RMAN is the best tool to perform the backups of our databases, we can perform backups of our database, tablespaces , even datafiles and there are several functions to use in order to perform the backup according to our needs. In my previous articles I have explained some of those functions and methods to perform backups, you can read more in the following articles:
- Spreading RMAN Backups Across Multiple Disks
- Oracle Database 12c: Una introducción a los conceptos de Respaldo, Recuperación y Recuperación a un punto en el tiempo (PITR) de PDBs
- Mixing Cumulative and Differential Backups with RMAN
- Triplexing RMAN Backups
- 3 RMAN parameters every DBA should know
- Deleting Applied-on-Standby Archivelogs
- Validating The Backup before using
And in This article I will write about another feature called "Multi Section". Multi Section is a feature that can be used to backup faster very large data files. When we are using Multi Section, a big data file is broken up into sections, every section is backed up by a Channel in a different Backup Set in Parallel (or serially) , this definitely speeds up the backups for such large data files. For example in the following image, We have 5 Channels to Backup the large File, since the Image shows only 5 sections this means that the datafile size is divided into 5, let's say the datafile has 1,000 MB, this means that if we want to have only 5 Sections we have to Specify 200 MBs as the "Section Size". If we Specify a Smaller Section Size, that's ok, we will have more Backup Sets created.
Let's see how it works through some examples. We will see the following examples:
- Multi Section Backup with Parallelism
- Multi Section Backup Serially
- Multi Section Incremental L0 Backup
- Multi Section Incremental L1 Backup
Firstable , I will create a big tablespace using a large data file.
SQL> create bigfile tablespace TheBigFile datafile '+DATA' size 5G autoextend off;
Tablespace created.
After to create the big tablespace, I created a table and I inserted data in order to fill up that tablespace.
NOTE: Be aware that this article was written using 11.2.0.4.
Now we are able to perform our examples.
Multi Section Backup with Parallelism
In this example we will use 5 Channels to backup the tablespace "TheBigFile" in Parallel, every Channel will be performing a Backup Set in Parallel, every backup piece will have approximately 500M since this is the size for every "Section".
RMAN>
run{
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
allocate channel c4 type disk;
allocate channel c5 type disk;
Backup Section Size 500M tablespace TheBigFile format '/home/oracle/Backups/%U';
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
}
using target database control file instead of recovery catalog
allocated channel: c1
channel c1: SID=50 device type=DISK
allocated channel: c2
channel c2: SID=23 device type=DISK
allocated channel: c3
channel c3: SID=47 device type=DISK
allocated channel: c4
channel c4: SID=44 device type=DISK
allocated channel: c5
channel c5: SID=49 device type=DISK
Starting backup at 07-25-2016 09:29:16
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 1 through 64000
channel c1: starting piece 1 at 07-25-2016 09:29:16
channel c2: starting full datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 64001 through 128000
channel c2: starting piece 2 at 07-25-2016 09:29:17
channel c3: starting full datafile backup set
channel c3: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 128001 through 192000
channel c3: starting piece 3 at 07-25-2016 09:29:17
channel c4: starting full datafile backup set
channel c4: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 192001 through 256000
channel c4: starting piece 4 at 07-25-2016 09:29:18
channel c5: starting full datafile backup set
channel c5: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 256001 through 320000
channel c5: starting piece 5 at 07-25-2016 09:29:20
channel c1: finished piece 1 at 07-25-2016 09:29:20
piece handle=/home/oracle/Backups/0nrbiq3c_1_1 tag=TAG20160725T092916 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:04
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 320001 through 384000
channel c1: starting piece 6 at 07-25-2016 09:29:21
channel c2: finished piece 2 at 07-25-2016 09:29:22
piece handle=/home/oracle/Backups/0nrbiq3c_2_1 tag=TAG20160725T092916 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:05
channel c2: starting full datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 384001 through 448000
channel c2: starting piece 7 at 07-25-2016 09:29:23
channel c1: finished piece 6 at 07-25-2016 09:29:38
piece handle=/home/oracle/Backups/0nrbiq3c_6_1 tag=TAG20160725T092916 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:17
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 448001 through 512000
channel c1: starting piece 8 at 07-25-2016 09:29:38
channel c2: finished piece 7 at 07-25-2016 09:29:38
piece handle=/home/oracle/Backups/0nrbiq3c_7_1 tag=TAG20160725T092916 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:15
channel c2: starting full datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 512001 through 576000
channel c2: starting piece 9 at 07-25-2016 09:29:38
channel c3: finished piece 3 at 07-25-2016 09:29:38
piece handle=/home/oracle/Backups/0nrbiq3c_3_1 tag=TAG20160725T092916 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:21
channel c3: starting full datafile backup set
channel c3: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 576001 through 640000
channel c3: starting piece 10 at 07-25-2016 09:29:39
channel c4: finished piece 4 at 07-25-2016 09:29:39
piece handle=/home/oracle/Backups/0nrbiq3c_4_1 tag=TAG20160725T092916 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:21
channel c4: starting full datafile backup set
channel c4: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 640001 through 655360
channel c4: starting piece 11 at 07-25-2016 09:29:39
channel c5: finished piece 5 at 07-25-2016 09:29:39
piece handle=/home/oracle/Backups/0nrbiq3c_5_1 tag=TAG20160725T092916 comment=NONE
channel c5: backup set complete, elapsed time: 00:00:19
channel c4: finished piece 11 at 07-25-2016 09:29:42
piece handle=/home/oracle/Backups/0nrbiq3c_11_1 tag=TAG20160725T092916 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:03
channel c1: finished piece 8 at 07-25-2016 09:29:46
piece handle=/home/oracle/Backups/0nrbiq3c_8_1 tag=TAG20160725T092916 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:08
channel c2: finished piece 9 at 07-25-2016 09:29:46
piece handle=/home/oracle/Backups/0nrbiq3c_9_1 tag=TAG20160725T092916 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:08
channel c3: finished piece 10 at 07-25-2016 09:29:46
piece handle=/home/oracle/Backups/0nrbiq3c_10_1 tag=TAG20160725T092916 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:07
Finished backup at 07-25-2016 09:29:46
released channel: c1
released channel: c2
released channel: c3
released channel: c4
released channel: c5
Now let's see the Backup Pieces that were created by the Backup, we will see that every Backup Piece has around 500 MBs this is because every Backup Section was specified with 500M,
[oracle@a1 Backups]$ du -sh *
427M 0nrbiq3c_10_1
500M 0nrbiq3c_1_1
60K 0nrbiq3c_11_1
501M 0nrbiq3c_2_1
501M 0nrbiq3c_3_1
501M 0nrbiq3c_4_1
501M 0nrbiq3c_5_1
501M 0nrbiq3c_6_1
501M 0nrbiq3c_7_1
501M 0nrbiq3c_8_1
501M 0nrbiq3c_9_1
[oracle@a1 Backups]$
As you can see, every Backup Piece has around 500M, this is because the "Section Size" was set to 500M.
Multi Section Backup Serially
When we use Multi Section Feature of RMAN, not always we have to use Parallelism, in case we want to do it serially, we also can do it by using 1 Channel as I show you in the following example:
RMAN>
run{
allocate channel c1 type disk; -- Using only one channel will use Multi Section serially.
Backup Section Size 500M tablespace TheBigFile format '/home/oracle/Backups/%U';
release channel c1;
}
RMAN> 2> 3> 4> 5>
allocated channel: c1
channel c1: SID=32 device type=DISK
Starting backup at 07-25-2016 11:17:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 1 through 64000
channel c1: starting piece 1 at 07-25-2016 11:17:03
channel c1: finished piece 1 at 07-25-2016 11:17:06
piece handle=/home/oracle/Backups/1frbj0df_1_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 64001 through 128000
channel c1: starting piece 2 at 07-25-2016 11:17:06
channel c1: finished piece 2 at 07-25-2016 11:17:09
piece handle=/home/oracle/Backups/1frbj0df_2_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 128001 through 192000
channel c1: starting piece 3 at 07-25-2016 11:17:10
channel c1: finished piece 3 at 07-25-2016 11:17:13
piece handle=/home/oracle/Backups/1frbj0df_3_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 192001 through 256000
channel c1: starting piece 4 at 07-25-2016 11:17:13
channel c1: finished piece 4 at 07-25-2016 11:17:16
piece handle=/home/oracle/Backups/1frbj0df_4_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 256001 through 320000
channel c1: starting piece 5 at 07-25-2016 11:17:16
channel c1: finished piece 5 at 07-25-2016 11:17:19
piece handle=/home/oracle/Backups/1frbj0df_5_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 320001 through 384000
channel c1: starting piece 6 at 07-25-2016 11:17:19
channel c1: finished piece 6 at 07-25-2016 11:17:22
piece handle=/home/oracle/Backups/1frbj0df_6_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 384001 through 448000
channel c1: starting piece 7 at 07-25-2016 11:17:22
channel c1: finished piece 7 at 07-25-2016 11:17:25
piece handle=/home/oracle/Backups/1frbj0df_7_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 448001 through 512000
channel c1: starting piece 8 at 07-25-2016 11:17:25
channel c1: finished piece 8 at 07-25-2016 11:17:28
piece handle=/home/oracle/Backups/1frbj0df_8_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 512001 through 576000
channel c1: starting piece 9 at 07-25-2016 11:17:28
channel c1: finished piece 9 at 07-25-2016 11:17:31
piece handle=/home/oracle/Backups/1frbj0df_9_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 576001 through 640000
channel c1: starting piece 10 at 07-25-2016 11:17:31
channel c1: finished piece 10 at 07-25-2016 11:17:34
piece handle=/home/oracle/Backups/1frbj0df_10_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00011 name=+DATA/orcl/datafile/thebigfile.276.918117061
backing up blocks 640001 through 655360
channel c1: starting piece 11 at 07-25-2016 11:17:35
channel c1: finished piece 11 at 07-25-2016 11:17:36
piece handle=/home/oracle/Backups/1frbj0df_11_1 tag=TAG20160725T111703 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:01
Finished backup at 07-25-2016 11:17:36
released channel: c1
RMAN>
Multi Section Incremental L0 Backup
There are some people saying that we cannot use Multi Section with Incremental Backup, this is a myth that we have to clear. In fact, we can use Multi Section Backups even if the backup is Incremental L0 as we will see in this example. What we cannot use is Incremental L0 using Image Copy plus using Multi Section (Image Copy + Multisection=Not implemented in 11g). However, we can use Multi Section in 11g when we are using Backup Sets even if it is Incremental L0 as below:
run{
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
allocate channel c4 type disk;
allocate channel c5 type disk;
Backup Incremental Level 0 Section Size 500M database format '/home/oracle/Backups/%U';
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
}
released channel: ORA_DISK_1
released channel: ORA_DISK_2
released channel: ORA_DISK_3
released channel: ORA_DISK_4
released channel: ORA_DISK_5
allocated channel: c1
channel c1: SID=52 device type=DISK
allocated channel: c2
channel c2: SID=49 device type=DISK
allocated channel: c3
channel c3: SID=56 device type=DISK
allocated channel: c4
channel c4: SID=50 device type=DISK
allocated channel: c5
channel c5: SID=47 device type=DISK
Starting backup at 07-25-2016 11:54:28
channel c1: starting incremental level 0 datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00001 name=+DATA/orcl/datafile/system.262.912909191
backing up blocks 1 through 64000
channel c1: starting piece 1 at 07-25-2016 11:54:29
channel c2: starting incremental level 0 datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/orcl/datafile/sysaux.257.912909191
backing up blocks 1 through 64000
channel c2: starting piece 1 at 07-25-2016 11:54:29
channel c3: starting incremental level 0 datafile backup set
channel c3: specifying datafile(s) in backup set
input datafile file number=00009 name=+DATA/orcl/datafile/tbs1.279.918100673
channel c3: starting piece 1 at 07-25-2016 11:54:29
channel c4: starting incremental level 0 datafile backup set
channel c4: specifying datafile(s) in backup set
input datafile file number=00010 name=+DATA/orcl/datafile/tbs2.256.918102673
channel c4: starting piece 1 at 07-25-2016 11:54:29
channel c5: starting incremental level 0 datafile backup set
channel c5: specifying datafile(s) in backup set
input datafile file number=00003 name=+DATA/orcl/datafile/undotbs1.261.912909191
input datafile file number=00004 name=+DATA/orcl/datafile/users.271.912909191
channel c5: starting piece 1 at 07-25-2016 11:54:29
channel c3: finished piece 1 at 07-25-2016 11:54:29
piece handle=/home/oracle/Backups/46rbj2jl_1_1 tag=TAG20160725T115428 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:00
channel c3: starting incremental level 0 datafile backup set
channel c3: specifying datafile(s) in backup set
input datafile file number=00001 name=+DATA/orcl/datafile/system.262.912909191
backing up blocks 64001 through 94720
channel c3: starting piece 2 at 07-25-2016 11:54:30
channel c4: finished piece 1 at 07-25-2016 11:54:30
piece handle=/home/oracle/Backups/47rbj2jl_1_1 tag=TAG20160725T115428 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:01
channel c4: starting incremental level 0 datafile backup set
channel c4: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/orcl/datafile/sysaux.257.912909191
backing up blocks 64001 through 67840
channel c4: starting piece 2 at 07-25-2016 11:54:31
channel c5: finished piece 1 at 07-25-2016 11:54:31
piece handle=/home/oracle/Backups/48rbj2jl_1_1 tag=TAG20160725T115428 comment=NONE
channel c5: backup set complete, elapsed time: 00:00:02
channel c5: starting incremental level 0 datafile backup set
channel c5: specifying datafile(s) in backup set
channel c4: finished piece 2 at 07-25-2016 11:54:34
piece handle=/home/oracle/Backups/45rbj2jl_2_1 tag=TAG20160725T115428 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:03
channel c4: starting incremental level 0 datafile backup set
channel c4: specifying datafile(s) in backup set
including current SPFILE in backup set
channel c4: starting piece 1 at 07-25-2016 11:54:35
including current control file in backup set
channel c5: starting piece 1 at 07-25-2016 11:54:35
channel c3: finished piece 2 at 07-25-2016 11:54:35
piece handle=/home/oracle/Backups/44rbj2jl_2_1 tag=TAG20160725T115428 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:05
channel c1: finished piece 1 at 07-25-2016 11:54:36
piece handle=/home/oracle/Backups/44rbj2jl_1_1 tag=TAG20160725T115428 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:07
channel c2: finished piece 1 at 07-25-2016 11:54:36
piece handle=/home/oracle/Backups/45rbj2jl_1_1 tag=TAG20160725T115428 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:07
channel c4: finished piece 1 at 07-25-2016 11:54:36
piece handle=/home/oracle/Backups/4crbj2jr_1_1 tag=TAG20160725T115428 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:01
channel c5: finished piece 1 at 07-25-2016 11:54:36
piece handle=/home/oracle/Backups/4brbj2jn_1_1 tag=TAG20160725T115428 comment=NONE
channel c5: backup set complete, elapsed time: 00:00:01
Finished backup at 07-25-2016 11:54:36
released channel: c1
released channel: c2
released channel: c3
released channel: c4
released channel: c5
[oracle@a1 Backups]$ du -sh *
434M 44rbj2jl_1_1
200M 44rbj2jl_2_1
395M 45rbj2jl_1_1
1.5M 45rbj2jl_2_1
1.2M 46rbj2jl_1_1
1.1M 47rbj2jl_1_1
3.8M 48rbj2jl_1_1
9.7M 4brbj2jn_1_1
100K 4crbj2jr_1_1
[oracle@a1 Backups]$
Multi Section Incremental L1 Backup
Even I saw some articles saying that we can use Multi Section with Incremental L0 Backups but not with Incremental L1 Backups, this is not true as well, we in fact can use Incremental Level 1 and also Multi Section in 11g as I show you bellow. Again, as long as we are using Backup Sets.
run{
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
allocate channel c4 type disk;
allocate channel c5 type disk;
Backup Incremental Level 1 cumulative Section Size 500M database format '/home/oracle/Backups/%U';
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
}
using target database control file instead of recovery catalog
allocated channel: c1
channel c1: SID=56 device type=DISK
allocated channel: c2
channel c2: SID=49 device type=DISK
allocated channel: c3
channel c3: SID=52 device type=DISK
allocated channel: c4
channel c4: SID=32 device type=DISK
allocated channel: c5
channel c5: SID=37 device type=DISK
Starting backup at 07-25-2016 11:55:29
channel c1: starting incremental level 1 datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00001 name=+DATA/orcl/datafile/system.262.912909191
input datafile file number=00004 name=+DATA/orcl/datafile/users.271.912909191
channel c1: starting piece 1 at 07-25-2016 11:55:29
channel c2: starting incremental level 1 datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA/orcl/datafile/sysaux.257.912909191
input datafile file number=00003 name=+DATA/orcl/datafile/undotbs1.261.912909191
channel c2: starting piece 1 at 07-25-2016 11:55:30
channel c3: starting incremental level 1 datafile backup set
channel c3: specifying datafile(s) in backup set
input datafile file number=00009 name=+DATA/orcl/datafile/tbs1.279.918100673
input datafile file number=00010 name=+DATA/orcl/datafile/tbs2.256.918102673
channel c3: starting piece 1 at 07-25-2016 11:55:30
channel c4: starting incremental level 1 datafile backup set
channel c4: specifying datafile(s) in backup set
channel c5: starting incremental level 1 datafile backup set
channel c5: specifying datafile(s) in backup set
including current SPFILE in backup set
channel c5: starting piece 1 at 07-25-2016 11:55:30
channel c1: finished piece 1 at 07-25-2016 11:55:33
piece handle=/home/oracle/Backups/4drbj2lh_1_1 tag=TAG20160725T115529 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:04
channel c2: finished piece 1 at 07-25-2016 11:55:33
piece handle=/home/oracle/Backups/4erbj2lh_1_1 tag=TAG20160725T115529 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:03
channel c3: finished piece 1 at 07-25-2016 11:55:33
piece handle=/home/oracle/Backups/4frbj2li_1_1 tag=TAG20160725T115529 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:03
including current control file in backup set
channel c4: starting piece 1 at 07-25-2016 11:55:33
channel c5: finished piece 1 at 07-25-2016 11:55:33
piece handle=/home/oracle/Backups/4hrbj2li_1_1 tag=TAG20160725T115529 comment=NONE
channel c5: backup set complete, elapsed time: 00:00:03
channel c4: finished piece 1 at 07-25-2016 11:55:34
piece handle=/home/oracle/Backups/4grbj2li_1_1 tag=TAG20160725T115529 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:01
Finished backup at 07-25-2016 11:55:34
released channel: c1
released channel: c2
released channel: c3
released channel: c4
released channel: c5
RMAN>
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