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4、再次在2个节点进行多次日志切换
SQL> alter system switch logfile;
System altered.
SQL> r
1* alter system switch logfile
5、 全部关闭ORACLEC RAC数据库
Srvctl stop database –d ppzhu
6、 在节点2启动到nomount状态，并且进行控制文件恢复
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 608174080 bytes
Fixed Size 1275104 bytes
Variable Size 192940832 bytes
Database Buffers 406847488 bytes
RMAN> restore controlfile from '/archivelog/bak_745771065_14_1.bak';
Starting restore at 14-MAR-11
using channel ORA_DISK_1
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output filename=/dev/raw/raw21
output filename=/dev/raw/raw22
output filename=/dev/raw/raw23
Finished restore at 14-MAR-11
7、 启动数据库在MOUNT节点准备RESTORE 数据文件
RMAN> sql 'alter database mount';
sql statement: alter database mount
released channel: ORA_DISK_1
8、 进行数据文件恢复，我这里使用的数据文件是第一次备份时候的数据文件，而控制文件是第二次备份的时候的控制文件。使用FROM TAG就能控制恢复的数据文件备份集，TAG就是一个对备份片的标示而已。
RMAN> restore database from tag='TAG20110314T142928';
Starting restore at 14-MAR-11
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=151 instance=ppzhu1 devtype=DISK
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /dev/raw/raw5
restoring datafile 00002 to /dev/raw/raw7
restoring datafile 00003 to /dev/raw/raw6
restoring datafile 00004 to /dev/raw/raw10
restoring datafile 00005 to /dev/raw/raw8
channel ORA_DISK_1: reading from backup piece /archivelog/bak_10_1_745770568.bak
channel ORA_DISK_1: restored backup piece 1
piece handle=/archivelog/bak_10_1_745770568.bak tag=TAG20110314T142928
channel ORA_DISK_1: restore complete, elapsed time: 00:00:35
Finished restore at 14-MAR-11
9、 进行不完全恢复，因为新的控制文件中没有归档备份
archive log filename=/archivelog/1_133_743871413.dbf recid=36 stamp=745771084
archive log filename=/archivelog/2_104_743871413.dbf recid=35 stamp=745771067
的信息，所以这里只能进行不完全恢复，使用UNTIL 可以控制。
RMAN> recover database until sequence 132;
Starting recover at 14-MAR-11
using channel ORA_DISK_1
starting media recovery
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=129
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=100
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=101
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=130
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=102
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=103
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=131
channel ORA_DISK_1: reading from backup piece /archivelog/arch_745770993_12_1.bak
channel ORA_DISK_1: restored backup piece 1
piece handle=/archivelog/arch_745770993_12_1.bak tag=TAG20110314T143632
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
archive log filename=/archivelog/2_100_743871413.dbf thread=2 sequence=100
archive log filename=/archivelog/1_129_743871413.dbf thread=1 sequence=129
archive log filename=/archivelog/2_101_743871413.dbf thread=2 sequence=101
archive log filename=/archivelog/1_130_743871413.dbf thread=1 sequence=130
archive log filename=/archivelog/2_102_743871413.dbf thread=2 sequence=102
archive log filename=/archivelog/2_103_743871413.dbf thread=2 sequence=103
archive log filename=/archivelog/1_131_743871413.dbf thread=1 sequence=131
media recovery complete, elapsed time: 00:00:03
Finished recover at 14-MAR-11
RMAN> recover database until sequence 133;
Starting recover at 14-MAR-11
using channel ORA_DISK_1
starting media recovery
archive log thread 2 sequence 103 is already on disk as file /archivelog/2_103_743871413.dbf
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=132
channel ORA_DISK_1: reading from backup piece /archivelog/arch_745770993_12_1.bak
channel ORA_DISK_1: restored backup piece 1
piece handle=/archivelog/arch_745770993_12_1.bak tag=TAG20110314T143632
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
archive log filename=/archivelog/1_132_743871413.dbf thread=1 sequence=132
archive log filename=/archivelog/2_103_743871413.dbf thread=2 sequence=103
media recovery complete, elapsed time: 00:00:02
Finished recover at 14-MAR-11
我这里第一次使用sequence 132 发现133没有用到所以再一次使用了 sequence 133
其实这里只要一次recover database until sequence 133;就可以了。
10、 启动数据库使用RESETLOGS。
SQL> alter database open resetlogs;
Database altered.
11、 启动另外一个节点
SQL> startup;
ORACLE instance started.
Total System Global Area 608174080 bytes
Fixed Size 1275104 bytes
Variable Size 218106656 bytes
Database Buffers 381681664 bytes
Redo Buffers 7110656 bytes
Database mounted.
Database opened.
到此数据库恢复完成。
所以在RAC备份时候最好把归档日志文件和备份集合都放在一个可以共享的目录下，并且目录名要相同，方便恢复。
