a.準備單執行個體伺服器,pfile檔案,啟動到nomount
b.備份rac資料庫
c.将備份檔案拷貝到單執行個體伺服器
d.在單執行個體伺服器上還原、恢複
e.resetlogs打開資料庫
f.rename redo檔案名
g.disable thread 2并删除其redo組
h.增加temp臨時表空間資料檔案
i.删除不必要的undo表空間
另外,備份、拷貝的環節就請參考其他文檔,就不介紹了,下面從第4步在單執行個體伺服器上還原、恢複與打開開始介紹;
rman> startup nomount
rman> restore controlfile to '/app/oracle/oradata/ctl01.dbf' from '/app/oracle/backup/ctl_23_1_855331400';
rman> run{startup mount;
set until sequence 870 thread 1;
set newname for datafile 1 to '/app/oracle/oradata/system.257.779207027';
set newname for datafile 3 to '/app/oracle/oradata/sysaux.262.779207043';
set newname for datafile 4 to '/app/oracle/oradata/users.260.779207053';
set newname for datafile 2 to '/app/oracle/oradata/undotbs1.264.779207043';
set newname for datafile 15 to '/app/oracle/oradata/pptest_tbs.282.793979093';
set newname for datafile 5 to'/app/oracle/oradata/undotbs2.268.779207507';
set newname for datafile 8 to'/app/oracle/oradata/tbs_p3w.271.780396123';
set newname for datafile 9 to'/app/oracle/oradata/tbs_p4w.274.780396125';
set newname for datafile 6 to'/app/oracle/oradata/tbs_p1w.270.780396121';
set newname for datafile 7 to'/app/oracle/oradata/tbs_p2w.273.780396123';
set newname for datafile 14 to'/app/oracle/oradata/pptest_tbs.279.781454807';
restore database;
switch datafile all;
recover database;
}
sys@racdb3> alter database rename file '+dg/racdb/onlinelog/group_1.263.779207025' to '/app/oracle/oradata/redo1.log';
rename 完所有redo檔案後,即可resetlogs打開資料庫;但是,實際操作中遇到bug7207932:rman restore from rac asm to single instance non asm fails with ora-00600 [kgeade_is_0] (文檔 id 1146703.1)
bug 7207932 ora-600 [kgeade_is_0] when renaming a file from asm to fs
要想繞開的方法則是重建控制檔案後,再打開資料庫
sys@racdb3> alter database backup controlfile to trace as '/tmp/ctl.trc' reuse resetlogs;
打開trace檔案,修改裡面的logfile部分資訊;然後重新開機資料庫到nomount狀态;
sys@racdb3> shutdown immediate
sql> startup nomount
create controlfile reuse database "racdb" resetlogs archivelog
maxlogfiles 50
maxlogmembers 2
maxdatafiles 2000
maxinstances 8
maxloghistory 292
logfile
group 1 '/app/oracle/oradata/group_1.263.779207025' size 10m,
group 2 '/app/oracle/oradata/group_2.259.779207027' size 10m,
group 3 '/app/oracle/oradata/group_3.258.779207027' size 10m
datafile
'/app/oracle/oradata/system.257.779207027',
'/app/oracle/oradata/undotbs1.264.779207043',
'/app/oracle/oradata/sysaux.262.779207043',
'/app/oracle/oradata/users.260.779207053',
'/app/oracle/oradata/undotbs2.268.779207507',
'/app/oracle/oradata/tbs_p1w.270.780396121',
'/app/oracle/oradata/tbs_p2w.273.780396123',
'/app/oracle/oradata/tbs_p3w.271.780396123',
'/app/oracle/oradata/tbs_p4w.274.780396125',
'/app/oracle/oradata/pptest_tbs.279.781454807',
'/app/oracle/oradata/pptest_tbs.282.793979093'
character set zhs16gbk
;
建立完成後,用backup controlfile進行恢複;
sys@racdb3> recover database using backup controlfile until cancel;
sys@racdb3>alter database add logfile thread 2
group 4 '/app/oracle/oradata/group_4.265.779207453' size 10m reuse,
group 5 '/app/oracle/oradata/group_5.266.779207459' size 10m reuse,
group 6 '/app/oracle/oradata/group_6.267.779207467' size 10m reuse;
sys@racdb3> alter database open resetlogs;
成功resetlogs打開後,還需要做一些去thread 2的操作;
sys@racdb3> alter database disable thread 2;
sys@racdb3> alter database drop logfile group 4;
alter database drop logfile group 4
*
error at line 1:
ora-00350: log 4 of instance unnamed_instance_2 (thread 2) needs to be archived
ora-00312: online log 4 thread 2: '/app/oracle/oradata/racdb/onlinelog/o1_mf_4_9ym2kvgf_.log'
sys@racdb3> alter database clear unarchived logfile group 4;
sys@racdb3> alter tablespace temp add tempfile '/app/oracle/oradata/temp01.dbf' size 10m reuse;
tablespace altered.
sys@racdb3> drop tablespace undotbs2 including contents and datafiles;
最新内容請見作者的github頁:http://qaseven.github.io/