NBU将RAC数据库恢复到单机

恢复的过程和(https://www.cnblogs.com/abclife/p/5687993.html)差不多。
但是，具体过程有些不同。
如果按照之前的恢复方式，在run语句中同时运行restore和recover操作，虽然可以执行成功，但是在以resetlogs方式打开时会报错：

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-00392: log 3 of thread 1 is being cleared, operation not allowed
ORA-00312: online log 3 thread 1: '+abce'

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
+abce
+abce
+abce
+abce
+abce
+abce
+abce
+abce

8 rows selected.

SQL> 

从这里可以看到，在找redo日志的时候，还是从asm磁盘中查找。因此发生了问题。

解决方案：
解决方案就是分开执行。
1.首先restore数据库

run{
allocate channel ch01 type 'sbt_tape';
SEND 'NB_ORA_SERV=nbubak,NB_ORA_CLIENT=abce1';
set newname for datafile '+ABCE/simple/datafile/system.283.914330399' to '/u01/app/oracle/oradata/simple/system.283.914330399';
set newname for datafile '+ABCE/simple/datafile/sysaux.276.914330399' to '/u01/app/oracle/oradata/simple/sysaux.276.914330399';
set newname for datafile '+ABCE/simple/datafile/undotbs1.280.914330399' to '/u01/app/oracle/oradata/simple/undotbs1.280.914330399';
set newname for datafile '+ABCE/simple/datafile/users.284.914330399' to '/u01/app/oracle/oradata/simple/users.284.914330399';
set newname for datafile '+ABCE/simple/datafile/undotbs2.281.914330739' to '/u01/app/oracle/oradata/simple/undotbs2.281.914330739';
set newname for datafile '+ABCE/simple/datafile/simple2.289.914403223' to '/u01/app/oracle/oradata/simple/simple2.289.914403223';
set newname for datafile '+ABCE/simple/datafile/simple.290.914422933' to '/u01/app/oracle/oradata/simple/simple.290.914422933';
set newname for datafile '+ABCE/simple/datafile/zabbix.292.913197723' to '/u01/app/oracle/oradata/simple/zabbix.292.913197723';
set newname for datafile '+ABCE/simple/datafile/simple.301.981364941' to '/u01/app/oracle/oradata/simple/simple.301.981364941';
restore database;
switch datafile all;
release channel ch01;
}

2.如果有需要，要将归档日志备份恢复到指定位置

3.修改redo文件的路径和名称
执行以下命令，找出redo路径和名称

select 'alter database rename file '''||member||''' to ''/u01/app/oracle/oradata/simple'||substr(member,21)||''';' from v$logfile;

然后根据查出的结果，执行修改文件路径和名称

alter database rename file '+ABCE/simple/datafile/group_3.278.997540305' to '/u01/app/oracle/oradata/simple/group_3.278.997540305';
alter database rename file '+ABCE/simple/datafile/group_2.279.997539653' to '/u01/app/oracle/oradata/simple/group_2.279.997539653';
alter database rename file '+ABCE/simple/datafile/group_1.282.997539437' to '/u01/app/oracle/oradata/simple/group_1.282.997539437';
alter database rename file '+ABCE/simple/datafile/group_4.272.997539667' to '/u01/app/oracle/oradata/simple/group_4.272.997539667';
alter database rename file '+ABCE/simple/datafile/group_5.273.557540335' to '/u01/app/oracle/oradata/simple/group_5.273.557540335';
alter database rename file '+ABCE/simple/datafile/group_6.274.557535155' to '/u01/app/oracle/oradata/simple/group_6.274.557535155';
alter database rename file '+ABCE/simple/datafile/group_7.367.557535353' to '/u01/app/oracle/oradata/simple/group_7.367.557535353';
alter database rename file '+ABCE/simple/datafile/group_8.368.557535405' to '/u01/app/oracle/oradata/simple/group_8.368.557535405';

3.执行recover操作

run{
allocate channel ch01 type 'sbt_tape';
SEND 'NB_ORA_SERV=nbubak,NB_ORA_CLIENT=abce1';
recover database until scn 8500716647;
release channel ch01;
}

最后，记得修改一下临时文件。

SQL> create temporary tablespace temp2 tempfile '/u01/app/oracle/oradata/simple/temp02.dbf' size 200M autoextend off;
SQL> alter database default temporary tablespace temp2;
SQL> drop tablespace temp;

或者
SQL> drop tablespace temp including contents and datafiles cascade constraints（彻底删除包括操作系统中的临时表空间的数据文件）