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'.

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Backup with retention policy to recovery window of N days

Hello,
I've issued command to create database incremental backup with configuration:
run
configure retention policy to recovery window of 14 days;
backup incremental level 1 cumulative
tag daily_incr_14_days
database
plus archivelog delete all input;
All parameters are set to their default values and database backups goes to FRA. I've got recovery catalog connected and all RC_ views at my disposal.
1) Is there any way to find out, what recovery window was used for backup from any command in rman or query from RC_ views or local database views (information from control file)?
2) If I use other recovery window setting with configure command what would rman crosscheck or report commands do?
BR
Patrycjusz.

TenakaKhan wrote:
Mahir,
thanks for answer - this means that recovery window should be used mainly for maintenance purposes (crosscheck, delete obsolete, report need backup etc.) and it's not related to actual retention period with backup pieces like 'keep until' clause for backup ... database command (this information are saved with backup as I could check in rc_backup_set view from recovery catalog)?
Yes it is.
Maintaining RMAN Backups and Repository&nbsp;Records
keepOption
backup retention policy
A user-defined policy for determining how long backups and archived logs must be retained for media recovery. You can define a retention policy in terms of backup redundancy or a recovery window.
RMAN retains the data file backups required to satisfy the current retention policy, and any archived redo logs required for complete recovery of those data file backups.
recovery window
A recovery window is one type of RMAN backup retention policy, in which the DBA specifies a period of time and RMAN ensures retention of backups and archived redo logs required for point-in-time recovery to any time during the recovery window.
The interval always ends with the current time and extends back in time for the number of days specified by the user. For example, if the retention policy is set for a recovery window of seven days, and the current time is 11:00 AM on Tuesday,
RMAN retains the backups required to allow point-in-time recovery back to 11:00 AM on the previous Tuesday.
Regards
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RMAN backup with smallest backup size

Oralce 11g2 on Redhat 5. The diskspace is our tightest resource, and we want to an incremental backup with level0 on Sunday and level 1 every week days and Saturday. I am to use the comamnds to do the job--Sunday
backup incremental level 0 tag 'level_0' database plus archivelog;
--Other days
backup incremental level 1 database plus archivelog delete all input;I do not think this is the best practice nor produce smallest backup files.
What are you comments and opinions. Thanks

Pavan, Thank you for reply. Here are the info requested
what is size of DB ??
~250GB, including UNDO and TEMP. It is a dev database and not very big. But we have total 800GB disk space. After setting some housekeeoing folders, and allow some space for data growth, it leaves 180GB for flash_recovery_area.
what would be max size of archive logs generated per day ??
Variable from less than 1 GB to 12 GB
Are you taking backups to tape or Disk ??
Disk. In the 180GB flash_recovery_area, Current backup size is 152GB. If a backup fails to delete obsolete files, the next backup will fill the flash_recovery_area.
Provide the Rman configuration information ??
RMAN> show all;
RMAN configuration parameters for database with db_unique_name TDEV2 are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 2 BACKUP TYPE TO BACKUPSET;
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 COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_tdev2.f'; # default

CONFIGURE RETENTION POLICY TO REDUNDANCY 0

Our database is 11g R2, below is our RMAN script
Presently our retention policy is 1, so 1 backup is retained along with the current backup.
I Just want to have 1 backup, i.e RMAN should take the backup and delete the old bacup.
Will it work if i change the retention policy to 0 ?
RUN
ALLOCATE CHANNEL ch1 DEVICE TYPE DISK;
ALLOCATE CHANNEL ch2 DEVICE TYPE DISK;
ALLOCATE CHANNEL ch3 DEVICE TYPE DISK;
DELETE NOPROMPT OBSOLETE;
BACKUP DATABASE INCLUDE CURRENT CONTROLFILE format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
SQL "ALTER SYSTEM ARCHIVE LOG CURRENT";
BACKUP ARCHIVELOG ALL DELETE INPUT format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
RMAN> show all
2> ;
using target database control file instead of recovery catalog
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION OFF; # defaultEdited by: user10243788 on Apr 24, 2012 1:14 AM

user10243788 wrote:
Our database is 11g R2, below is our RMAN script
Presently our retention policy is 1, so 1 backup is retained along with the current backup.
I Just want to have 1 backup, i.e RMAN should take the backup and delete the old bacup.
Will it work if i change the retention policy to 0 ?You cannot set the retention policy to redundancy 0 because redundancy count must be greater than zero.
>
RUN
ALLOCATE CHANNEL ch1 DEVICE TYPE DISK;
ALLOCATE CHANNEL ch2 DEVICE TYPE DISK;
ALLOCATE CHANNEL ch3 DEVICE TYPE DISK;
DELETE NOPROMPT OBSOLETE;
BACKUP DATABASE INCLUDE CURRENT CONTROLFILE format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
SQL "ALTER SYSTEM ARCHIVE LOG CURRENT";
BACKUP ARCHIVELOG ALL DELETE INPUT format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
}Just switch the order of operation:
use
BACKUP DATABASE INCLUDE CURRENT CONTROLFILE format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
DELETE NOPROMPT OBSOLETE;
instead of
DELETE NOPROMPT OBSOLETE;
BACKUP DATABASE INCLUDE CURRENT CONTROLFILE format 'G:\Oracle\flash_recovery_area\BACKUPSET\tmp\rman_backup\df_%d_%s_%p_%T';
You can also exclude the operation SQL "ALTER SYSTEM ARCHIVE LOG CURRENT" because BACKUP ARCHIVELOG ALL implicitly switch logfile before archiving.

ASM and CONFIGURE RETENTION POLICY TO REDUNDANCY 1

I have a 11gR2 database in Linux. ALL the database files (including ARCHIVELOGs) are in ASM. I'm configuing and using RMAN in order to backup the DB & ArchiveLogs.
I have "CONFIGURE RETENTION POLICY TO REDUNDANCY 1" configured.
Please help me understand its meaning and function within ASM.
I thought that based on that configuation that my OBSOLETE ARCHIVELOG files within ASM would be automatically be deleted?
So once I completed my second set of backups, when I executed, "DELETE NOPROMPT OBSOLETE" & "DELETE NOPROMPT EXPIRED ARCHIVELOG ALL", that the first second of ARCHIVELOG backups would be deleted?
...thanks in advance

ASM has nothing to do with retention or deletion. You can find the definition of redundancy in the docs at http://tahiti.oracle.com

RETENTION POLICY TO REDUNDANCY value

Hi,
in 10g R2 on Win 2003,
we do an incremental rman backup every night excepte sunday and every sunday a full rman backup. We want to be able to restore from last 3 weeks (I mean from 21 days before, if today is 25 of feb, to be able to restore/recover from 4 of Feb). Then what should be the value of RETENTION POLICY TO REDUNDANCY of RMAN catalog ?
Many thanks.

thank you . How about this :
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/setup005.htm#sthref261
3.5.5.1 Configuring a Recovery Window-Based Retention Policy
The RECOVERY WINDOW parameter of the CONFIGURE command specifies the number of days between the current time and the earliest point of recoverability. RMAN does not consider any full or level 0 incremental backup as obsolete if it falls within the recovery window. Additionally, RMAN retains all archived logs and level 1 incremental backups that are needed to recover to a random point within the window.
Run the CONFIGURE RETENTION POLICY command at the RMAN prompt. This example ensures that you can recover the database to any point within the last week:
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
RMAN does not automatically delete backups rendered obsolete by the recovery window. Instead, RMAN shows them as OBSOLETE in the REPORT OBSOLETE output and in the OBSOLETE column of V$BACKUP_FILES. RMAN deletes obsolete files if you run the DELETE OBSOLETE command.
3.5.5.2 Configuring a Redundancy-Based Retention Policy
The REDUNDANCY parameter of the CONFIGURE RETENTION POLICY command specifies how many backups of each datafile and control file that RMAN should keep. In other words, if the number of backups for a specific datafile or control file exceeds the REDUNDANCY setting, then RMAN considers the extra backups as obsolete. The default retention policy is REDUNDANCY=1.
As you produce more backups, RMAN keeps track of which ones to retain and which are obsolete. RMAN retains all archived logs and incremental backups that are needed to recover the nonobsolete backups.
Assume that you make a backup of datafile 7 on Monday, Tuesday, Wednesday, and Thursday. You now have four backups of the datafile. If REDUNDANCY is 2, then the Monday and Tuesday backups are obsolete. If you make another backup on Friday, then the Wednesday backup becomes obsolete.
Run the CONFIGURE RETENTION POLICY command at the RMAN prompt, as in the following example:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
3.5.5.3 Showing the Current Retention Policy
RMAN> SHOW RETENTION POLICY;
see V$RMAN_CONFIGURATION

Rman backup with standby database

Hi All,
I am looking for some suggestions for rman backup with standby database with datagaurd but no active DG. I wanted to do a rman tablespace backup. but I am stuck at sql 'alter system archive log current' in rman with standby as target. which gives following errors with or without noswitch clause
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sql statement: alter system archive log current noswitch
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of sql command on default channel at 10/05/2013 18:15:12
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Recovery Manager: Release 11.2.0.1.0
Oracle databaes Release 11.2.0.1.0 64 bit
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Secondly, do I need to cancel manged recovery while taking rman backups on standby.
I scanned thru MOS but could find solutions for rman with active DG.
Thanks in advance

726d07e6-b870-431f-8c22-a499c3ec4e0c wrote:
Hi All,
I am looking for some suggestions for rman backup with standby database with datagaurd but no active DG. I wanted to do a rman tablespace backup. but I am stuck at sql 'alter system archive log current' in rman with standby as target. which gives following errors with or without noswitch clause
RMAN> sql 'alter system archive log current noswitch';
sql statement: alter system archive log current noswitch
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of sql command on default channel at 10/05/2013 18:15:12
RMAN-11003: failure during parse/execution of SQL statement: alter system archive log current noswitch
ORA-01109: database not open
Recovery Manager: Release 11.2.0.1.0
Oracle databaes Release 11.2.0.1.0 64 bit
OS:RHEL 6 x86-64 bit
Secondly, do I need to cancel manged recovery while taking rman backups on standby.
I scanned thru MOS but could find solutions for rman with active DG.
Thanks in advance
"I scanned thru MOS but could find solutions for rman with active DG."
Howto make a consistent RMAN backup in an Standby database in Active DataGuard mode (Doc ID 1419923.1)

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