Backup of one tablespace in noarchivelog mode

Hi,
I am running 10g.
Is it possibe to backup a specific tablespace in noarchive mode?
Thanks

Hi
I am able to backup the tablespace,
but after the recovery loosing the table data.
The database is in noarchivelog mode!
here is what I am doing:
my_table TABLE has 100 rows, and is saved under my_tablespace TABLESPACE.
RMAN> sql 'alter tablespace my_tablespace offline';
RMAN> backup tablespace my_tablespace;
RMAN> sql 'alter tablespace my_tablespace online';
Now I truncate the table
TRUNCATE TABLE my_table;
RMAN> sql 'alter tablespace my_tablespace offline';
RMAN> restore tablespace my_tablespace;
RMAN> recover tablespace my_tablespace;
RMAN> sql 'alter tablespace my_tablespace online';
Now the my_table TABLE is after the rcovery empty :-(
What I am doing wrong

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How to backup only one tablespace in cold backup noarchivelog mode

Hi,
How to backup only one tablespace in cold backup noarchivelog mode
Reagrds,
Rushang

We have to restore all 50 GB database if we fail in scripts meanwhile to start again the data load.
Out scripts populater only two tablespaces.
That's why if i take backup of those tabblespace then i have to restore only those tablespace not whole database.
Regards,
Rushang

Backup/restore tablespaces in noarchivelog mode

In our office there is a oracle 10g box that's used for testing purposes.
It's only got 1 database, but each user has their own tablespace.
As it's not a 'live' box, archivelog and flashrecovery have been disabled by the dba probably in favour of speed.
I have a NUnit test suit that runs across a tablespace, and I am trying to restore the tablespace before each run.
In noarchivelog mode, RMAN allows me to take the tablespace offline, and create a backup - so far so good.
Later on, I am able to take the tablespace offline again, and issue a "RESTORE TABLESPACE" command.
But then I cannot bring the tablespace online without issuing a "RECOVER" command.
I have tried the NOREDO option but it still says that the file needs a media recovery before it can be brought online.
Is there a way to bring the tablespace online without applying the REDO logs ?
Or is tablespace backup/restore not possible because of noarchivelog ?
Thanks.

I tried the TTS method, and it was only marginally quicker than a data_only impdp.
I suspect this is due to the nature of a fresh nunit test database, where the metadata (huge tables structure, stored proc, etc) is often larger than the table contents itself.
In the grand scheme of things it might even end up slower, as i need to drop the tablespace including contents if i want to use TTS to load up the backed up dbf.
From the comments I'm guessing that there's no way of just updating the timestamp of the tablespace without applying the REDO logs then ?
I've tested other methods as well.
Flash recovery could only work on a table or db level, I can't take the db offline as there are other users on it with their own tablespace/schemas. (it was an old dev's box, we're reusing what we can)
impdb with the truncate and data_only flag seems to be the only viable option so far, with TTS up for consideration.

System datafile block corruption - no backups and database in NOARCHIVELOG mode

Dear All,
Database version - oracle 11.1 Enterprise
OS - RHELinux 5.8
What are the options of recovering from physical block corruption when there are no backup available to perform block media recovery?
V$DATABASE_BLOCK_CORRUPTION reports two segments corrupted (please see attached image for details).
1 table in system datafile - sys_fba_barrierscn
1 index - (applicaiton index)
What are my options?
I know there is a possibility that the database will not restart after a shutdown due to corruption in system tablespace.
Database is in noarchivelog mode. So online backups are not possible and there aren't any full backups either.
I am thinking of below,
1. Run dbms_repair with fix_block_corruption. - Still database startup might fail?
2. Shutdown the database and take offline full backup with RMAN MAXCorrupt option.
Appreciate your suggestions and advises.
Thanks
Stefan

Thanks Sybrand,
Agree with your first two suggestions .
Also scheduled a expdp job tonight. (Only backup like thing they had was a expdp cron, but until today all the large tables were failing due to small undo_retention).
Yes. Flashback is not used. So hopefully it will not affect the a database restart i guess?
Related to dbms_repair, I was referring to - http://askdba.org/weblog/2010/08/physical-corruption-ora-1578-part-3/.
Where DBMS_REPAIR.FIX_CORRUPT_BLOCKS and DBMS_REPAIR.SKIP_CORRUPT_BLOCKS used.
Which i think will not use any redo.
Thanks
Stefan

What files can be excluded from user-managed backup in noarchivelog mode?

what files can be excluded from user-managed backup in noarchivelog mode?
control files,
sqlnet.ora file,
tnsnames.ora,
datafiles associated with read-only tablespaces,
datafiles associated with read/write tablespaces,
of these, what can be excluded and what have to be included?
Thanks.

... and don't forget pfile or spfile... it can help too.
Re: What are generally backed up during the backup?
Nicolas.

Can't backup database in NOarchivelog mode

Hi there,
I get this error when I run this command from rman:
backup database
Starting backup at 19-JAN-11
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/19/2011 17:18:10
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
please help.
Thanks in advance!

user13286861 wrote:
ok it finally shutdown cleanly.
I altered it in archivelog mode.
Now I can run a backup database command from rman?What does it cost to try it and see? What would be the worst thing that could possibly happen? An error message saying you can't do that?
And please note, this forum is not a chat line. Operators are NOT standing by. Posting a new message every two minutes to give an update on the fact that the database hasn't shut down yet is not necessary and not productive.
If there are a lot of pending transactions when you issue SHUTDOWN IMMEDIATE, they will all have to be rolled back as part of the shutdown. That can take some time. And if you bypass that with SHUTDOWN ABORT, they will have to be rolled back as part of instance crash recovery on the next startup, which will also take some time. Five minutes may feel like an eternity when you are sitting there waiting for your command to complete, but is no reason to panic.

ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode

Hi All
Its my first time to use RMAN in our ERP EBSR12
our database version is 11g
Please help how to resolv and make successfully backup
RMAN> backup database;
Starting backup at 24-JAN-11
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/24/2011 11:18: 25
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
continuing other job steps, job failed will not be re-run
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 24-JAN-11
channel ORA_DISK_1: finished piece 1 at 24-JAN-11
piece handle=/oracle/mybackup_db/PROD2/backupset/2011_01_24/o1_mf_ncnnf_TAG20110 124T111824_6msvw4cv_.bkp tag=TAG20110124T111824 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/24/2011 11:18: 25
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
RMAN>
Thanks

ORA-19602: cannot backup or copy active file in NOARCHIVELOG modeIs your database in archivelog or noarchivelog mode?
How to Turn Archiving ON and OFF [ID 69739.1]
Please also see these docs/links.
ORA-19602 Using RMAN to Backup Database [ID 246183.1]
COLD RMAN backup fails: Ora-19602 even after SHUTDOWN IMMEDIATE and STARTUP MOUNT [ID 373828.1]
Backup & Recovery
http://www.oracle.com/pls/db112/portal.portal_db?selected=14&frame=#backup_and_recovery
Thanks,
Hussein

Restoring backup taken in NOARCHIVELOG mode

Hi I have a test database in noarchivelog mode. The backup I am implementing involves:
Shutting down the database in immedtiate mode. Taking a complete backup of the
a) Datafiles
b) Controlfiles
c) Redo log files
d) Parameter file
e) Password file
Now, when I want to restore in case of any media failure, I will copy all the above file to their respective locations.
Here my question is that, do I require to open the database after restoring all the datafiles,controlfile and redo files(in particular) in the RESETLOG mode or as I will be overwriting the current useless redo log files with the backup redo log files, I can just open the database normally?
What I am thinking is to open the database with alter database open
Please comment with full explanation.

>
Hi I have a test database in noarchivelog mode. The backup I am implementing involves:
Shutting down the database in immedtiate mode. Taking a complete backup of the
a) Datafiles
b) Controlfiles
c) Redo log files
d) Parameter file
e) Password file
Now, when I want to restore in case of any media failure, I will copy all the above file to their respective locations.
Here my question is that, do I require to open the database after restoring all the datafiles,controlfile and redo files(in particular) in the RESETLOG mode or as I will be overwriting the current useless redo log files with the backup redo log files, I can just open the database normally?
What I am thinking is to open the database with alter database open
>
Your thinking is right :-) You have chosen the simplest but not necessarily most efficient or reliable backup method. You simply get the whole database back from backup, so there is no resetlogs necessary. But keep in mind that you lose all modifications since your backup.
Kind regards
Uwe
http://uhesse.wordpress.com

Rman backup in noarchivelog mode

hi all,
My database(ORCL) is in noarchivelog mode
I am taking RMAN backup using recovery catalog(backupdb)
target database(ORCL) is in mount mode
I am getting following errors:
RMAN> backup database;
Starting backup at 01-AUG-08
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00601: fatal error in recovery manager
RMAN-03004: fatal error during execution of command
RMAN-10039: error encountered while polling for RPC completion on channel defaul
t
RMAN-10006: error running SQL statement: select act from x$ksusex where sid=:1 a
nd serial=:2
RMAN-10002: ORACLE error: ORA-12571: TNS:packet writer failure
RMAN-03002: failure of backup command at 08/01/2008 15:52:03
ORA-03114: not connected to ORACLE
I again tried and then i got these errors:
C:\Documents and Settings\Administrator>set oracle_sid=backupdb
C:\Documents and Settings\Administrator>rman catalog rman1/rman
Recovery Manager: Release 9.2.0.1.0 - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
connected to recovery catalog database
RMAN> connect target sys/sys@orcl
connected to target database (not started)
RMAN> backup database;
Starting backup at 01-AUG-08
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 08/01/2008 16:12:40
RMAN-06403: could not obtain a fully authorized session
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
RMAN>
please explain
Message was edited by:
ArchanaTewatia

Hi,
Try to study the errors Correctly ..
RMAN> connect target sys/aqtechmvardi@orcl
connected to target database (not started)
RMAN> backup database;
Starting backup at 01-AUG-08
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 08/01/2008 16:12:40
RMAN-06403: could not obtain a fully authorized session
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Try to mount the Target DataBase it will work.
Thanks
Pavan Kumar N

Hot backup on NOARCHIVELOG mode?

DB version:10gR2, 11G
Why is it not possible to do a Hot Backup in NOARCHIVELOG mode? What role does archived redo log files have in a Hot backup?

Because it takes more than zero seconds to backup a database.
Say your database consists of 1 single datafile of 10MB. This datafile, at the OS filesystem level, consists of 2,560 blocks of 4KB each.
If you start a backup of the datafile, the OS utility (tar, cp, cpio, whatever command) reads the first 4KB block and copies it out. It then, after a certain time, reads the next block. And so on till it gets to the last block of the file.
However, since the database is "open" transactions may have updated blocks in the datafile.
Therefore, at time t0, block 1 may have been copied out. At time t5, block 128 may have been copied out. At time t32, block 400 may have been copied out. Unfortunately, some user may have updated block 1 at time t3 and block 128 at time t8.
What would happen if these blocks, having been copied out at different times were restored ? They would be inconsistent !!
It is the ArchiveLog mechanism that allows Oracle to know that a datafile was "active" when it was being backed up. Oracle has to "re-play" all changes that occurred on the datafile from the time the datafile backup began (at t0) till it ended (at the 2,560th block).

Restore using incremental backup with noarchivelog mode

Hello experts,
We are running SAP on Oracle databse(IN NOARCHIVELOG MODE) for which we are having full offline backup on every sunday and post which incremental backups on rest of the days. We have scenario to do restore db to the state till last friday's incremental backup.
Please let us know the procedure for restoring till that point. If possible using brtools utility(which is SAP specific).
Thank You
Regards,
Venkateshwar

If you do not want to read the whole doc This is the snippet for you.
Recovering a NOARCHIVELOG Database with Incremental Backups
Restoring a database running in NOARCHIVELOG mode is similar to restoring a database in ARCHIVELOG mode. The main differences are:
Only consistent backups can be used in restoring a database in NOARCHIVELOG mode.
Media recovery is not possible because no archived redo logs exist.
You can perform limited recovery of changes to a database running in NOARCHIVELOG mode by applying incremental backups. The incremental backups must be consistent, like all backups of a database run in NOARCHIVELOG mode, so you cannot make backups of the database when it is open.
When you are recovering a NOARCHIVELOG database, specify the NOREDO option on the RECOVER command to indicate that RMAN should not attempt to apply archived redo logs. Otherwise, RMAN returns an error.
To recover a NOARCHIVELOG database with incremental backups:
After connecting to the target database and the recovery catalog, place the database in a mounted state:
STARTUP FORCE MOUNT
Restore and recover the database.
For example, you can perform incomplete recovery with the following commands:
RESTORE DATABASE
FROM TAG "consistent_whole_backup";
RECOVER DATABASE NOREDO;
Open the database with the RESETLOGS option.
For example, enter the following command:
ALTER DATABASE OPEN RESETLOGS;

Recover a deleted record in NOARCHIVELOG mode?

Hello,
I'm running 10gR2 in NOARCHIVELOG mode and we do not take backups (please, let's not get into a discussion about this!).
I need to know if there is any possible way to recover a record once it has been deleted and a COMMIT has been issued? A user inserted two records in the database that they should not have, and I need to verify there is no possible way to recover those once they have been deleted.
Thank you,
Mimi

Mimi Miami wrote:
Ok so my UNDO_RETENTION parameter is set to 900...so 15 minutes after I delete the records they should not be querable using Flashback Query any longer, right?No,
UNDO_RETENTION is low threshold value of undo retention. Meaning, Oracle will try to keep at least that time before overwritten.
However, it's not gurranteed if not enough undo tablespace available, meaning it can be overwritten before the value is up if not enough undo tablespace to serve new transaction.
On the other-hand, it will not remove the undo record until it's overwritten, meaning the record could stay there for considerable amount of time if your database is not busy and undo tablespace is big.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/initparams222.htm#REFRN10225
Not sure what's the intention to make your delete irreversible,
you could actually create table newtable as select .. from old_table where <except the two records>.
Drop the old table and rename new table.
purge the recycle bin of your database

Media failure in Noarchivelog mode

Dear all,
I am running Oracle database 10g in noarchivelog mode.
It has a media failure, a datafile has corrupted. How can i recovery it suppose i dont have the latest backup?
Thanks and regards,
Steve

Hi,
since you don't have a backup, and you have a media failure, you cannot recover.
You can set the tablespace/datafile in question offline, and work with whatever is left in the remaining datafiles. (i.e. export/import elsewhere)
if the file is just corrupted, and not lost,
you may be able to get some of the data back using oracles data unloader, but that is going to be expensive (i.e. you would need to engage oracle consulting to do it for you)
i strongly recommend you get familiar with the rman tool next time around, this is quite capable of performing backup and recovery.
Karsten

Standby in Noarchivelog mode

Hello,
Standby Redo Log must be archived before the redo data can be applied to the standby database. If we put our standby database in noarchivelog mode, then standby database does not generate any archive.Because of this Redo data wont apply to the standby database. Right? Is this the reason why we put standby database in archivelog mode?
Thanks

Hello;
Standby Redo Log must be archived before the redo data can be applied to the standby database.That statement is not correct.
If we put our standby database in noarchivelog mode, then standby database does not generate any archive. Because of this Redo data wont apply to the standby database. Right?That statement is not correct either. While Standby can use a process which is like generating archive, archive is really being transported from the Primary database.
Is this the reason why we put standby database in archivelog mode?Yes. If you switch modes the standby becomes the primary and needs to be in archivelog mode.
Failover
If you do a failover there are two main methods for recovery, RMAN and Flashback. You want your Standby database to be ready for use as a Primary, otherwise why have it? So you need to have it ready for anything including recovery.
I debated the archive question with somebody here last year. They claim the Standby produces Archive because such and such a process does this. I disagree. In Standby mode the database is not doing what a Primary mode database does. Those Oracle processes don't create new archive, they complete the transfer of archive from a Primary. The Sequence number was created on the Primary.
From Oracle document
"If all databases in a distributed database operate in ARCHIVELOG mode, you can perform coordinated distributed database recovery. However, if any database in a distributed database is in NOARCHIVELOG mode, recovery of a global distributed database (to make all databases consistent) is limited by the last full backup of any database operating in NOARCHIVELOG mode."
If you search this document
Data Guard Concepts and Administration 11g Release 2 (11.2) E10700-02
For "ARCHIVELOG" you get several hits.
If you search for "NOARCHIVELOG" you get none.
I suppose in theory you could run a Standby in "NOARCHIVELOG" but you gain nothing. If you ever have a switchover or failover you need to fix this ASAP. I see no reason to add that item to my checklist. It just an extra step and in the event of a failover one I could be very unhappy about.
Best Regards
mseberg
Edited by: mseberg on Mar 15, 2013 1:25 PM

Backups when the DB in NOARCHIVELOG

Hi
Assume the DB is in NOARCHIVELOG mode
Is it possible to
- back up the SYSTEM tablespace in your database when the database is open?
- backup a read-only tablespace even when the database is open?
- back up a dictionary-managed tablespace even when the database is open?
(It says:
A dictionary-managed tablespace can be backed up by placing the tablespace in the online backup mode and copying the corresponding datafiles.)- What is meant by 'online backup mode'?
-IS it possible to backup a datafile, either the relavent tablespace is online/offline/read only
Thanks
Edited by: Zerandib on Sep 25, 2008 2:03 PM
Edited by: Zerandib on Sep 25, 2008 2:16 PM

Hi,
Online Backup Mode:
Tablespace Backup:
Each tablespace that needs to be backed-up must be switched into backup mode before copying the files out . Look at this simple example:
ALTER TABLESPACE test BEGIN BACKUP;
! cp db_test_01.dbf /backupDir/
ALTER TABLESPACE test END BACKUP;
Database Backup:
Since 9i you can do it at DB level:
Alter database begin backup;
-then copy all the files
Alter database end backup;
Don forget to make a copy of the controlfile too:
ALTER SYSTEM SWITCH LOGFILE; -- Force log switch to update control file headers
ALTER DATABASE BACKUP CONTROLFILE TO '/backup/control.dbf';Cheers,
Francisco Munoz Alvarez
http://www.oraclenz.com

Backup of one tablespace in noarchivelog mode

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