RETENTION POLICY in RMAN question
Is a good practice to set up a RETENTION POLICY for the full backups (level 0) and another RETENTION POLICY for the incremental backups (level 1)? If yes, why and how could I do this ?
Thanks for your responses,
Christine.
It is from the doc
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1007.htm#sthref279
From the perspective of a retention policy, a datafile backup is a full or level 0 backup of an individual datafile or control file. It does not matter whether the backup is a datafile image copy, a proxy copy, or part of a backup set. For datafile copies and proxy copies, if RMAN determines that the copy or proxy copy is not needed, then the copy or proxy copy can be deleted. For datafile backups in backup sets, RMAN cannot delete the backup set until all of the individual datafile backups within the backup set are obsolete.
Besides affecting full or level 0 datafile and control file backups, the retention policy affects archived redo logs and level 1 incremental backups. First, RMAN decides which datafile and control file backups are obsolete. Then, RMAN considers as obsolete all archived logs and incremental level 1 backups that are not needed to recover the oldest datafile or control file backup that must be retained.
Similar Messages
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Control_file_record_keep_time vs retention policy
Its not thread nor question just read from documents and tried to imply the fact of documents and i think its written correct what i tried to do proof it practically ,neither i am trying to be smart just share with you guys is my observation correct or not.i am using FRA area for backup.
<quote>
Relation between RMAN retention period and control_file_record_keep_time
RMAN backup keeps the backup metadata information in the reusable section of the controlfile.Its depends on the parameter CONTROL_FILE_RECORD_KEEP_TIME. CONTROL_FILE_RECORD_KEEP_TIME specifies the minimum number of days before a reusable record in the control file can be reused.
In the event a new record needs to be added to a reusable section and there is not enough space then it will delete the oldest record, which are aged enough.
Backup retention policy is the rule to set regarding which backups must be retained (whether on disk or other backup media) to meet the recovery and other requirements.
If the CONTROL_FILE_RECORD_KEEP_TIME is less than the retention policy then it may overwrite reusable records prior to obsoleting them in the RMAN metadata. Therfor it is recommended that the CONTROL_FILE_RECORD_KEEP_TIME should set to a higher value than the retention policy.
Formula
CONTROL_FILE_RECORD_KEEP_TIME = retention period + level 0 backup interval + 1
For e.g.
e.q. level 0 backup once a week with retention policy of a recovery windows of 14 days then in this
case the CONTROL_FILE_RECORD_KEEP_TIME should be 14+7+1=22
<quote>
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 7
SQL>
SQL> alter system set control_file_record_keep_time=1
2 /
System altered.
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 1
RMAN> configure retention policy to redundancy 3
2> ;
new RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
new RMAN configuration parameters are successfully stored
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=126 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T185951_3N5T2RTX_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:17
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639169270_3N5T598C_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T190313_3N5T94SG_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:22
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639169477_3N5TCPVW_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T190500_3N5TDGC9_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:55
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639169556_3N5TG65X_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Archive Log 30 19-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_19\O1_MF_1_1_3N35QQX7_.ARC
Archive Log 31 19-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_19\O1_MF_1_2_3N39LR86_.ARC
Archive Log 32 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_3_3N4RZBXV_.ARC
Archive Log 33 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_4_3N4W8SLF_.ARC
Archive Log 34 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_5_3N4Y1CN7_.ARC
Archive Log 35 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_6_3N4Z6LGF_.ARC
Archive Log 36 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_7_3N53S4XK_.ARC
Archive Log 37 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_8_3N57XHYB_.ARC
Archive Log 38 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_9_3N5C52D8_.ARC
Archive Log 39 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_10_3N5C83YB_.ARC
Archive Log 40 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_11_3N5K9J2Z_.ARC
Archive Log 41 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_12_3N5MMXHO_.ARC
Archive Log 42 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_13_3N5N566W_.ARC
Archive Log 43 20-NOV-07 C:\ORACLE\FLASH_RECOVERY_AREA\ORC
\ORC\ARCHIVELOG\2007_11_20\O1_MF_1_14_3N5RVB4G_.ARC
RMAN>
Now i just delete alls backup and increase the control_file_record_keep_time 7 which will be more then retention policy redundancy 3
RMAN> list backup
2> ;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
6 Full 512M DISK 00:01:10 20-NOV-07
BP Key: 6 Status: AVAILABLE Compressed: NO Tag: TAG20071120T185951
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T185951_3N5T2RTX_.BKP
List of Datafiles in backup set 6
File LV Type Ckp SCN Ckp Time Name
1 Full 478504 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01
.DBF
2 Full 478504 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS0
1.DBF
3 Full 478504 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01
.DBF
4 Full 478504 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.
DBF
BS Key Type LV Size Device Type Elapsed Time Completion Time
7 Full 2M DISK 00:00:04 20-NOV-07
BP Key: 7 Status: AVAILABLE Compressed: NO Tag: TAG20071120T190110
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169270_3N5T598C_.BKP
Controlfile Included: Ckp SCN: 478975 Ckp time: 20-NOV-07
SPFILE Included: Modification time: 20-NOV-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
8 Full 513M DISK 00:01:15 20-NOV-07
BP Key: 8 Status: AVAILABLE Compressed: NO Tag: TAG20071120T190313
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T190313_3N5T94SG_.BKP
List of Datafiles in backup set 8
File LV Type Ckp SCN Ckp Time Name
1 Full 480265 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01
.DBF
2 Full 480265 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS0
1.DBF
3 Full 480265 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01
.DBF
4 Full 480265 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.
DBF
BS Key Type LV Size Device Type Elapsed Time Completion Time
9 Full 2M DISK 00:00:02 20-NOV-07
BP Key: 9 Status: AVAILABLE Compressed: NO Tag: TAG20071120T190437
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169477_3N5TCPVW_.BKP
Controlfile Included: Ckp SCN: 480346 Ckp time: 20-NOV-07
SPFILE Included: Modification time: 20-NOV-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
10 Full 513M DISK 00:00:52 20-NOV-07
BP Key: 10 Status: AVAILABLE Compressed: NO Tag: TAG20071120T190500
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T190500_3N5TDGC9_.BKP
List of Datafiles in backup set 10
File LV Type Ckp SCN Ckp Time Name
1 Full 480415 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01
.DBF
2 Full 480415 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS0
1.DBF
3 Full 480415 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01
.DBF
4 Full 480415 20-NOV-07 C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.
DBF
BS Key Type LV Size Device Type Elapsed Time Completion Time
11 Full 2M DISK 00:00:02 20-NOV-07
BP Key: 11 Status: AVAILABLE Compressed: NO Tag: TAG20071120T190556
Piece Name: C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169556_3N5TG65X_.BKP
Controlfile Included: Ckp SCN: 480449 Ckp time: 20-NOV-07
SPFILE Included: Modification time: 20-NOV-07
RMAN> delete backup
2> ;
using channel ORA_DISK_1
List of Backup Pieces
BP Key BS Key Pc# Cp# Status Device Type Piece Name
6 6 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\BACKUPSET\2007_11_20\O1_MF_NNNDF_TAG20071120T185951_3N5T2RTX_.BKP
7 7 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\AUTOBACKUP\2007_11_20\O1_MF_S_639169270_3N5T598C_.BKP
8 8 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\BACKUPSET\2007_11_20\O1_MF_NNNDF_TAG20071120T190313_3N5T94SG_.BKP
9 9 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\AUTOBACKUP\2007_11_20\O1_MF_S_639169477_3N5TCPVW_.BKP
10 10 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\BACKUPSET\2007_11_20\O1_MF_NNNDF_TAG20071120T190500_3N5TDGC9_.BKP
11 11 1 1 AVAILABLE DISK C:\ORACLE\FLASH_RECOVERY_AREA\OR
C\ORC\AUTOBACKUP\2007_11_20\O1_MF_S_639169556_3N5TG65X_.BKP
Do you really want to delete the above objects (enter YES or NO)? yes
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T185951_3N5T2RTX_.BKP recid=6 stamp=639169192
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169270_3N5T598C_.BKP recid=7 stamp=639169273
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T190313_3N5T94SG_.BKP recid=8 stamp=639169396
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169477_3N5TCPVW_.BKP recid=9 stamp=639169478
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O
1_MF_NNNDF_TAG20071120T190500_3N5TDGC9_.BKP recid=10 stamp=639169502
deleted backup piece
backup piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\
O1_MF_S_639169556_3N5TG65X_.BKP recid=11 stamp=639169558
Deleted 6 objects
RMAN> delete archivelog all
2> ;
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=126 devtype=DISK
specification does not match any archive log in the recovery catalog
RMAN> list backup
2> ;
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 1
SQL> alter system set control_file_record_keep_time=7
2 /
System altered.
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 7
SQL>
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T191412_3N5TXRSG_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:15
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639170131_3N5V03YT_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T191655_3N5V2S20_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639170261_3N5V462Z_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 20-NOV-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE10G\ORACLE\ORADATA\ORC\ORC\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 20-NOV-07
channel ORA_DISK_1: finished piece 1 at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\BACKUPSET\2007_11_20\O1_MF_NN
NDF_TAG20071120T191836_3N5V5X20_.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45
Finished backup at 20-NOV-07
Starting Control File and SPFILE Autobackup at 20-NOV-07
piece handle=C:\ORACLE\FLASH_RECOVERY_AREA\ORC\ORC\AUTOBACKUP\2007_11_20\O1_MF_S
_639170362_3N5V7C1K_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 20-NOV-07
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 3
no obsolete backups foundnothing obsolete it means control_file_record_keep_time will not affect backups unless it will be less then or equal
to retention policy.
Note : Please agree or disagree with me may be i would be wrong
KhurramSorry for alls readers after a long practical observation at my own database server i came across that my observation was wrong and absurd in this first post, the above observation is not due to control_file_record_keep_time ,its due to something obvious which i am going to share you guys here.
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups found
RMAN> list backup
2> ;
RMAN>AS documentation says
"Besides affecting datafile and control file backups, the retention policy affects archived logs and archived log backups.
First, RMAN decides which datafile and control file backups are obsolete. Then, RMAN considers as obsolete all archived
log backups that are older than the oldest datafile or control file backup that must be retained."
Now i connect to SQL and create two big table for filling the redo log file and then get it archived.Please
consider it here that i am getting archived before any taking backup i.e backup database in order to make
archive older then the oldest datafile.
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 7
SQL> create table a1 as select * from all_objects
2 /
Table created.
SQL> create table a2 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
03/17/2008 03:44 PM <DIR> .
03/17/2008 03:44 PM <DIR> ..
03/17/2008 03:44 PM 9,750,528 O1_MF_1_15_3XWLVK6T_.ARC
1 File(s) 9,750,528 bytes
2 Dir(s) 62,714,875,904 bytes free
Now i take backup
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARCYou can see the obsolete archived files which is the older then the oldest file which has been obsolete.It also
does'nt make sense to keep the archived log files which is older then the oldest file cause it will no longer
be useful for recovery process.
now back to pavillion
RMAN> delete obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archive log
archive log filename=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL\ARCHIVELO
G\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC recid=402 stamp=649611842
Deleted 1 objects
RMAN> delete backup
2> ;
using channel ORA_DISK_1
RMAN> list backup
2> ;
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 03:59 PM <DIR> .
03/17/2008 03:59 PM <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 62,724,440,064 bytes freenow this time what i did i created the archived log files after first backup in order to not to make it older
then the oldest datafile backup.
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundnow i come to at SQL and make redo log file filled by creating 2 big tables in order to get it archived
SQL> create table a3 as select * from all_objects
2 /
Table created.
SQL> create table a4 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 04:09 PM <DIR> .
03/17/2008 04:09 PM <DIR> ..
03/17/2008 04:09 PM 9,751,552 O1_MF_1_16_3XWNCGRS_.ARC
1 File(s) 9,751,552 bytes
2 Dir(s) 62,563,205,120 bytes free
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
channel ORA_DISK_1: starting compressed full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundYou can see no archived logs get obsolete yet cause the archivelog O1_MF_1_16_3XWNCGRS_.ARC
is not older then oldest datafile backup.
But this archivelog file will get obsolete if its beyond the retention policy,lest see how ,just take one more
backup ,as i have already taken two time backup and the moment i go to take third backup it will cross ours
retetnion policy from the period of 2.
RMAN> backup database
2> ;
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Backup Set 240 17-MAR-08
Backup Piece 231 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NNNDF_TAG20080317T160604_3XWN4WTB_.B
KP
Backup Set 241 17-MAR-08
Backup Piece 232 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NCSNF_TAG20080317T160604_3XWN6Z95_.B
KP
Archive Log 403 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_16_3XWNCGRS_.ARCKhurram -
Retention policy and deletion of archived files
hello, I 'am a novice DBA having a backup question.
Our retention policy is set to 14 days; weekly we have full database backup; daily we have an incremental backup.
See scripts below.
The drive "\\is003s012\rhea\rman" where the backup files reside has files older than 2 months.
I expected these files to be deleted already by rman.
I can't find the cause why these files are not removed.
The database backup jobs are running fine ; logs file do not contain any errors and once and a while you see that rman removes obsolete files.
list expired / report obsolete do not return any files.
thanks for the assistance
chris
================= full db
c$rman_script="backup incremental level 0 cumulative device type disk tag '%TAG' database;
backup device type disk tag '%TAG' archivelog all not backed up delete all input;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;
&br_save_agent_env();
&br_prebackup($l_db_connect_string, $l_is_cold_backup, $l_use_rcvcat, $l_db_10_or_higher, $l_backup_strategy, "TRUE");
my $result = &br_backup();
exit($result);
================ incr db
$rman_script="backup incremental level 1 cumulative device type disk tag '%TAG' database;
recover copy of database;
backup device type disk tag '%TAG' archivelog all not backed up delete all input;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;
&br_save_agent_env();
&br_prebackup($l_db_connect_string, $l_is_cold_backup, $l_use_rcvcat, $l_db_10_or_higher, $l_backup_strategy, "TRUE");
my $result = &br_backup();
exit($result);
================== rman setting
RMAN> show all;
RMAN configuration parameters for database with db_unique_name RHEA are:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '\\is003s012\rhea\rman\%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '\\is003s012\rhea\rman\%U';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO 'SBT_TAPE';
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'D:\ORACLE\PRODUCT\11.2.0\DBHOME_1\DATABASE\SNCFRHEA.ORA'; # defaultChris,
Thanks for the info; my current setting for this parameter:
SQL> show parameter CONTROL_FILE_RECORD_KEEP_TIME;
NAME TYPE VALUE
control_file_record_keep_time integer 7
I found another thread that elaborated on this: Re: CONTROL_FILE_RECORD_KEEP_TIME vs Retention Policy in RMAN
a) RMAN Retention Policy set to recovery window of 30 days means backups and archivelogs that you need to do a Point in Time Recovery to before 30 days do not get obsolete.
b) CONTROLFILE_RECORD_KEEP_TIME=7 will keep (potentially, if space pressure in the controlfile) the records of these files for only 7 days
Effect: Your old backups and archivelogs (+7 days) are no longer known by the system and will not get deleted (automatically or by delete obsolete) and your recovery area/backup location/archive destination will get filled up with old files.
Therefore set b) > a)
Based on this I changed the parameter:
alter system set CONTROL_FILE_RECORD_KEEP_TIME=35 scope=both;
Even tho the 'stale' backupsets are still invisible (still getting 'no obsolete backups found' when doing REPORT OBSOLETE), I guess that's because it will take a while (23 days?) for the CONTROL_FILE_RECORD_KEEP to catch up to the RMAN Retention Policy of 30 days)....
Barry -
Can i use the retention policy without using the Flash Recovery area?
Yes ,lets see here
RMAN>list backup summary
C:\>dir *.bus
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\
File Not Found
C:\>dir *.arc
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\
File Not Found
RMAN> crosscheck backup
2> ;
using channel ORA_DISK_1
RMAN> list backup summary
2> ;
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
RMAN> run {
2> allocate channel ch0 type disk;
3> backup as compressed backupset database format
4> 'c:\rman_%s_%d_%T.bus'
5> plus archivelog format 'c:\arch_%s_%d_%T.arc';
6> release channel ch0;
7> allocate channel ch1 device type disk format 'c:\arch_%s_%d_%T.arc';
8> release channel ch1;
9> delete force noprompt obsolete;
10> allocate channel ch2 device type disk format 'c:\rman_%s_%d_%T.bus';
11> release channel ch2;
12> delete force noprompt obsolete;
13> }
released channel: ORA_DISK_1
allocated channel: ch0
channel ch0: sid=146 devtype=DISK
Starting backup at 15-APR-08
current log archived
channel ch0: starting compressed archive log backupset
channel ch0: specifying archive log(s) in backup set
input archive log thread=1 sequence=24 recid=79 stamp=652108461
input archive log thread=1 sequence=25 recid=80 stamp=652112650
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\ARCH_130_ORCL1_20080415.ARC comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:05
Finished backup at 15-APR-08
Starting backup at 15-APR-08
channel ch0: starting compressed full datafile backupset
channel ch0: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\SYSTEM01.DB
F
input datafile fno=00003 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\SYSAUX01.DB
F
input datafile fno=00004 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\USERS01.DBF
input datafile fno=00002 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\UNDOTBS01.D
BF
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\RMAN_131_ORCL1_20080415.BUS comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:45
Finished backup at 15-APR-08
Starting backup at 15-APR-08
current log archived
channel ch0: starting compressed archive log backupset
channel ch0: specifying archive log(s) in backup set
input archive log thread=1 sequence=26 recid=81 stamp=652112703
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\ARCH_132_ORCL1_20080415.ARC comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:02
Finished backup at 15-APR-08
Starting Control File and SPFILE Autobackup at 15-APR-08
piece handle=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL1\AUTOBACKUP\2008_
04_15\O1_MF_S_652112718_408X3ZVJ_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 15-APR-08
released channel: ch0
allocated channel: ch1
channel ch1: sid=146 devtype=DISK
released channel: ch1
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=146 devtype=DISK
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
Backup Set 128 15-APR-08
Backup Piece 128 15-APR-08 C:\ARCH_130_ORCL1_20080415.ARC
Archive Log 79 15-APR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL1\ARCHIVELOG\2008_04_15\O1_MF_1_24_408RYXDF_.ARC
Archive Log 80 15-APR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL1\ARCHIVELOG\2008_04_15\O1_MF_1_25_408X1SCR_.ARC
deleted backup piece
backup piece handle=C:\ARCH_130_ORCL1_20080415.ARC recid=128 stamp=652112652
deleted archive log
archive log filename=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL1\ARCHIVEL
OG\2008_04_15\O1_MF_1_24_408RYXDF_.ARC recid=79 stamp=652108461
deleted archive log
archive log filename=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL1\ARCHIVEL
OG\2008_04_15\O1_MF_1_25_408X1SCR_.ARC recid=80 stamp=652112650
Deleted 3 objects
released channel: ORA_DISK_1
allocated channel: ch2
channel ch2: sid=146 devtype=DISK
released channel: ch2
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=146 devtype=DISK
no obsolete backups found
RMAN>
C:\>dir *.bus
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\
04/15/2008 02:24 PM 96,813,056 RMAN_131_ORCL1_20080415.BUS
1 File(s) 96,813,056 bytes
0 Dir(s) 61,960,724,480 bytes free
C:\>dir *.arc
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\
04/15/2008 02:25 PM 56,832 ARCH_132_ORCL1_20080415.ARC
1 File(s) 56,832 bytes
0 Dir(s) 61,960,724,480 bytes free
C:\>
RMAN> run {
2> allocate channel ch0 type disk;
3> backup as compressed backupset database format
4> 'c:\rman_%s_%d_%T.bus'
5> plus archivelog format 'c:\arch_%s_%d_%T.arc';
6> release channel ch0;
7> }
released channel: ORA_DISK_1
allocated channel: ch0
channel ch0: sid=146 devtype=DISK
Starting backup at 15-APR-08
current log archived
channel ch0: starting compressed archive log backupset
channel ch0: specifying archive log(s) in backup set
input archive log thread=1 sequence=26 recid=81 stamp=652112703
input archive log thread=1 sequence=27 recid=82 stamp=652112873
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\ARCH_134_ORCL1_20080415.ARC comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:02
Finished backup at 15-APR-08
Starting backup at 15-APR-08
channel ch0: starting compressed full datafile backupset
channel ch0: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\SYSTEM01.DB
F
input datafile fno=00003 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\SYSAUX01.DB
F
input datafile fno=00004 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\USERS01.DBF
input datafile fno=00002 name=C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL1\UNDOTBS01.D
BF
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\RMAN_135_ORCL1_20080415.BUS comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:45
Finished backup at 15-APR-08
Starting backup at 15-APR-08
current log archived
channel ch0: starting compressed archive log backupset
channel ch0: specifying archive log(s) in backup set
input archive log thread=1 sequence=28 recid=83 stamp=652112925
channel ch0: starting piece 1 at 15-APR-08
channel ch0: finished piece 1 at 15-APR-08
piece handle=C:\ARCH_136_ORCL1_20080415.ARC comment=NONE
channel ch0: backup set complete, elapsed time: 00:00:02
Finished backup at 15-APR-08
Starting Control File and SPFILE Autobackup at 15-APR-08
piece handle=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL1\AUTOBACKUP\2008_
04_15\O1_MF_S_652112928_408XBKCZ_.BKP comment=NONE
Finished Control File and SPFILE Autobackup at 15-APR-08
released channel: ch0
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Backup Set 129 15-APR-08
Backup Piece 129 15-APR-08 C:\RMAN_131_ORCL1_20080415.BUS
Backup Set 130 15-APR-08
Backup Piece 130 15-APR-08 C:\ARCH_132_ORCL1_20080415.ARC
Backup Set 131 15-APR-08
Backup Piece 131 15-APR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL1\AUTOBACKUP\2008_04_15\O1_MF_S_652112718_408X3ZVJ_.BKP
Backup Set 132 15-APR-08
Backup Piece 132 15-APR-08 C:\ARCH_134_ORCL1_20080415.ARC
Archive Log 81 15-APR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL1\ARCHIVELOG\2008_04_15\O1_MF_1_26_408X3HRP_.ARC
Archive Log 82 15-APR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL1\ARCHIVELOG\2008_04_15\O1_MF_1_27_408X8RXN_.ARC
RMAN>Note: i have archivelog which is at FRA ,it also apply there and as well yours own defined backupsets path.
Yours comments are wellcome.
http://oraware.blogspot.com/2008/04/can-i-use-retention-policy-without.htmlKhurramHmmm, I can't see where the confusion originates. The table near the bottom of www.apple.com/timecapsule/specs.html has one row labelled "For backup using Time Machine" and another row labelled "For AirPort Disk with a USB hard drive".
The requirement for backup via Time Machine is OS 10.5.1 or better. Time Machine is not supported in pre-Leopard (OS 10.5) nor in Windows.
The requirement for using Time Capsule as a remote disk is identified as "Mac with Mac OS X v10.4.8 or later" or "PC with Windows XP (SP2) or Windows Vista; Bonjour for Windows (included on Time Capsule CD)".
Doesn't that pretty much spell out that Time Capsule works as a network drive without the need for Time Machine?
Also Joe (the OP) never indicated any desire to use it with Windows so I'm not sure why all the discussion about Windows compatibility. ??
Also the quote posted by Henry seems pretty clear:
"Time Capsule with Time Machine in Leopard is the ideal backup solution. But that doesn’t mean Tiger, Windows XP, and Windows Vista users can’t enjoy the benefits of Time Capsule, too. Because it mounts as a wireless hard drive, Tiger and Windows users simply access Time Capsule directly from the wireless network for exchanging and storing files quickly and easily." -
Configuring a Retention Policy
Hi,
on 10g R2 on AIX 6.1, I want to configure retention policy for RMAN backups. I saw in documentation (http://download.oracle.com/docs/cd/B19306_01/backup.102/b14194/rcmsynta015.htm#sthref289):
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
CONFIGURE RETENTION POLICY CLEAR; Should I issue both together to have a retention of 14 days or only the first one (CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS; ) would be enough ?
Thank you.user522961 wrote:
Hi,
on 10g R2 on AIX 6.1, I want to configure retention policy for RMAN backups. I saw in documentation (http://download.oracle.com/docs/cd/B19306_01/backup.102/b14194/rcmsynta015.htm#sthref289):
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
CONFIGURE RETENTION POLICY CLEAR; Should I issue both together to have a retention of 14 days or only the first one (CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS; ) would be enough ?
Thank you.The first command only is enough. Second is actually to reset the already defined policy to it's default.
HTH
Aman.... -
Retention policy for archivelogs in the flash recovery area
I am using the flash recovery area for all my backup files (archive logs, data and control files). I want to use the redundancy retention policy because it is easy to calculate the space requirement. However, I am not clear how the retention policy applies to archive logs.
Say I set the retention policy to be "keeping 3 backups". How does it affect the archive logs? Will archive logs in the flash recovery area be deleted automatically or I need to do it manually. If they are deleted automatically just like dataset files, what is the "retention policy" for them? I do not have a tape device so all archive logs are going to be stay in disk.
Thanks.I am using the flash recovery area for all my backup
files (archive logs, data and control files). I want
to use the redundancy retention policy because it is
easy to calculate the space requirement. However, I
am not clear how the retention policy applies to
archive logs.
RMAN> show retention policy
2> ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups found
RMAN> list backup
2> ;
RMAN>AS documentation says
"Besides affecting datafile and control file backups, the retention policy affects archived logs and archived log backups.
First, RMAN decides which datafile and control file backups are obsolete. Then, RMAN considers as obsolete all archived
log backups that are older than the oldest datafile or control file backup that must be retained."
Now i connect to SQL and create two big table for filling the redo log file and then get it archived.Please
consider it here that i am getting archived before any taking backup i.e backup database in order to make
archive older then the oldest datafile.
SQL> show parameter control_file_record_keep_time
NAME TYPE VALUE
control_file_record_keep_time integer 7
SQL> create table a1 as select * from all_objects
2 /
Table created.
SQL> create table a2 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
03/17/2008 03:44 PM <DIR> .
03/17/2008 03:44 PM <DIR> ..
03/17/2008 03:44 PM 9,750,528 O1_MF_1_15_3XWLVK6T_.ARC
1 File(s) 9,750,528 bytes
2 Dir(s) 62,714,875,904 bytes free
Now i take backup
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups found
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARCYou can see the obsolete archived files which is the older then the oldest file which has been obsolete.It also
does'nt make sense to keep the archived log files which is older then the oldest file cause it will no longer
be useful for recovery process.
now back to pavillion
RMAN> delete obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
Archive Log 402 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archive log
archive log filename=C:\ORACLE\PRODUCT\10.1.0\FLASH_RECOVERY_AREA\ORCL\ARCHIVELO
G\2008_03_17\O1_MF_1_15_3XWLVK6T_.ARC recid=402 stamp=649611842
Deleted 1 objects
RMAN> delete backup
2> ;
using channel ORA_DISK_1
RMAN> list backup
2> ;
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 03:59 PM <DIR> .
03/17/2008 03:59 PM <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 62,724,440,064 bytes freenow this time what i did i created the archived log files after first backup in order to not to make it older
then the oldest datafile backup.
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundnow i come to at SQL and make redo log file filled by creating 2 big tables in order to get it archived
SQL> create table a3 as select * from all_objects
2 /
Table created.
SQL> create table a4 as select * from all_objects
2 /
Table created.
C:\>dir C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_03_17
Volume in drive C is khurram
Volume Serial Number is F49D-FF2B
Directory of C:\oracle\product\10.1.0\flash_recovery_area\ORCL\ARCHIVELOG\2008_
03_17
03/17/2008 04:09 PM <DIR> .
03/17/2008 04:09 PM <DIR> ..
03/17/2008 04:09 PM 9,751,552 O1_MF_1_16_3XWNCGRS_.ARC
1 File(s) 9,751,552 bytes
2 Dir(s) 62,563,205,120 bytes free
RMAN> backup database
2> ;
Starting backup at 17-MAR-08
using channel ORA_DISK_1
channel ORA_DISK_1: starting compressed full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
no obsolete backups foundYou can see no archived logs get obsolete yet cause the archivelog O1_MF_1_16_3XWNCGRS_.ARC
is not older then oldest datafile backup.
But this archivelog file will get obsolete if its beyond the retention policy,lest see how ,just take one more
backup ,as i have already taken two time backup and the moment i go to take third backup it will cross ours
retetnion policy from the period of 2.
RMAN> backup database
2> ;
RMAN> report obsolete
2> ;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Backup Set 240 17-MAR-08
Backup Piece 231 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NNNDF_TAG20080317T160604_3XWN4WTB_.B
KP
Backup Set 241 17-MAR-08
Backup Piece 232 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\BACKUPSET\2008_03_17\O1_MF_NCSNF_TAG20080317T160604_3XWN6Z95_.B
KP
Archive Log 403 17-MAR-08 C:\ORACLE\PRODUCT\10.1.0\FLASH_RE
COVERY_AREA\ORCL\ARCHIVELOG\2008_03_17\O1_MF_1_16_3XWNCGRS_.ARCKhurram -
RMAN Retention Policy - redundancy vs recovery window
Hi All,
I'm wondering what the most commonly used rman retention policy is, to provide point-in-time recovery. We have 2 oracle servers, one using redundancy policy (3) and the other using recovery window (2 days). I would like to standardize them but am not confident in which direction I should go in.
I'm tempted to lean towards redundancy but wanted to pose the question to a wider, experienced audience for any things to think about/watch out for. Also, I assume the restore process would the same for either.
Thanks in advance.Redundancy based retention policy means how many backups of each datafile must be retained and Recovery windows based retention policy is a period of time which starts with current time and goes backward in time upto the point of recoverability.
Oracle suggests and its Best practice is "Recovery Window" .( I don't know the reason though)
Two things you need to consider:
1) You might need more space in case of "recovery window" because it depends upon the schedule of the backup. In "redundancy" , your space consumption will be same.
2) You need to keep "recovery window" time less than the value of "control_file_Record_keep_time" so your backup records won't be overwritten in controlfile.
We use "Recovery Window" -
RMAN Backups with retention policy to redundancy 1 doesn't work fine.
Hi experts,
I have a Oracle database with the following system backups:
Monday: ArchiveLog Backup
Tuesday: Full Backup
Wednesday: ArchiveLog Backup
Thursday: ArchiveLog Backup
Friday : Full Backup
Saturday: ArchiveLog Backup
Sunday: ArchiveLog Backup
ArchiveLog Backup = backup tag 'ARCHIVELOG_BACKUP' device type disk archivelog all not backed up delete all input;
Full Backup = backup tag 'FULL_BACKUP' device type disk database skip readonly plus archivelog tag 'FULL_BACKUP_ARCHIVELOGS';
crosscheck backup;
crosscheck copy;
delete noprompt obsolete;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET PARALLELISM 8;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
What this system has done until last two weeks? For example:
Tuesday : Full Backup
Wednesday: ArchiveLog Backup
Thursday: ArchiveLog Backup
Friday : Full Backup - > After that, Full backup from Tuesday and ArchiveLog backups from Wed, and Thurs, are deleted. (Thanks to Retention policy) .
What this system do now?
Tuesday : Full Backup
Wednesday: ArchiveLog Backup
Thursday: ArchiveLog Backup
Friday : Full Backup - > After that, Full backup from Tuesday are deleted but not ArchiveLog backups from Wed, and Thurs.
When I execute a crosscheck on RMAN return that all are AVAILABLE.
My question is: What is right? The system backups before or after?
Thanks for your help!You are confused about the purpose of crosscheck.
There are two concepts for which you must grasp the distinction.
- Expired
- Obsolete
Expired
When an archive log is written, or rman makes a backup, a record of that archivelog or backupset is written to the repository in the control file.
Crosscheck simply checks the existence of the archivelogs or backupsets that are recorded in the repository. If something went missing (say, if you used an OS command to delete archivelogs), the record of the missing file is marked as 'expired'. If you follow the crosscheck command with a 'delete expired' command, the repository records that have been marked 'expired' are deleted from the repository, so rman has no more memory of those files. Note that 'expired' has nothing to do with retention policy. Also note that if you do not actually issue the 'delete expired' command, the expired records will remain in the repository.
Obsolete
The retention policy deals with when a backupset is obsolete, meaning it is no longer needed to protect the retention period. Backupset are not marked as obsolete. They are evaluated for obsolescence at the time of a command that needs it -- "report obsolete" or "delete obsolete", or when FRA maintenance requires an implied 'delete obsolete'. -
Restoring RMAN backup from tape beyond retention policy ??
Hello Friends,
I just stuck in some basic finding. Need your help to resolve the questions.
How we can use RMAN backup to restore oracle database when the RMAN backup pushed to tape already and being a OLD backup ( before retention policy date).
Just to elaborate a more.. Say my retention policy is 3 days. I want to restore from a old backup like 30 days old.
So surely the requesting backup is behind retention date and has been pushed to tape.
Please suggest.
Thanks in advance.
Regards
Sinha.dba.arnab wrote:
Hello Friends,
I just stuck in some basic finding. Need your help to resolve the questions.
How we can use RMAN backup to restore oracle database when the RMAN backup pushed to tape already and being a OLD backup ( before retention policy date).
Just to elaborate a more.. Say my retention policy is 3 days. I want to restore from a old backup like 30 days old.
So surely the requesting backup is behind retention date and has been pushed to tape.
Please suggest.
Thanks in advance.
Regards
Sinha.
Assuming the actual backup files still exist (the only thing actually deleted is the record of them in the catalog), you can make those files available and use the rman 'catalog' command to re-catalog them. -
RMAN retention policy - backup spfile and then redundancy = 5 removes it.
I have a database that is Oracle Standard Edition and it is version 9.2.0.6.
The spfile has not changed since November, 2005. A list backup does not show an spfile backup with a tag of "hot_database_spfile_backup_full". I took a close look at the RMAN script log and was shocked to discover that the spfile backup from the current day is being deleted. Is that because of the redundancy = 5? I'm trying to figure out why a backup piece from the current day is being deleted?
Examples follow.
The script deletes obsolete with redundancy = 5, however, I believe the intent was to keep 25 days because one of the configure clauses is set to a recovery window of 25 days. I realize that the redundancy overrides the configure retention policy command. I can fix the script and remove the redundancy = 5.
In the RMAN run statement, I first resync the catalog, backup the spfile, a full backup of the database including current controlfile plus archive log (delete input), resync catalog, switch logfile, and backup any additional archive logs. The backup looks fine.
Then, I allocate a channel for maintenance type sbt. The script then has a "delete noprompt expired backup;" a "delete noprompt obsolete redundancy = 5;" and finally, a crosscheck;
example of backup piece that is later deleted:
Starting backup at 07/18/2006 20:00:14
channel t1: starting full datafile backupset
channel t1: specifying datafile(s) in backupset
including current SPFILE in backupset
channel t1: starting piece 1 at 07/18/2006 20:00:14
channel t1: finished piece 1 at 07/18/2006 20:00:15
piece handle=P*****_2338_1_596145614_FULL comment=API Version 2.0,MMS Version 5.2.0.0
channel t1: backup set complete, elapsed time: 00:00:01
Finished backup at 07/18/2006 20:00:15
deletion:
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
<other lines deleted>
Backup Set 27453 07/18/2006 20:00:14
Backup Piece 27454 07/18/2006 20:00:14
P*****_2338_1_596145614_FULL
deleted backup piece
backup piece handle=P*****_2338_1_596145614_FULL recid=2039 stamp=596145614
Deleted 12 objects
Why is a backup piece created on 7/18 being deleted in the maintenance step?
Thanks in advance!In the next step in the script, the controlfile and spfile are backed up:
backup
full
skip inaccessible
tag hot_database_backup_full
format '%d_%s_%p_%t_FULL'
(Database
include current controlfile)
Plus Archivelog delete input;
Even though my backup script is redundant by backing up the spfile twice, when I list the backup of the spfile, I would have expected to find 5 backups with a tag of hot_database_spfile_backup_full and 5 with a tag of hot_database_backup_full. That is not the case. I only find spfiles with a tag of hot_database_backup_full. i am still perplexed by RMAN.
I will modify my script - remove the backup of the spfile, and crosscheck before the delete commands. I will also remove the redundancy = 5. The intent is to keep 25 days of backups.
Thanks for your comments -
Query on RMAN Retention Policy
Hi, I have my Retention policy set to Redundancy 2
I have taken 3 backups so far ( 2 Backup Sets, 1 Image Copy )
When I check report obsolete I get the following
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
Backup Set 1 05-SEP-13
Backup Piece 1 05-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_05/o1_mf_annnn_TAG20130905T100934_92jllgn1_.bkp
Backup Set 2 05-SEP-13
Backup Piece 2 05-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_05/o1_mf_nnndf_TAG20130905T100949_92jllycp_.bkp
Backup Set 3 05-SEP-13
Backup Piece 3 05-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_05/o1_mf_ncsnf_TAG20130905T100949_92jln4d5_.bkp
Backup Set 4 05-SEP-13
Backup Piece 4 05-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_05/o1_mf_annnn_TAG20130905T101030_92jln6cx_.bkp
Backup Set 5 27-SEP-13
Backup Piece 5 27-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_27/o1_mf_annnn_TAG20130927T120734_94bsqrj6_.bkp
Backup Set 7 27-SEP-13
Backup Piece 7 27-SEP-13 /home/app/oracle/fast_recovery_area/PRIMARYP/backupset/2013_09_27/o1_mf_ncsnf_TAG20130927T120751_94bssf0j_.bkp
Archive Log 305 10-OCT-13 /home/app/oracle/fast_recovery_area/PRIMARYP/archivelog/2013_10_10/o1_mf_1_138_95dv9okt_.arc
Archive Log 306 10-OCT-13 /home/app/oracle/fast_recovery_area/PRIMARYP/archivelog/2013_10_10/o1_mf_1_139_95dv9px0_.arc
Archive Log 307 10-OCT-13 /home/app/oracle/fast_recovery_area/PRIMARYP/archivelog/2013_10_10/o1_mf_1_140_95dv9r8f_.arc
Archive Log 308 10-OCT-13 /home/app/oracle/fast_recovery_area/PRIMARYP/archivelog/2013_10_10/o1_mf_1_141_95dv9sk9_.arc
Backup Set pieces 1,2,3,4 basically equate to my oldest backup - hence under redundancy of 2, I can see why that is obsolete
5 and 7 were simply Control File/SPFILE backups from Auto Backup and the 2 newer backups of these have been taken since ( i.e. backupset pieces 9 and 10 )
Q. What happens if I wanted to restore the database to the 27/09 ? What SPFILE and Control would it use ( presuming the OBSOLETE files had been removed out of the FRA ) ?
Would I have to restore the removed backup set into the FRA, Cross Check and then restore the database via RMAN to the 27/09 ?
Q. Why are some of today's ( 10/10/13 ) archive logs marked as OBSOLETE ?
Q. If I wanted to have the ability to restore the database to 2 days ago, is perhaps a Rentention Policy of a 2 day Recovery Window perhaps better than my current Redundancy=2 policy ( combined with taking a daily backup ) ?
any advice appreciated,
JimQ. What happens if I wanted to restore the database to the 27/09 ? What SPFILE and Control would it use ( presuming the OBSOLETE files had been removed out of the FRA ) ?
Would I have to restore the removed backup set into the FRA, Cross Check and then restore the database via RMAN to the 27/09 ?
- Yes you can get the database to the date which ever you want , using recover database until time.
Q. Why are some of today's ( 10/10/13 ) archive logs marked as OBSOLETE ?
- can you please provide the output of below command
RMAN> show all;
Q. If I wanted to have the ability to restore the database to 2 days ago, is perhaps a Rentention Policy of a 2 day Recovery Window perhaps better than my current Redundancy=2 policy ( combined with taking a daily backup ) ?
- You can restore the database back to two days or 5 days based on your requirement. You nee to recover the database using until time option.
Thanks,
http://gssdba.wordpress.com -
Hi,
Does following command ONLY helpful in level 1 incremental?
RMAN>CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 30 DAYS;
I want to configure to have 30 days backup must be available on tape.I also have policy anually to have tape backup and send to IRON MOUNT.
If I use following command
RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 30;
is there any diffrence?
If CROSSCHECK BACKUP shows expired and updated repository.Can we use expired backup for recovery purpose?
Thankssee this link also
How to delete expired backupset with RMAN ?
Khurram -
RMAN RETENTION POLICY configuration.
Currently I am doing RMAN backup once a day and save the copy to tapes through TSM. If I want to keep 15 copies of the db (NOT 15 same copies. It will be one copy from every day backup, so each copy will be different). How should I configure the RETENTION POLICY? Shall I do
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 15 DAYS;
Or shall I do
RMAN> CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
Also do I need to configure anything on the TSM side?
Thanks.To keep the last 15 full backups use redundancy 15.
You don't need to do anything on TSM if:
- you use RMAN to backup directly to tape device and
- you use RMAN DELETE OBSOLETE statements to purge old backups.
See http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmconfb.htm#BRADV8400 -
The RECOVERY WINDOW and REDUNDANCY options of the RETENTION POLICY parameter are mutually exclusive. I have to set one or the other. However, if I set REDUNDANCY = 3 and then RECOVERY WINDOW = 21 DAYS, I've been told that the recovery window of 21 days will be enforced and RMAN will keep only 3 backup copies within this window period? Is this correct?
Can you specify a maximum number of backups to keep within a window period of N amount of days?You can not set them both. It is one or the other.
If you set recovery window = 21 days, then it will keep as many backups as necessary to restore back to 21 days.
If you set redundany=3, then it will only keep the most recent 3 backups. -
Rman Retention policy to recovery window
Hi,
I have few basic doubts in RMAN backup policy
1 . Is that possible to set Retention policy to recovery window in minutes??
2 . If i set Backup Retention Policy to recovery window to 3 days and i am performing RMAN differential incremental backup for 4 days. Will my backups become obsolete after 3 days even though they are needed for recovery or they won't become obsolete since they are needed for recovery ???
Regards,
0071) Syntax is .... TO RECOVERY WINDOW OF integer DAYS ... no other time statement.
2) Backups become obsolete when no longer needed to fulfil a retention policy. In a (theoretical) scenario, you perform a level 0 backup and then only incremental backups, the starting level 0 backup must be kept for ever (even if it WOULD be possible to define a recovery window in minutes).
Werner
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