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。更多详情敬请关注行业资讯频道。