter database drop logfile group 5;
alter database drop logfile group 6;
alter database drop logfile group 7;
alter database drop logfile group 8;
alter database drop logfile group 9;
alter database drop logfile group 10;
主庫redo新增
alter database add logfile thread 1 group 11 ('+data/orcl/onlinelog/group_11.log') size 60m;
alter database add logfile thread 1 group 12 ('+data/orcl/onlinelog/group_12.log') size 60m;
alter database add logfile thread 2 group 13 ('+data/orcl/onlinelog/group_13.log') size 60m;
alter database add logfile thread 2 group 14 ('+data/orcl/onlinelog/group_14.log') size 60m;
主庫redo 刪除
alter database drop logfile group 1;
alter database drop logfile group 2;
alter database drop logfile group 3;
alter database drop logfile group 4;
備庫redo新增
剛開始刪除的時候可能報錯,執行以下命令:
alter system set standby_file_management='manual';
然後刪除
alter database add logfile group 5 ('+data/orcldg/onlinelog/group_05.log') size 60m;
alter database add logfile group 6 ('+data/orcldg/onlinelog/group_06.log') size 60m;
alter database add logfile thread 2 group 7 ('+data/orcldg/onlinelog/group_07.log') size 60m;
alter database add logfile thread 2 group 8 ('+data/orcldg/onlinelog/group_08.log') size 60m;
alter database clear logfile '+data/orcldg/onlinelog/group_2.272.862167353'
備庫redo刪除
alter database drop logfile group 1;
alter database drop logfile group 2;
alter database drop logfile group 3;
alter database drop logfile group 4;
--這種也是可以的
alter database add logfile member ('+data/orcldg/onlinelog/group_2.273.862167353') size 60m reuse;
create spfile from pfile='$oracle_home/dbs/pfile_for_standby.txt'
如果遇到錯誤可以檢視 log_file_name_convert 與 db_file_name_convert 是否有問題
alter system set log_file_name_convert='+data/orcl/onlinelog, +data/orcldg/onlinelog' scope=spfile;
alter system set db_file_name_convert='+data/orcl/datafile, +data/orcldg/datafile' scope=spfile;
--主庫standby 刪除
alter database drop logfile group 5;
alter database drop logfile group 6;
alter database drop logfile group 7;
alter database drop logfile group 8;
alter database drop logfile group 9;
alter database drop logfile group 10;
主庫standby 新增
alter database add standby logfile group 5 ('+data/orcl/onlinelog/standby_group_05.log') size 60m reuse;
alter database add standby logfile group 6 ('+data/orcl/onlinelog/standby_group_06.log') size 60m reuse;
alter database add standby logfile group 7 ('+data/orcl/onlinelog/standby_group_07.log') size 60m reuse;
alter database add standby logfile group 8 ('+data/orcl/onlinelog/standby_group_08.log') size 60m reuse;
alter database add standby logfile group 9 ('+data/orcl/onlinelog/standby_group_9.log') size 60m reuse;
alter database add standby logfile group 10 ('+data/orcl/onlinelog/standby_group_10.log') size 60m reuse;
然後在備庫執行
alter database recover managed standby database using current logfile disconnect;
alter system set standby_file_management='auto';
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