原来的数据库服务器使用rman进行全库的备份，然后再异地的服务器上恢复一模一样的数据库
1.1 原服务器备份数据库
第一步，查看数据库的实例名和DBID
connected to target database: DB3 (DBID=2060124769, not open)
第二步，进行全备份
backup AS COMPRESSED BACKUPSET database
include current controlfile format ‘/orabak/db_%d_%T_%s‘
plus archivelog format ‘/orabak/arch_%d_%T_%s‘ ;
第三步，查看数据库文件的位置： /home/oracle/oradata/db3/
第四步，将备份文件arch_DB3_20140910_8和 db_ DB3_20140910_7复制异机上/home/oracle/orabak
1.2 目标服务器上创建数据库
第一步，创建实例名相同（db3）,数据库文件的位置相同（/home/oracle/oradata/db3/）的数据库。
第二步，关闭实例，启动到nomount状态。Sql>startup nomount;
第三步，设置dbid和原数据库dbid相同
rman target/
Recovery Manager: Release 10.2.0.5.0 - Production on Thu Sep 11 19:53:50 2014
Copyright (c) 1982, 2007, Oracle. All rights reserved.
connected to target database: db3 (not mounted)
RMAN> set dbid 2060124769
executing command: SET DBID
第四步，恢复控制文件
RMAN> restore controlfile from ‘/home/oracle/db_DB3_20140910_7‘;
Starting restore at 11-SEP-14
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=153 devtype=DISK
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:05
output filename=/home/oracle/oradata/db3/db3/control01.ctl
output filename=/home/oracle/oradata/db3/db3/control02.ctl
output filename=/home/oracle/oradata/db3/db3/control03.ctl
Finished restore at 11-SEP-14
第五步，mount数据库
RMAN> alter database mount;
database mounted
released channel: ORA_DISK_1
第六步，注册从源数据库拷贝过来的备份集到rman中
RMAN> catalog start with ‘/home/oracle/orabak‘;
searching for all files that match the pattern /home/oracle/orabak
List of Files Unknown to the Database
=====================================
File Name: /home/oracle/orabak/arch_DB3_20140910_8
File Name: /home/oracle/orabak/db_DB3_20140910_7
Do you really want to catalog the above files (enter YES or NO)? yes
cataloging files...
cataloging done
第七步，恢复归档日志
RMAN> restore archivelog all;
Starting restore at 11-SEP-14
using channel ORA_DISK_1
archive log thread 1 sequence 6 is already on disk as file /oracle/product/10.2.0.5/dbs/arch1_6_857918757.dbf
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=3
channel ORA_DISK_1: reading from backup piece /home/oracle/orabak/arch_DB3_20140910_1
channel ORA_DISK_1: restored backup piece 1
piece handle=/home/oracle/orabak/arch_DB3_20140910_1 tag=TAG20140910T172944
（注：如果不恢复归档日志，
RMAN> recover database;
Starting recover at 11-SEP-14
using channel ORA_DISK_1
starting media recovery
unable to find archive log
archive log thread=1 sequence=7）
第八步，恢复数据库文件（因为目标数据库和原数据库的数据文件位置相同，所以简单些）
RMAN> restore database;
Starting restore at 11-SEP-14
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /home/oracle/oradata/db3/system01.dbf
restoring datafile 00002 to /home/oracle/oradata/db3/undotbs01.dbf
restoring datafile 00003 to /home/oracle/oradata/db3/sysaux01.dbf
restoring datafile 00004 to /home/oracle/oradata/db3/users01.dbf
channel ORA_DISK_1: reading from backup piece /home/oracle/orabak/db_DB3_20140910_6
channel ORA_DISK_1: restored backup piece 1
piece handle=/home/oracle/orabak/db_DB3_20140910_6 tag=TAG20140910T173540
第九步，恢复数据库
RMAN> recover database;
Starting recover at 11-SEP-14
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=152 devtype=DISK
starting media recovery
media recovery complete, elapsed time: 00:00:03
Finished recover at 11-SEP-14
第十步，启动数据库
alter database open resetlogs;