RAC怎么进行从带库到单实例的恢复

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备份软件：HP-DP
原库：生产RAC 2节点，IP：192.168.160.2和192.168.160.3
目标库：单实例库，IP：192.168.160.129
0. 准备环境
    配置好目标服务器的监听，让备份服务器可以链接到目标服务器。
1. 恢复控制文件
 对于备份软件恢复控制文件，是直接将其恢复到目标服务器的os上的，一般是在var目录下。
 登陆备份服务器，点开DP软件，选择RESTORE，找到原库的备份。然后在SOURCE选择"CONTROL FILE FROM DP MANAGED BACKUP"，在OPTIONS中配置：Clinet=恢复的目标服务器，user name=oracle（目标服务器的oracle软件的os用户），User group=oinstall,Restore mode=Normal，Restore unitl=selected time，我这里选择的是20131227 22:00点。在Settings中配置目标服务器的sys密码和service_name。然后点击restore即可。随后去目标服务器（160.129）的/var/opt/omni/tmp/下找新产生的控制文件。
备注：Client这里要选择在备份服务器中配置的192.168.160.129所对应的别名，这里的别名一般都是主机名。
2. 恢复spfile
 现在已经有控制文件，其实参数文件，我们自己造一个就行，但如果想恢复的话，也是可以的。首先自己造一个参数文件，或者直接startup nomount force也行。随后恢复控制文件，并启动到mount，然后恢复spfile，具体如下：
SQL> startup nomount force
RMAN> restore controlfile from '/var/opt/omni/tmp/ctrl_ORCLDB.dbf';
RMAN> alter database mount;
RMAN> run {
 allocate channel 'dev_0' type 'sbt_tape'
 parms 'SBT_LIBRARY=/opt/omni/lib/libob2oracle8_64bit.so,ENV=(OB2BARTYPE=Oracle8,OB2APPNAME=mubiao_dbname,OB2BARLIST=mubiao_dbname)';
send device type 'sbt_tape' 'OB2BARHOSTNAME=yuanku_hostname';
 restore spfile to '/home/orazkf/spfileORCL1.ora' from autobackup;
release channel 'dev_0';
 }
released channel: ORA_DISK_1
allocated channel: dev_0
channel dev_0: SID=893 instance=ORCL1 device type=SBT_TAPE
channel dev_0: Data Protector A.06.20/PHSS_42081/DPSOL_00448/DPLNX_00154
sent command to channel: dev_0
Starting restore at 07-JAN-14
channel dev_0: looking for AUTOBACKUP on day: 20140107
channel dev_0: AUTOBACKUP found: c-3400117082-20140107-00
channel dev_0: restoring spfile from AUTOBACKUP c-3400117082-20140107-00
channel dev_0: SPFILE restore from AUTOBACKUP complete
Finished restore at 07-JAN-14
released channel: dev_0
  现在可以用恢复的spfile和控制文件，将数据库启动到mount状态。但需要注意的是，需要修改归档目录，dump目录等。
3. 恢复数据文件
 对于rac到单实例的恢复，肯定是要做set newname的，因为rac的数据文件都存在在磁盘组里，而本来都是在fs中。
RMAN>run {
allocate channel 'dev_0' type 'sbt_tape'
parms 'SBT_LIBRARY=/opt/omni/lib/libob2oracle8_64bit.so,ENV=(OB2BARTYPE=Oracle8,OB2APPNAME=mubiao_dbname,OB2BARLIST=mubiao_dbname)';
send device type 'sbt_tape' 'OB2BARHOSTNAME=yuanku_hostname';
set newname for datafile  1 to '/pmsdb/oradata/ORCL1/data1/system.345.760169914';
set newname for datafile 2 to '/pmsdb/oradata/ORCL1/data1/sysaux.564.760187953';
set newname for datafile 3 to '/pmsdb/oradata/ORCL1/data1/undotbs1.124.760889985';
set newname for datafile 4 to '/pmsdb/oradata/ORCL1/data1/undotbs2.456.760990001';
set newname for datafile 5 to '/pmsdb/oradata/ORCL1/data1/users.167.760190409';
set newname for datafile 6 to '/pmsdb/oradata/ORCL1/data1/undotbs1.281.760310569';
set newname for datafile 7 to '/pmsdb/oradata/ORCL1/data1/undotbs2.282.760110751';
set newname for datafile 24 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata101.dbf';
set newname for datafile 25 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata102.dbf';
set newname for datafile 26 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata103.dbf';
set newname for datafile 27 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata104.dbf';
set newname for datafile 28 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata105.dbf';
set newname for datafile 29 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata106.dbf';
set newname for datafile 30 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata107.dbf';
set newname for datafile 31 to '/pmsdb/oradata/ORCL1/data1/ORCLrddata108.dbf';
set newname for datafile 32 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex101.dbf';
set newname for datafile 33 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex102.dbf';
set newname for datafile 34 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex103.dbf';
set newname for datafile 35 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex104.dbf';
set newname for datafile 36 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex105.dbf';
set newname for datafile 37 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex106.dbf';
set newname for datafile 38 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex107.dbf';
set newname for datafile 39 to '/pmsdb/oradata/ORCL1/data1/ORCLrdindex108.dbf';
restore database;
switch datafile all;
release channel 'dev_0';
}
 静静的等待很久，最后恢复成功。
4. 恢复归档文件
RMAN>run {
 allocate channel 'dev_0' type 'sbt_tape'
 parms 'SBT_LIBRARY=/opt/omni/lib/libob2oracle8_64bit.so,ENV=(OB2BARTYPE=Oracle8,OB2APPNAME=ORCL1,OB2BARLIST=ORCL1)';
  send device type 'sbt_tape' 'OB2BARHOSTNAME=yuanku_hostname';
 restore archivelog time between "to_date('2013-12-27 22:00:00','YYYY-MM-DD HH24:MI:SS')" and "to_date('2013-12-27 22:30:00','YYYY-MM-DD HH24:MI:SS')";
  release channel 'dev_0';     
 }
由于我在此之前已经设置好新的归档目录，所以待恢复归档完毕后，去我的归档目录下查看，就会发现有几个归档文件。
5 执行recover
RMAN>recover database;
6 执行open resetlogs
 再此之前需要设置好闪回恢复区的大小，因为此时oracle可能会将新的onlinelog放在你的闪回恢复区中，所有要设置好大小正好，才可以启动成功。

以上就是RAC怎么进行从带库到单实例的恢复，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。