RMAN Retention Policy Dilemma
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.
Similar Messages
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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" -
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,
on 10g R2 on AIX6.1 , I have the followings :
RMAN> show all;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;My backup script :
RMAN> run
allocate channel t1 type disk;
backup as compressed backupset format '$dir/df_%d_%T_%s_%p' database;
sql 'alter system switch logfile';
backup as compressed backupset format '$dir/al_%d_%T_%s_%p' archivelog all delete input;
backup as compressed backupset format '$dir/ctl_%d_%T_%s_%p' current controlfile;
crosscheck backup;
delete noprompt obsolete;
delete noprompt expired backup of database;But I have the backup files of 3th of March yet :
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/appli/oracle/BACKUP/RMAN/FULL/MYDB/df_MYDB_20110303_179_1 recid=171 stamp=744800219And the only file it deletes is :
RMAN retention policy will be applied to the command
RMAN retention policy is set to recovery window of 14 days
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
Backup Set 13404 18-MAR-11
Backup Piece 13408 18-MAR-11 /appli/oracle/BACKUP/RMAN/INCR/MYDB/ctl_MYDB_20110318_339_1
deleted backup piece
backup piece handle=/appli/oracle/BACKUP/RMAN/INCR/MYDB/ctl_MYDB_20110318_339_1 recid=331 stamp=746072971
Deleted 1 objectsShould not RMAN delete the backup files of before 15 of March ? Why it does not ?
Thank for explanation ? Or more.Thank to all.
We backup it every night (FULL at WE and incremental in week).
list backup of database;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
7145 Full 571.86M DISK 00:01:55 03-MAR-11
BP Key: 7151 Status: AVAILABLE Compressed: YES Tag: TAG20110303T085658
Piece Name: /appli/oracle/BACKUP/RMAN/FULL/MYDB/df_MYDB_20110303_179_1
List of Datafiles in backup set 7145
File LV Type Ckp SCN Ckp Time Name
1 Full 75445711 03-MAR-11 /data01/bases/MYDB/system01.dbf
2 Full 75445711 03-MAR-11 /data01/bases/MYDB/psundots01.dbf
4 Full 75445711 03-MAR-11 /data01/bases/MYDB/psdefault.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
19112 Full 772.42M DISK 00:03:05 01-APR-11
BP Key: 19118 Status: AVAILABLE Compressed: YES Tag: TAG20110401T121403
Piece Name: /appli/oracle/BACKUP/RMAN/FULL/MYDB/df_MYDB_20110401_60_1
List of Datafiles in backup set 19112
File LV Type Ckp SCN Ckp Time Name
8 Full 152751106 01-APR-11 /data01/bases/MYDB/ptprc.dbf
10 Full 152751106 01-APR-11 /index01/bases/MYDB/pttbl.dbf
15 Full 152751106 01-APR-11 /data01/bases/MYDB/pttlrg.dbf
19 Full 152751106 01-APR-11 /data01/bases/MYDB/ptprjwk.dbf
20 Full 152751106 01-APR-11 /data01/bases/MYDB/ptaudit.dbf
24 Full 152751106 01-APR-11 /data01/bases/MYDB/amlarge.dbf
26 Full 152751106 01-APR-11 /data01/bases/MYDB/apapp.dbf
27 Full 152751106 01-APR-11 /data01/bases/MYDB/aparch.dbf
34 Full 152751106 01-APR-11 /data01/bases/MYDB/aucapp.dbf
35 Full 152751106 01-APR-11 /data01/bases/MYDB/auclrge.dbf
37 Full 152751106 01-APR-11 /data01/bases/MYDB/bdapp.dbf
38 Full 152751106 01-APR-11 /data01/bases/MYDB/bdlarge.dbf
40 Full 152751106 01-APR-11 /data01/bases/MYDB/bilarge.dbf
42 Full 152751106 01-APR-11 /data01/bases/MYDB/caapp.dbf
50 Full 152751106 01-APR-11 /data01/bases/MYDB/cuaudit.dbf
54 Full 152751106 01-APR-11 /data01/bases/MYDB/cularge.dbf
58 Full 152751106 01-APR-11 /data01/bases/MYDB/dpwork.dbf
60 Full 152751106 01-APR-11 /data01/bases/MYDB/eobfapp.dbf
64 Full 152751106 01-APR-11 /data01/bases/MYDB/eocmwrk.dbf
71 Full 152751106 01-APR-11 /data01/bases/MYDB/eoecwrk.dbf
74 Full 152751106 01-APR-11 /data01/bases/MYDB/eoepapp.dbf
75 Full 152751106 01-APR-11 /data01/bases/MYDB/eoeplrg.dbf
77 Full 152751106 01-APR-11 /data01/bases/MYDB/eoewapp.dbf
81 Full 152751106 01-APR-11 /data01/bases/MYDB/eoiulrg.dbf
84 Full 152751106 01-APR-11 /data01/bases/MYDB/eoltapp.dbf
85 Full 152751106 01-APR-11 /data01/bases/MYDB/eoppapp.dbf
88 Full 152751106 01-APR-11 /data01/bases/MYDB/eotplrg.dbf
93 Full 152751106 01-APR-11 /data01/bases/MYDB/faapp.dbf
95 Full 152751106 01-APR-11 /data01/bases/MYDB/fawork.dbf
101 Full 152751106 01-APR-11 /data01/bases/MYDB/fgwork.dbf
107 Full 152751106 01-APR-11 /data01/bases/MYDB/fowork.dbf
109 Full 152751106 01-APR-11 /data01/bases/MYDB/fsapp1.dbf
112 Full 152751106 01-APR-11 /data01/bases/MYDB/glapp.dbf
122 Full 152751106 01-APR-11 /data01/bases/MYDB/inlarge.dbf -
Hi,
I have doubt on RMAN retention policy.
we are taking daily cumulative backup and weekly Full database backup.
And our retention policy is "CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 3 DAYS"
My assumption is that RECOVERY window of 3 days will hold the backups of 3 days and delete the previous backups,since we are taking cumulative backups,and using them database can be recovered.
we used below commands to take cumulative backup.
backup incremental level 1 cumulative as COMPRESSED BACKUPSET tag '%TAG' database include current controlfile;
backup as COMPRESSED BACKUPSET tag '%TAG' archivelog all not backed up;
Regards,
mannuThanks for reply.
A recovery window is a period of time that begins with the current time and extends backward in time to the point of recoverability. The point of recoverability is the earliest time for a hypothetical point-in-time recovery, that is, the earliest point to which you can recover following a media failure. For example, if you implement a recovery window of one week, then this window of time must extend back exactly seven days from the present so that you can restore a backup and recover it to this point. You implement this retention policy as follows:
In our case:
Jan 24---Level 0 Full backup
Jan 25-Cumulative backup
Jan 26-Cumulative backup
Jan 27--->Cumulative backup
Jan-28 ----->cumulative backup
What would be my point of recoverability? How my recovery window period of 3 days work here.
Regards,
Mannu -
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 -
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 -
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 -
Appropriate RMAN Retention Policy
Hi All,
We have enabled ARCHIVELOG on a Production database, and the size allocated for the same is 4GB. There are situations when the archivelog size touches the maximum point, which results in no-connectivity to the database untill we delete old logs via RMAN.
At the moment, we have scheduled a task to delete archivelogs on a daily basis, but I agree, this is not an appropriate practice to follow.
I will really appreciate it, if someone can help me in defining a retention policy, or any other appropriate method, where we can handle this over-flow in a much better way.
Specs are as follows:
===========================================
OS: Windows Server 2003 Standard Edition
Oracle Database 10g Enterprise Edition Release 10.1.0.2.0
===========================================
Thanks
Noman Amir JamilThats nice you are moving the archivelogs to antoher partition ,i presume you had
archivelogs at the same destination where database resides isnt?
neednt to schedule turn the retetnion policy which match to yours own policy ,you just have to include delete obsolete within yours backup scripts and as i laredy given you link that
"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."
run
backup database;
backup archivelog all;
allocate channel for maintenance type disk;
delete noprompt obsolete device type disk;
release channel;
Please advise me, if my approach(logic) here is
appropriate, or is there any other way of doing this
more efficiently.it alls depend on yours SLA
i would rather suggest you move yours alls FRA area to another drive which is seperate from yours database residence.
Khurram -
RMAN Retention policy 5 days but v$backup_set shows unexpected return
ORACLE 10.2
RMAN NOCATALOG
Windows Server 2003
Hi All,
Just trying to get to grips with RMAN.
I have the Retention policy set to 5 with Auto Backup Control File.
I use a scheduled task to take a full backup every night due to small size of database.
With a 'delete noprompt obsolete' after the backup to remove old backups.
When I query the v$backup_set I get a return from a backupset from over 10 days ago? (this does not exist in my backup location) other than that the return is as expected.
Can any one tell me why this is displaying and how to remove the invalid returns.
Best Regards and Happy Xmas
Neil
Message was edited by: removed para due to believe it was incorrect statement
So i beieve this is stored in the control file which has a default retention of 7 days (CONTROL_FILE_RECORD_KEEP_TIME)
Neil HunterHi,
Slimmed down RMAN report shows me the following, Sorry struggling with layout...
BS Key Type LV Size Device Type Elapsed Time Completion Time
26 Full 6.80M DISK 00:00:00 14-DEC-07
28 Full 6.80M DISK 00:00:00 15-DEC-07
30 Full 6.86M DISK 00:00:00 16-DEC-07
32 Full 6.86M DISK 00:00:01 17-DEC-07
34 Full 6.86M DISK 00:00:01 18-DEC-07
I have dates when selecting from v$backup_set from the 7,12,13 Dec? as well as the above..... extract as below
COUNT B CON INCREMENTAL_LEVEL PIECES START_TIM COMPLETIO ELAPSED_SECONDS BLOCK_SIZE INP KEE KEEP_UNTI KEEP_OPTIO
1 640712259 640712258 2 D NO 1 07-DEC-07 07-DEC-07 1 8192 NO NO
2 640712260 640712259 3 D YES 1 07-DEC-07 07-DEC-07 1 16384 NO NO
3 640712625 640712625 4 D NO 1 07-DEC-07 07-DEC-07 0 8192 NO NO
4 640712626 640712626 5 D YES 1 07-DEC-07 07-DEC-07 0 16384 NO NO
5 640712648 640712648 6 D NO 1 07-DEC-07 07-DEC-07 0 8192 NO NO
6 640712649 640712649 7 D YES 1 07-DEC-07 07-DEC-07 0 16384 NO NO
7 640713224 640713223 8 D NO 1 07-DEC-07 07-DEC-07 1 8192 NO NO
8 640713225 640713225 9 D YES 1 07-DEC-07 07-DEC-07 0 16384 NO NO
9 640713657 640713282 10 D NO 1 07-DEC-07 07-DEC-07 375 8192 NO NO
10 640713668 640713667 11 D YES 1 07-DEC-07 07-DEC-07 1 16384 NO NO
This could have been when I was setting up RMAN and testing taking a backup? how do I delete or will they expire....
Reference you previous emails the KEEP fields are blank......
Regards
Neil
Message was edited by:
Neil Hunter
Message was edited by:
Neil Hunter -
RMAN RETENTION POLICY FOR ORACLE8I
Dear all,
How to config RETENTION POLICY for oracle8i(CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;), same 9i ?
Thanks for advance !
CharaIn ORACLE 8i, there are NO stored RMAN parameters (I believe, 9i was the first version to add this feature).
Instead, in ORACLE 8i you had to specify all channel parameters, formats etc in a run block ... So, the good news is, in ORACLE 8i these parameters should be already "hardcoded" in the RMAN scripts ... in other words, nothing to transfer on a database level ... -
RMAN retention policy really long
Hi,
we are planning to have an RMAN backup policy really long, around 7 years, with all the backup piece stored on a shared drive.
I would like to ask if there are problems or concern to have a recovery windows of around 2500 days, and if I have to change other Oracle parameter like control_file_record_keep_time.
The oracle version is 10.2.0.4, on a Solaris box, the customer don't want you a Catalog.
thanks for your time
NunzioI Nikolay,
thanks for you answer.
Nikolay Ivankin wrote:
Nunzio Cafarelli wrote:
What do you mean for huge!? and, in your experience, we should expect some hi decrease of performance, or are we speaking of something like 1%.I can't say - I don't know db size, user's activity, amount of redo information, backup strategy.
You are right, it's not easy to have an idea of what will happen.
Except that 2 points, there are no other functionality concerns!?Aren't enough? I would say, those 2 points are enough to refuse to keep rman info in CF, but catalog db.
Honestly no, if I will have a big (supposing 40 Mb) control file, and I'll have a performance decrease of around 1% or 2% is my opinion that that 2 points are not enough to refuse to proceed in this way.
I'll be scared if I know that ORACLE can't manage that amount of days as recovery window, and I'll have problem if I need to recover the database in a point in time that, for example, is more than 3 years ago.
Anyway, thanks.
Regards
Nunzio -
RMAN backups does not match its retention policy
Hello,
I have couple of PROD instances on Windows environment with 11.2.0.3 DB version. RMAN retention policy is set to 14 days but I have noticed that backup is showing longer than that.
For example: LIST BACKUP OF DATABASE whows backups since 13th October. I also checked backup pieces at netapp share and they are present.
DELETE NOPROMPT OBSOLETE do not remove anything as expired backup.
I have clear retention policy and set to 14 days again but does not seem to work.
I would appreciate suggestion(s) regarding the strange issue.
Thanks a lot.
Best RegardsJohn-MK wrote:
Hello,
I have couple of PROD instances on Windows environment with 11.2.0.3 DB version. RMAN retention policy is set to 14 days but I have noticed that backup is showing longer than that.
For example: LIST BACKUP OF DATABASE whows backups since 13th October. I also checked backup pieces at netapp share and they are present.
DELETE NOPROMPT OBSOLETE do not remove anything as expired backup.
I have clear retention policy and set to 14 days again but does not seem to work.
I would appreciate suggestion(s) regarding the strange issue.
Thanks a lot.
Best Regards
We would need to know what kind of backups and when they were taken. Consider this scenario:
retention policy of 7 days.
Incremental level 0 backup taken on Sundays
Incremental level 1 backups taken Mon through Sat.
Let's say Oct 1 is a Sunday, so we take an inc-0 backup on Oct 1, and again on Oct 8.
Now let's say we are at Oct 10. Our 7 day retention policy dicatates that we be able to recover to any day back to Oct 3.
The only way we can recover to Oct 3 is to begin with that inc-0 backup from Oct 1.
All recovery begins with the last inc-0 backup prior to the point in time to be recovered. In a normal, regularly cycling schedule of backups, you will actually end up with backups 1 day short of being twice as old as your retention period.
Let's take a more extreme example. Same 7-day retention period, but after a single inc-0 backup, you don't take any more backups for 3 months. That one single backup is still needed to enforce your recovery window, and so is not obsolete, despite the fact it is 3 months old and your recovery window is only 7 days.
Also, you mention 'expired'. In terms of oracle backups, 'expired' is not the same as 'obsolete'.
"Obsolete" means 'no longer needed to enforce recovery policy'.
"Expired" is a bit more complex.
when a backup is taken, or an archivelog is written, a record of that is written to the repository. when you do an rman 'crosscheck', those repository records are compared to reality -- to see if the recorded backup file or archivelog file actually exists. Maybe someone used an OS command to delete them. Any file found to have 'gone walkabout' have their repository records marked as 'expired'. An rman 'delete expired' then removes those records from the repository. -
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." -
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
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