Question which may have been asked.
For 1 time backup to migrate/clone database, KEEP backup does not affect retention policy and not backed up 1 times clause.
Imagine the consequences for deleting 1 off backup which has archivelog backup and the main scripts use not backed up 1-2 times clause which could mean no archivelog for subsequent backups.
RMAN> list archivelog all;
using target database control file instead of recovery catalog
List of Archived Log Copies for database with db_unique_name HAWKLAS
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - --------------------
5067 1 806 A 2016-JAN-21 07:45:48
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_21/o1_mf_1_806_cb1zcp8y_.arc
5068 1 807 A 2016-JAN-21 07:47:01
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_21/o1_mf_1_807_cb1zd4ns_.arc
5070 1 808 A 2016-JAN-21 07:47:16
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_22/o1_mf_1_808_cb4tyo1y_.arc
5071 1 809 A 2016-JAN-22 09:50:11
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_22/o1_mf_1_809_cb4tytsp_.arc
5073 1 810 A 2016-JAN-22 09:50:18
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_26/o1_mf_1_810_cbh5st68_.arc
5072 1 811 A 2016-JAN-26 07:56:40
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_26/o1_mf_1_811_cbh5sz08_.arc
5074 1 812 A 2016-JAN-26 07:56:45
Name: /oradata/fra/HAWKLAS/archivelog/2016_01_26/o1_mf_1_812_cbh7mc9h_.arc
RMAN> backup archivelog sequence 806 KEEP UNTIL TIME 'ADD_MONTHS(SYSDATE,1)' tag ARC_KEEP
2> ;
Starting backup at 2016-JAN-26 17:19:57
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=148 device type=DISK
backup will be obsolete on date 2016-FEB-26 17:19:57
archived logs required to recover from this backup will be backed up
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=806 RECID=5067 STAMP=901698422
channel ORA_DISK_1: starting piece 1 at 2016-JAN-26 17:19:58
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/26/2016 17:19:59
ORA-19811: cannot have files in DB_RECOVERY_FILE_DEST with keep attributes
RMAN> backup archivelog sequence 806 format '/tmp/U%' KEEP UNTIL TIME 'ADD_MONTHS(SYSDATE,1)' tag ARC_KEEP;
Starting backup at 2016-JAN-26 17:20:26
using channel ORA_DISK_1
backup will be obsolete on date 2016-FEB-26 17:20:26
archived logs required to recover from this backup will be backed up
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=806 RECID=5067 STAMP=901698422
channel ORA_DISK_1: starting piece 1 at 2016-JAN-26 17:20:26
channel ORA_DISK_1: finished piece 1 at 2016-JAN-26 17:20:27
piece handle=/tmp/U% tag=ARC_KEEP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 2016-JAN-26 17:20:27
RMAN> backup archivelog sequence 806 not backed up 1 times tag ARC_BKUP;
Starting backup at 2016-JAN-26 17:21:02
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=806 RECID=5067 STAMP=901698422
channel ORA_DISK_1: starting piece 1 at 2016-JAN-26 17:21:02
channel ORA_DISK_1: finished piece 1 at 2016-JAN-26 17:21:03
piece handle=/oradata/fra/HAWKLAS/backupset/2016_01_26/o1_mf_annnn_ARC_BKUP_cbj6vyl7_.bkp tag=ARC_BKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 2016-JAN-26 17:21:03
Starting Control File and SPFILE Autobackup at 2016-JAN-26 17:21:04
piece handle=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/HAWK_c-3130551611-20160126-02 comment=NONE
Finished Control File and SPFILE Autobackup at 2016-JAN-26 17:21:07
RMAN> backup archivelog sequence 807 tag ARC_BACKUP;
Starting backup at 2016-JAN-26 17:21:30
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=807 RECID=5068 STAMP=901698436
channel ORA_DISK_1: starting piece 1 at 2016-JAN-26 17:21:30
channel ORA_DISK_1: finished piece 1 at 2016-JAN-26 17:21:31
piece handle=/oradata/fra/HAWKLAS/backupset/2016_01_26/o1_mf_annnn_ARC_BACKUP_cbj6wt9y_.bkp tag=ARC_BACKUP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 2016-JAN-26 17:21:31
Starting Control File and SPFILE Autobackup at 2016-JAN-26 17:21:31
piece handle=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/HAWK_c-3130551611-20160126-03 comment=NONE
Finished Control File and SPFILE Autobackup at 2016-JAN-26 17:21:34
RMAN> backup archivelog sequence 807 not backed up 1 times;
Starting backup at 2016-JAN-26 17:21:43
using channel ORA_DISK_1
skipping archived log of thread 1 with sequence 807; already backed up
Finished backup at 2016-JAN-26 17:21:43
RMAN> list backup of archivelog all summary;
List of Backups
===============
Key TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
------- -- -- - ----------- -------------------- ------- ------- ---------- ---
1360 B A A DISK 2016-JAN-26 17:20:27 1 1 NO ARC_KEEP
1361 B A A DISK 2016-JAN-26 17:21:02 1 1 NO ARC_BKUP
1363 B A A DISK 2016-JAN-26 17:21:30 1 1 NO ARC_BACKUP
RMAN> list backup of archivelog sequence 806;
List of Backup Sets
===================
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ --------------------
1360 27.00K DISK 00:00:01 2016-JAN-26 17:20:27
BP Key: 1505 Status: AVAILABLE Compressed: NO Tag: ARC_KEEP
Piece Name: /tmp/U%
List of Archived Logs in backup set 1360
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- -------------------- ---------- ---------
1 806 6645495 2016-JAN-21 07:45:48 6645595 2016-JAN-21 07:47:01
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ --------------------
1361 27.00K DISK 00:00:00 2016-JAN-26 17:21:02
BP Key: 1506 Status: AVAILABLE Compressed: NO Tag: ARC_BKUP
Piece Name: /oradata/fra/HAWKLAS/backupset/2016_01_26/o1_mf_annnn_ARC_BKUP_cbj6vyl7_.bkp
List of Archived Logs in backup set 1361
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- -------------------- ---------- ---------
1 806 6645495 2016-JAN-21 07:45:48 6645595 2016-JAN-21 07:47:01
RMAN> list backup of archivelog sequence 806 summary;
List of Backups
===============
Key TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
------- -- -- - ----------- -------------------- ------- ------- ---------- ---
1360 B A A DISK 2016-JAN-26 17:20:27 1 1 NO ARC_KEEP
1361 B A A DISK 2016-JAN-26 17:21:02 1 1 NO ARC_BKUP
RMAN>
OOPS! Did you see my errors?
