rman 作为 oracle 推荐的备份、恢复方式，我们常使用它来进行异机迁移数据库。
网上的攻略都是 rman 的热备份异机迁移，相比冷备份的异机迁移需要多备份归档（未归档）日志文件、联机日志文件，操作步骤较为复杂。
如果是可以停机的数据库，更推荐使用 mount 方式下的冷备份来做异机迁移。
写了一个迁移文件，以备后用。
Part1
Env
{
‘first database’:{
‘os’:’suse11’
‘oracle_version’:’11gr2’
}
‘second database’:{
‘os’:’suse11’
‘oracle_version’:’11gr2’
}
}
Set a nfs service for first database
mkdir /nfs
chmod -R 777 /nfs
echo '/nfs *(fsid=0,crossmnt,rw,root_squash,sync,no_subtree_check)' >>/etc/exports
service nfsserver restart
Mount nfs dir in first database
mount -t nfs x.x.x.x:/nfs /nfs
Run backup script in the nfs dir
run {
allocate channel c1 type disk;
allocate channel c2 type disk;
backup database format '/nfs/%U';
backup current controlfile format '/nfs/%U.bak';
release channel c1;
release channel c2;
}
Part2
Get ready in second database
Make dir for second database;
mkdir -p /opt/oracle/oradata/orcl
mkdir -p /opt/oracle/admin/orcl
cd /opt/oracle/admin/orcl
mkdir adump bdump udump cdump pfile
mkdir /opt/oracle/flash_recovery_area
mkdir /opt/oracle/flash_recovery_area/orcl
Create password file
orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=xxxxx
Recover second database
Set DBID
set dbid xxxxxxx
Start Second database numount
startup nomount
Restore pfile
restore spfile to pfile '/opt/oracle/product/11.2.0/db_1/dbs/initorcl.ora' from '/nfs/1aq10otf_1_1';
Start database by new pfile
shutdown immediate;
startup nomount;
Restore control file
restore controlfile from '/nfs/xxx/xxx'
Recovery database
alter database mouont;
restore database;
alter database open resetlogs;