Creating Standby From RMAN Compressed backup taken on Primary ....

Question

I am creating a Standby from RMAN Compressed backup taken on Primary.
On Primary, I have taken Compressed backup as follows:
RMAN> run
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
BACKUP AS COMPRESSED BACKUPSET DATABASE PLUS ARCHIVELOG format '/dboracle/orbit_pr_bkp/primary_%U';
backup current controlfile for standby format '/dboracle/orbit_pr_bkp/primary_cntl.bkp';
oracle@apl06635orbvu1:/dboracle/orbit_pr_bkp>ls -ltr
total 51652
-rw-r----- 1 oracle dba 11972608 Jan 7 13:45 primary_0tm1h32n_1_1
-rw-r----- 1 oracle dba 15762432 Jan 7 13:45 primary_0sm1h32n_1_1
-rw-r----- 1 oracle dba 16785920 Jan 7 13:45 primary_0rm1h32n_1_1
-rw-r----- 1 oracle dba 1088000 Jan 7 13:45 primary_0um1h32v_1_1
-rw-r----- 1 oracle dba 32768 Jan 7 13:45 primary_12m1h33r_1_1
-rw-r----- 1 oracle dba 7143424 Jan 7 13:47 primary_cntl.bkp
On Standby, I restored the control file as below:
RMAN> restore standby controlfile from '/dboracle/orbit_pr_bkp/primary_cntl.bkp';
Starting restore at 10-JAN-11
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=156 devtype=DISK
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output filename=/dboracle/orbit_dr/oradata/ORBIT_DR/controlfile/o1_mf_6lo6nwfr_.ctl
output filename=/dboracle/orbit_dr/flash_recovery_area/ORBIT_DR/controlfile/o1_mf_6lo6nwky_.ctl
Finished restore at 10-JAN-11
But, When I am trying to restore the datafiles, RMAN is throwing error:
RMAN> run {
allocate channel d1 type disk format '/dboracle/orbit_pr_bkp/primary_%U';
allocate channel d2 type disk format '/dboracle/orbit_pr_bkp/primary_%U';
restore database;
2> 3> 4> 5>
released channel: ORA_DISK_1
allocated channel: d1
channel d1: sid=155 devtype=DISK
allocated channel: d2
channel d2: sid=151 devtype=DISK
Starting restore at 10-JAN-11
released channel: d1
released channel: d2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 01/10/2011 05:38:56
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 4 found to restore
RMAN-06023: no backup or copy of datafile 3 found to restore
RMAN-06023: no backup or copy of datafile 2 found to restore
RMAN-06023: no backup or copy of datafile 1 found to restore
What would be the correct RMAN command?
Regards, Anirban

Answer 1

After your RESTORE the (standby) controlfile, you must MOUNT the database instance with "ALTER DATABASE MOUNT".
You can also then query the controlfile with a "LIST BACKUP" or "LIST BACKUP SUMMARY" in RMAN to see if the deseired backups have been cataloged in the controlfile.
Don't specify the format for the ALLOCATE CHANNEL when you RESTORE DATABASE. In fact, you don't need to ALLOCATE CHANNEL at all when the device type is the default value of DISK if your are on 10gR2 or above.
Hemant K Chitale