RMAN Faster Backups using Section Clause

1. Configure the device with the required parallelism
RMAN> show device type;

RMAN configuration parameters for database with db_unique_name CVRMAN are:
CONFIGURE DEVICE TYPE DISK PARALLELISM 5 BACKUP TYPE TO BACKUPSET;


2. Use Section clause to specify the  size of the chunk in the backup statement to parallelize the backup of datafile by chunk of size 100m
RMAN> run
{
backup
as backupset
section size=100M
tag="Fast_backup"
datafile 2;
}

Starting backup at 15-MAY-2014 05:17:41
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=40 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=52 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=51 device type=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: SID=1 device type=DISK
allocated channel: ORA_DISK_5
channel ORA_DISK_5: SID=30 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 1 through 12800
channel ORA_DISK_1: starting piece 1 at 15-MAY-2014 05:17:51
channel ORA_DISK_2: starting full datafile backup set
channel ORA_DISK_2: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 12801 through 25600
channel ORA_DISK_2: starting piece 2 at 15-MAY-2014 05:17:55
channel ORA_DISK_3: starting full datafile backup set
channel ORA_DISK_3: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 25601 through 38400
channel ORA_DISK_3: starting piece 3 at 15-MAY-2014 05:17:55
channel ORA_DISK_4: starting full datafile backup set
channel ORA_DISK_4: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 38401 through 51200
channel ORA_DISK_4: starting piece 4 at 15-MAY-2014 05:17:56
channel ORA_DISK_5: starting full datafile backup set
channel ORA_DISK_5: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 51201 through 64000
channel ORA_DISK_5: starting piece 5 at 15-MAY-2014 05:17:56
channel ORA_DISK_1: finished piece 1 at 15-MAY-2014 05:18:12
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.286.847603077 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:21
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/cvrman/datafile/sysaux.257.847354793
backing up blocks 64001 through 67840
channel ORA_DISK_1: starting piece 6 at 15-MAY-2014 05:18:28
channel ORA_DISK_2: finished piece 2 at 15-MAY-2014 05:18:28
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.272.847603087 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_2: backup set complete, elapsed time: 00:00:33
channel ORA_DISK_4: finished piece 4 at 15-MAY-2014 05:18:29
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.296.847603087 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_4: backup set complete, elapsed time: 00:00:33
channel ORA_DISK_5: finished piece 5 at 15-MAY-2014 05:18:29
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.315.847603099 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_5: backup set complete, elapsed time: 00:00:33
channel ORA_DISK_1: finished piece 6 at 15-MAY-2014 05:18:36
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.288.847603115 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:08
channel ORA_DISK_3: finished piece 3 at 15-MAY-2014 05:18:36
piece handle=+DATA/cvrman/backupset/2014_05_15/nnndf0_fast_backup_0.316.847603107 tag=FAST_BACKUP comment=NONE
channel ORA_DISK_3: backup set complete, elapsed time: 00:00:41
Finished backup at 15-MAY-2014 05:18:36