How to use Flash recovery area only for flashback database feature

I would like to use flash recovery area only for flashback database feature, which means, flash recovery area will store only flashback logs.
I dont want to use that file system for any other files, like archive log files, database backups, control file copies, multiplex redo log, etc
is it possible? I want to use this feature only for flashback database option and hence i dont want to disturb any existing configuration in my database
including backup jobs. Is it required to store archive redo log files also in flash recovery area to use the flashback database feature?
I certainly can't afford to have a copy of entire database in this file system as size of my DB is more than the flash recovery area file system I have.
Thanks
Sarayu

user13312943 wrote:
Aman,
I think i was not clear in my question. Let me try again
My only requirement is to use flashback database feature (or be prepared to use if required). I dont want to create a large file system to use this FRA to store all these files. Out of all the files being stored here copy of data files seems to be consuming more space. I see these files are classified as transient and permanent files. I am okay with permanent files. I fear that this file system may consume more space if i store backup files on disk. I want database backups to go to tapes, not to the FRA disk. Is it possible?
Thanks for your reply
Okay, well in that case you can use RMAN and push the backups to the tape drives. FLB logs would be stored on the FRA.
Aman....

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Are you on Windows or Unix? And are you using ASM?
I'll assume you are on Windows....So after allocating the drive, you will format it say as F drive. Then you can create a directory T:\Flash. The parameter determining the location of the flash recovery area is db_recovery_file_dest. But you also need to set the size of the flash recovery area as well. After that's done. You can do your backups to Flash and see if the directory is populated.

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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.
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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
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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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Click the Clear Display icon in the toolbar. Then try the action that you're having trouble with again. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
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Flash recovery area: archivelog file directory modification time

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bvsmdb01-oracle10g $ date
Thu Jan 24 16:04:46 GMT 2008
bvsmdb01-oracle10g $ ls -lt archivelog
total 20
drwxr-x--- 2 oracle10g oinstall 1024 Jan 24 16:00 2008_01_24
drwxr-x--- 2 oracle10g oinstall 512 Jan 23 23:30 2008_01_19
drwxr-x--- 2 oracle10g oinstall 1536 Jan 23 23:04 2008_01_23
drwxr-x--- 2 oracle10g oinstall 1536 Jan 22 23:30 2008_01_18
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drwxr-x--- 2 oracle10g oinstall 1024 Jan 21 23:07 2008_01_21
drwxr-x--- 2 oracle10g oinstall 512 Jan 20 22:20 2008_01_20
bvsmdb01-oracle10g $
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The current redundancy setting in RMAN is shown in the output of show all:
RMAN> show all;
using target database control file instead of recovery catalog
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CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 3 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 '%F'; # default
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 MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/10.2.0/dbs/snapcf_kierli.f'; # default
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The modification time for the archivelog directory 2008_01_19 has a modification time of Jan 23 23:30 2008.
Why is this? How can this be investigated? Does anyone have any suggestions?
Thanks
Jerry Mander

From 2 Day DBA:
Even after files in the flash recovery area are obsolete, they are generally not deleted from the flash recovery area until space is needed to store new files. As long as space permits, files recently moved to tape will remain on disk as well, so that they will not have to be retrieved from tape in the event of a recovery.
What is the current space used in the FRA and what is the FRA disk limit ?

Flash recovery area, need help!

Hi! I have some problems with Flash Recovery Area. I use Oracle 10g.
So,
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Applied changes and shutdown DB. After I started DB and see the Flash Recovery Area Size then I can see that it is old one - 10GB and free space is with "-" sign, see: http://my.jetscreenshot.com/2677/20111129-bwlw-101kb
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1) Mybe I can't change recovery area size because there somewhere area size is limited to 10gb, because I do not understand why always after restart there is 10gb... :(You are missing something when you bounce, Make sure you have started with same SPFILE, You have to load the same PFILE/SPFILE when you performed changes.
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check these links
http://docs.oracle.com/cd/B19306_01/backup.102/b14191/advmaint.htm#i1006414
http://docs.oracle.com/cd/B28359_01/server.111/b28301/backrest004.htm

CS6 Recovery REALLY only for "C" drive?

I've seen a couple discussions in here about recovery in CS6. And that it only works if you have your scratch disk on "c"...
Has anyone from Adobe CONFIRMED this? And if so, PLEASE tell me someone is going to FIX such a stupid flaw...
Anyhow, this morning, spent an hour or so cleaning up and image... And FORGOT to save the .psd file before I resized it and save a jpg. Which NORMALLY isn't a problem - just back up in history and save prior to the crop.... UNFORTUNATELY, Photoshop HUNG while saving the jpg, which it has never done before, and I was unable to save the psd 'cause I kept getting the popup telling me it was saving in background and I'd have to wait. I finally had to kill the process.
Went out and checked my scratch partion - which happens to be "q", and of course theres a recovery folder, in which is a folder with my name... IN WHICH THERE'S ABSOLUTELY NOTHING..........
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Noel Carboni wrote:
Unfortunately that's not true 100%, and I think that could be part of the issue here.
It seems that parts of Photoshop do use the standard locations some of the time.
However, under no conditions is it expected that a user would normally store user-specific data at the root directory of a drive volume (e.g., D:\), yet that's exactly where it tries to put it if you select that drive for scratch. And I'm not just talking about the big scratch files normally seen, but also stuff like that bevy of ...MVM... files that just seem to show up wherever. Some folks even see those being written to the root folder on external drives!
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I can not fully agree whith you here the above is more your own view on how things should be we all have our own views as does Adobe. While each user can set the disk that they want Photoshop to use for temp scrach data the setting clearly shows that the files will be in the disk root. I feel this is good for when Photoshop failes to clean up after itsselef these file stick out like a saw thumb and are quickly deleted by me. I would hate to be running out of disk space on some drive because Photoshop failed to clean up and where I would have to search for where these files are and worst case would be if ever user had their own scratch areas not in the root. I feel it would be a bigger mess. The intent of this preference is to enable the user to seperate the devices used by the system and photoshop for basiclly paging storage. These files have a temp extention and I like the fact the are always in volumes roots.

Proper layout of datafiles, archivelogs, flash recovery area

Hi all,
Sorry a bit of a newb,
Have a question about how to layout my db files.
My understanding is that control and archivelog files should be multiplexed to a separate disk than the datafiles.
Is this also true for the flash_recovery_area?
Thanks for any help.

geeter wrote:
Hi all,
Sorry a bit of a newb,
Have a question about how to layout my db files.
My understanding is that control and archivelog files should be multiplexed to a separate disk than the datafiles.
Is this also true for the flash_recovery_area?
Thanks for any help.Lose your control file or your redo file, and you have a problem. Therefore, in a professional environment, the control file and redo logs need to be protected by multiplexing to different physical drives (not different partitions on same disk). One of those locations can be the same DASD as the database files.
Archivelogs should be bounced from online to nearline to offline storage. These days 'online' is inside flash recovery area. If you are paranoid, you can send archivelogs to multiple destinations (multiplex), although some form of disk protection (RAID 1 ... or 5 - ugh!) should be sufficient.
Flash Recovery Area can be inside ASM or on regular file system. If in ASM, consider using either RAID 1 under ASM and external failgroups, or normal failgroup mode to allow the system to do it's own RAID 1 equivalent. If on regular file system, use standard disk protection (RAID 1 or 5) to do the protection.
Oracle uses the SAME (Stripe and Mirror Everything) philosophy, so separating Fast Recovery Area (new name - used to be Flash Recovery Area in the ancient days of Oracle 10g) from database files is not needed.
Highly recommend you read the first chapter of the Database Concepts Manual and the first chapter of the Database Administrator Guide to get used to the docs, adn then use that as a pringboard (via table of contents) to the sections that answer your question. Start at http://tahiti.oracle.com to get to those docs - they are on the front page of the doc set for your favorite version.

Changing the location of archive log from flash recovery area PLZ HELP!!!

Hi All,
My archive log is being stored in flash memory area which got full and the production server went down.
alert log file details.....
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 43432960 bytes disk space from 2147483648 limit
*** 2010-04-25 14:22:49.777 62692 kcrr.c
ARCH: Error 19809 Creating archive log file to
'/oracle/product/10.2.0/flash_rec
overy_area/EDWREP/archivelog/2010_04_25/o1_mf_1_232_%u_.arc'
*** 2010-04-25 14:22:49.777 60970 kcrr.c
kcrrfail: dest:10 err:19809 force:0 blast:1I removed the files and started the database,
Can someone kindly tell me as to how to avoid this problem in future by keeping archive log destination in flash recovery area.
I want to change the location of archive log files, can someone please guide me as to hiow to do that
I changed the size of flash recovery area for the time being, but i am afraid it will be full again!!
SQL> select * from v$flash_recovery_area_usage;
FILE_TYPE    PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
CONTROLFILE                   0                         0               0
ONLINELOG                     0                         0               0
ARCHIVELOG                99.44                         0              57
BACKUPPIECE                   0                         0               0
IMAGECOPY                     0                         0               0
FLASHBACKLOG                  0                         0               0
6 rows selected.
SQL> alter system set DB_RECOVERY_FILE_DEST_SIZE = 4G ;
System altered.
SQL> select * from v$flash_recovery_area_usage;
FILE_TYPE    PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
CONTROLFILE                   0                         0               0
ONLINELOG                     0                         0               0
ARCHIVELOG                49.72                         0              57
BACKUPPIECE                   0                         0               0
IMAGECOPY                     0                         0               0
FLASHBACKLOG                  0                         0               0
6 rows selected.regards,
Edited by: user10243788 on Apr 25, 2010 6:12 AM

user10243788 wrote:
Hi All,
My archive log is being stored in flash memory area which got full and the production server went down.
alert log file details.....
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 43432960 bytes disk space from 2147483648 limit
*** 2010-04-25 14:22:49.777 62692 kcrr.c
ARCH: Error 19809 Creating archive log file to
'/oracle/product/10.2.0/flash_rec
overy_area/EDWREP/archivelog/2010_04_25/o1_mf_1_232_%u_.arc'
*** 2010-04-25 14:22:49.777 60970 kcrr.c
kcrrfail: dest:10 err:19809 force:0 blast:1I removed the files and started the database,
Can someone kindly tell me as to how to avoid this problem in future by keeping archive log destination in flash recovery area.
I want to change the location of archive log files, can someone please guide me as to hiow to do that
I changed the size of flash recovery area for the time being, but i am afraid it will be full again!!
SQL> select * from v$flash_recovery_area_usage;
FILE_TYPE    PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
CONTROLFILE                   0                         0               0
ONLINELOG                     0                         0               0
ARCHIVELOG                99.44                         0              57
BACKUPPIECE                   0                         0               0
IMAGECOPY                     0                         0               0
FLASHBACKLOG                  0                         0               0
6 rows selected.
SQL> alter system set DB_RECOVERY_FILE_DEST_SIZE = 4G ;
System altered.
SQL> select * from v$flash_recovery_area_usage;
FILE_TYPE    PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
CONTROLFILE                   0                         0               0
ONLINELOG                     0                         0               0
ARCHIVELOG                49.72                         0              57
BACKUPPIECE                   0                         0               0
IMAGECOPY                     0                         0               0
FLASHBACKLOG                  0                         0               0
6 rows selected.regards,
Edited by: user10243788 on Apr 25, 2010 6:12 AMPointing the archive log dest (and/or the FRA) to a new location, or enlarging them, will do no good if you are not performing regular housekeeping on the archivelogs. You will just keep knocking down the same problem over and over.
If you simply delete the archivelogs at the OS level, the database will never know about it and it will continue to think the destination is full, based on records kept in the control file.
For regular housekeeping, you need to be doing something similar to this in rman:
run {
backup archivelog all not backed up 1 times tag='bkup_vlnxora1_arch';
delete noprompt archivelog all backed up 1 times to device type disk;
run {
delete noprompt obsolete;
crosscheck archivelog all;
delete noprompt expired archivelog all;

How to use Flash recovery area only for flashback database feature

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