Need the rman backup sequence in taking the backup

Hi,
I just need the sequence in taking the backup of full database through rman.
Current method
1. Datafiles
2. Archivelog files
3. Control file.
But I am noticing missing of some archive log when i am doing the recovery files. So, i just want to change my nightly backup to the below procedure
1. datafiles
2. control files
3. archivelog files.
Correct me, the suitable procedure for scheduling.
Thanks,
Ramesh G
Edited by: user13095767 on Sep 7, 2012 9:02 PM

Let me explain my question once again..
I didn't get my requirements..
Recently, faced a scenario while recovery my database...
I am having nightly scheduled backup in the below manner...
1. database backup.
2. archive log files backup
3. control file backup.
My archive log files backup completed by 22:10. and my control file backup completed by 22:29. In between there was an archive generated at around 22:15.
i want to restore and recover the database with this backup. Followed the below scenario
1. restored the controlfile
2. restore database
3. recover database
Finally, it is asking for the archive generated at 22:15 and at 22:49.
So, by this i came to know that my database backed up with missing of archives. if i go with the below scenario of taking the backup
1. datafiles
2. control files
3. archive log files
Thinking that the archive log files backup pieces infomation will not be available in the controlfile..
Which one will be the best option in scheduling our backups.
Taking controlfile backup before archivelog or taking archivelog backup and then the controlfile.
Thanks,
Ramesh G

Similar Messages

Help needed on RMAN backup/recovery

Hi All,
I planning to implement the following backup strategy..
Online hotbackup is taking using RMAN without Recovery Catalog, Instead using controlfile autobackup to the repository. We the following backup schedules
1. Weekly full backup of database.
2. Daily Incremental backup with archive logs
And the backupset files created by the above schedule are stored in tape.
My Assumption:
As we are using control file autobackup, whenever i take full/incremental backup. the backup information will be stored in control file and the control files/spfile also will be backed up.
I did the following:
1. I have taken full backup(incr level=0) of database in the morning.
2. After taking the full backup, i did some transactions in one of the table.
3. Again, i have taken the incremental backup of the database.
4. All the backup pieces are stored in a tape.
My Doubt:
1. Now, controlfile will have information of full backup and incremental backup right?
2. If i restore the database in a new machine with these backups, both full backup files and incremental backup files are considered?
Thanks,
Praveen.

To answer your questions:
1. Now, controlfile will have information of full backup and incremental backup right?Yes.
2. If i restore the database in a new machine with these backups, both full backup files and incremental backup files are considered?YES.
HTH
Thanks
Chandra

RMAN Backup on another server

Hi,
I am using oracle database 11g, and I am taking RMAN backup in the same server.
But now I need this RMAN backup to be saved on another server.
I created one database directory, but it did not work with me, since it cannot see the location.
I used the same idea with export file to another server and it worked.
But with RMAN directory it could not work !!!.
So any idea about this ?
Thanks and Best Regards.
Pure,

Pure wrote:
Hi,
I am using oracle database 11g, and I am taking RMAN backup in the same server.
But now I need this RMAN backup to be saved on another server.
I created one database directory, but it did not work with me, since it cannot see the location.
I used the same idea with export file to another server and it worked.
But with RMAN directory it could not work !!!.
So any idea about this ?
Thanks and Best Regards.
Pure,How do I ask a question on the forums?
SQL and PL/SQL FAQ
my car does not go.
tell me how to make my car go.
Is COPY & PASTE broken for you?

Delete RMAN backup

Oracle 11.2.0.1
Windows
I takes RMAN backup at D:\RMAN_BAKCUP of our test database. Now there is space problem, I have to allocate some space to other folder. I shall take cold backup of database by shutdown. How do I start to delete RMAN backup from above location. It is incremental backup. What precautions should be there while deleting RMAN backup with archive logs.
Can I delete all archive logs too after consistent backup by shutting down the database ?
I am facing space problem, thats why I though that I shall take cold backup of db and now no need of rman backup as well as archive logs. Am I correct ?
Thanks.

user12050217 wrote:
Oracle 11.2.0.1
Windows
I takes RMAN backup at D:\RMAN_BAKCUP of our test database. Now there is space problem, I have to allocate some space to other folder. I shall take cold backup of database by shutdown. How do I start to delete RMAN backup from above location. It is incremental backup. What precautions should be there while deleting RMAN backup with archive logs.
Can I delete all archive logs too after consistent backup by shutting down the database ?
I am facing space problem, thats why I though that I shall take cold backup of db and now no need of rman backup as well as archive logs. Am I correct ?
Thanks.Given what else I've read in this thread (test database, no need for point in time recovery, etc.) A 'cold' backup may be appropriate, but I'd still use rman to do it. I have a similar situation right now with one of my test databases. I took an rman cold backup (database is open MOUNT) with KEEP UNTIL 'SYSDATE + 60'. Once, sometimes twice, a day the developer asks for a restore to the backup. Piece of cake with rman, especially with a little script all ready to go. Would be a bit more difficult with a 'user managed' backup.

Need help in the RMAN backup

Hi everybody
What are the steps needed if move the RMAN backup to other location in the OS level
(ie) every week i have to move the backup to other location

There are not problem for example:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\comp>set ORACLE_SID=W
C:\Documents and Settings\comp>sqlplus "/as sysdba"
SQL*Plus: Release 10.2.0.2.0 - Production on Mon Apr 26 14:53:08 2010
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
ERROR:
ORA-01031: insufficient privileges
Enter user-name:
C:\Documents and Settings\comp>sqlplus "sys/sm as sysdba"
SQL*Plus: Release 10.2.0.2.0 - Production on Mon Apr 26 14:53:15 2010
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 12
Current log sequence 14
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 125829120 bytes
Fixed Size 1288100 bytes
Variable Size 71305308 bytes
Database Buffers 46137344 bytes
Redo Buffers 7098368 bytes
Database mounted.
SQL> alter database archivelog;
Database altered.
SQL> alter databaseop;
alter databaseop
ERROR at line 1:
ORA-00940: invalid ALTER command
SQL> alter database open;
Database altered.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Pr
oduction
With the Partitioning, OLAP and Data Mining options
C:\Documents and Settings\comp>rman target sys/sm
Recovery Manager: Release 10.2.0.2.0 - Production on Mon Apr 26 14:55:58 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: W (DBID=754336873)
RMAN> backup database;
Starting backup at 26-APR-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=144 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\SYSTEM01.DBF
input datafile fno=00003 name=D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\SYSAUX01.DBF
input datafile fno=00005 name=D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\EXAMPLE01.DBF
input datafile fno=00002 name=D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\UNDOTBS01.DBF
input datafile fno=00004 name=D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\USERS01.DBF
channel ORA_DISK_1: starting piece 1 at 26-APR-10
channel ORA_DISK_1: finished piece 1 at 26-APR-10
piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\2010_04_26
\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP tag=TAG20100426T145611 comment=NON
E
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:34
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: starting piece 1 at 26-APR-10
channel ORA_DISK_1: finished piece 1 at 26-APR-10
piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\2010_04_26
\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP tag=TAG20100426T145611 comment=NON
E
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:05
Finished backup at 26-APR-10
RMAN> crossckeck backupset;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found "identifier": expecting one of: "allocate, alter
, backup, beginline, blockrecover, catalog, change, connect, copy, convert, crea
te, crosscheck, configure, duplicate, debug, delete, drop, exit, endinline, flas
hback, host, {, library, list, mount, open, print, quit, recover, register, rele
ase, replace, report, renormalize, reset, restore, resync, rman, run, rpctest, s
et, setlimit, sql, switch, spool, startup, shutdown, send, show, test, transport
, upgrade, unregister, validate"
RMAN-01008: the bad identifier was: crossckeck
RMAN-01007: at line 1 column 1 file: standard input
RMAN> crosscheck backupset;
using channel ORA_DISK_1
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\201
0_04_26\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP recid=1 stamp=717346573
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\201
0_04_26\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP recid=2 stamp=717346669
Crosschecked 2 objects
RMAN> delete expired backupset
2> ;
using channel ORA_DISK_1
List of Backup Pieces
BP Key BS Key Pc# Cp# Status Device Type Piece Name
1 1 1 1 EXPIRED DISK D:\ORACLE\PRODUCT\10.2.0\FLASH_R
ECOVERY_AREA\W\BACKUPSET\2010_04_26\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP
2 2 1 1 EXPIRED DISK D:\ORACLE\PRODUCT\10.2.0\FLASH_R
ECOVERY_AREA\W\BACKUPSET\2010_04_26\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP
Do you really want to delete the above objects (enter YES or NO)? y
deleted backup piece
backup piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\201
0_04_26\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP recid=1 stamp=717346573
deleted backup piece
backup piece handle=D:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\W\BACKUPSET\201
0_04_26\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP recid=2 stamp=717346669
Deleted 2 EXPIRED objects
now i copy all backup to c:\db
then
RMAN> catalog start with 'c:\db';
searching for all files that match the pattern c:\db
List of Files Unknown to the Database
=====================================
File Name: C:\db\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP
File Name: C:\db\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP
Do you really want to catalog the above files (enter YES or NO)? y
cataloging files...
cataloging done
List of Cataloged Files
=======================
File Name: C:\db\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP
File Name: C:\db\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP
RMAN> list backupset;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
1 Full 592.76M DISK 00:01:26 26-APR-10
BP Key: 4 Status: AVAILABLE Compressed: NO Tag: TAG20100426T145611
Piece Name: C:\DB\O1_MF_NNNDF_TAG20100426T145611_5XBRSX1M_.BKP
List of Datafiles in backup set 1
File LV Type Ckp SCN Ckp Time Name
1 Full 947689 26-APR-10 D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\SYSTEM01.
DBF
2 Full 947689 26-APR-10 D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\UNDOTBS01
.DBF
3 Full 947689 26-APR-10 D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\SYSAUX01.
DBF
4 Full 947689 26-APR-10 D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\USERS01.D
BF
5 Full 947689 26-APR-10 D:\ORACLE\PRODUCT\10.2.0\ORADATA\W\EXAMPLE01
.DBF
BS Key Type LV Size Device Type Elapsed Time Completion Time
2 Full 6.80M DISK 00:00:04 26-APR-10
BP Key: 3 Status: AVAILABLE Compressed: NO Tag: TAG20100426T145611
Piece Name: C:\DB\O1_MF_NCSNF_TAG20100426T145611_5XBRWXG2_.BKP
Control File Included: Ckp SCN: 947720 Ckp time: 26-APR-10
SPFILE Included: Modification time: 26-APR-10
RMAN>

Will RMAN backup all the needed files for me automatically ?

I have execued the following command:RMAN>CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
I want to know: Will RMAN backup all the needed files for me automatically every 14 days and delete the metadata of the files older than 14 days automatically?---------No.158

Short answer is No.
What's the definition of all needed files ? datafiles, control files, archive logs and/or online redo? and perhaps spfiles?
RMAN>CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;This is RMAN configure command, it won't do any backup by itself. You need to issue backup command to backup files needed.
You also need to delete obsolete files. The files will become obsolete after 14days but they will not remove themselves automatically.

Whats the difference ( RMAN BACKUP)

Please let me know the diffrence between
1.Alter database begin backup
2. backup database
After my own research all i can find is that Alter database begin backup freeeze the SCN and then we can copy the files from OS level
Where backup database directly create backup set ( backup piece) ..
I would like to know the functional differnce between the two if there is any...
Plus ...doing alter database begin backup ...am i not taking care of logical corruption..
Does alter database being backup does not validate or find out the logical corruption before...
I also came know from a OCA that it just puts in backup mode and dont really pay attention to checking or validating the files...before backin up.
Is that true?
Thanks in advance
Max
Edited by: Sunny-ORACLE on Aug 18, 2009 4:59 AM

Sunny-ORACLE wrote:
Please let me know the diffrence between
1.Alter database begin backup
2. backup database
After my own research all i can find is that Alter database begin backup freeeze the SCN and then we can copy the files from OS level
Where backup database directly create backup set ( backup piece) ..
I would the functional differnce between the two if there is any...The backup database doesn't need to freeze any headers as RMAN knows how to read the datafiles of oracle. Its knows them very well. So there is nothing we need in the case of rman to check that when the backup was done.
Plus ...doing alter database begin backup ...am i not taking care of logical corruption..
Does alter database being backup does not validate or find out the logical corruption before...
I came know from a OCA that it just puts in backup mode and dont really pay attention to checking or validating the files...before backin up.
Yes its correct, the commands, alter database begin backup pr backup database doesn't check for any sort of corruptions. Fordoing that, you either need to fire up oS util. DBV for checking the physical corruptions or use RMANs Backup Validate or Backup Validate Check Logical to check for physical/logical corruptions.
HTH
Aman....

Can RMAN backup and export datapump executed at the same time?

Hello,
I have several databases that I backup using RMAN and export datapump everynight starting at 6PM and end at Midnight. The backup maintenance window doesn't give me enough time for each database to run at different time. I am using crontab to schedule my backups. Since I have so many databases that need to be backed up between 6PM - Midnight, some of the export and RMAN backup scripts will execute almost at the same time. My question is can my export data pump and RMAN backup scripts run at the same time?
Thank you in advance.
John

Needs must. If you don't run expdp parallel then it doesn't use that much. If it was really killing the system then look into setting up a Resource plan that knocks that user down but this is a big step.
I woud better look into using Rman
system incrementals, and block change tracking, to minimize your RMAN time.
Regards
If your shop needs to do both simultaneously then go for it.
Chris.
PS : One of my shops has maybe 20-30 rmans and pumps all kicking off some simultaneous, some not, from 0000 to 0130. No complaints from users and no problems either. Go for it.
Edited by: Chris Slattery on Nov 25, 2012 11:19 PM

Oracle 9i RMAN backup filling up all disk and failing at the very end

Hello to all and thank you in advance for any input from any of you.
I am new in oracle and the only one in my company with a little bit of oracle knowledge, which is not a whole lot.
I inherited a few servers (Linux and Windows based). We mostly run all our production environment on a Linux box hosting oracle 10g release 10.2.0.1 but we had a legacy application server that still runs on 9i release 9.2.0.1.0. This server is a windows 2003 box, the previous DBA or someone else with admin rights to this machine compressed the whole drive where oracle resides, when I started summarying the oracle assets, I saw this server with no backups scheduled and a compressed disk with very limited space after this compression, only 13 GB left, the database if uncompressed would definitively filled up all the disk. The machine is in used and cannot be taken down for more than a couple of hours. We tried adding another disk but the machine only accept it as a hot spare. The database is in archive mode, when I tried to run a RMAN backup, it start filling up the database drive until it's empty and it crashes the whole machine, it seems like the buffer is growing and growing until it fills up the whole drive. The only way to get the server up and running again is to reboot the machine since the server is more than 6 years old we are not please with this action because we are afraid the machine would go south in one of those reboots.
Has anyone heard of similar issues when running RMAN on a compressed drive? Can the compressed disk have any involvement in this kind of odd behaviour? I tried running the backup in debug mode and creating a log in a different disk (the one where the backup is going to) and still the same issue. Again any help is much appreciate,
Sincerely,
Alex

Sybrand,
Thank you for your fast response, I am going to use your previous post to answer one by one your question,
1 The Oracle binaries --- on a compressed drive > Yes
2 The Oracle database control files redo log files and datafiles on that same compressed drive? > Yes
3 The archived redo log ditto? > Yes
I know for a fact (as I have been using that in 9i) you can create a RMAN backup on a compressed drive, and you can have your archived redo go to a compressed drive. No problemo! > Excellent good news!!!
But I would never touch the data files. Please note backup sets are multiplexed files consisting of multiple datafiles, so RMAN would need to do some calculations to decompress several blocks at the same time and to calculate a new block and compress it.
Do you have enough space to:
a) (preferred) to make datafile copies instead of a backup >
Not in the drive that hosts the oracle instance but yes on an external usb drive (1TB) I attached to use as a backup repository, maybe this is why I am having these issues. I only have 13 GB left on that drive where the oracle instance resides (actually as I explained in a previous reply to Mark, the server only has 3 slots for disks, two of them as configured as RAID 1 and the other is a hot spare because the RAID configuration manager cannot can only added as hot-spare. The raided disk are partitioned in two, one small partition is for the OS and the other is for the oracle instance). When you said make a copy of the datafiles, I assumed you are talking about doing manual backups, and copying the database after using using "alter tablespace tablespace_name begin backup; then copy the file; alter tablespace tablespace_name end backup;
b) use filesperset=1 on the backup command line, so the multiplexing (and associated calculations) stop. I have not tried the option of fileperset yet but I can tryi it and see if that helps.
Can you post the last few lines of the RMAN log where RMAN bombs out? Note: the last few lines. Not all of it, or you must send some paracetamol in conjunction! >
When I ran the debug option, I stopped the backup at less than 20% because I didn't want to reboot the system in the middle of the production time, the backup consumed at least 3 GB during the time was running. The times I ran the RMAN backup I didn't used the debug option so I don't have a log long enough to send unless you want the last few lines of what I have.
Thanks again for your input,
Sincerely,
Alex

RMAN backup on the physical standby database.

Hello,
11.2.0.3 EE database. Is it a requirement to open the database in read only mode in order to take a hot backup?
SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
SQL> ALTER DATABASE OPEN READ ONLY;
I've initiated a rman backup without opening the db in read only and the following output is so far:
RMAN> backup format '/dbstor2/LTS/LTS_rman/%d_set%s_piece%p_%T_%U' check logical database plus archivelog;
Starting backup at 15-OCT-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=603 device type=DISK
specification does not match any archived log in the repository
backup cancelled because there are no files to backup
I plan on taking this backup and using it to refresh our Dev and QA dbs. Do you see any issues with taking a backup without opening the db in ready only mode?
-SteveV

No we are not using Active Dataguard. An issue I am investigating is why can't I perform an archivelog backup from the standby?
RMAN> backup archivelog all format '/dbstor2/LTS/LTS_rman/arc.rman.bak';
Starting backup at 15-OCT-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=603 device type=DISK
specification does not match any archived log in the repository
backup cancelled because there are no files to backup
Finished backup at 15-OCT-12

The specified RMAN backup is invalid ?

Hi,
I'm trying to clone database by enterprise manager (OS: Win Server 2003, DB: 11gR1), but I'm getting the following error:
>
RMAN Backup Location - The specified RMAN backup is invalid. Could not identify controlfile from the backup.
>
I'm using this opyion:
>
-An existing database backup
-RMAN backup
>
The "* RMAN Backup Location" I selected is where a full database backup location.
what could be the problem?
Saad,

Saad Nayef wrote:
Hi,
I'm trying to clone database by enterprise manager (OS: Win Server 2003, DB: 11gR1), but I'm getting the following error:
>
RMAN Backup Location - The specified RMAN backup is invalid. Could not identify controlfile from the backup.
>As per the error message, the control file backup is not there. So did you take this backup or its passed over to you? Whoever did the backup, they need to confirm the validity of it including the control file backup status.
HTH
Aman....

Rman backup : what are the preconditions if any...?

hello all,
I have the following script for executing an rman backup in Unix server :
rman target=sys/change_on_install nocatalog <<EOF
RUN
allocate channel c1 type disk format '/orabackup/rman/b_%u_%s_%p';
allocate channel c2 type disk format '/orabackup/rman/b_%u_%s_%p';
allocate channel c3 type disk format '/orabackup/rman/b_%u_%s_%p';
set limit channel c1 kbytes 400000;
set limit channel c2 kbytes 400000;
set limit channel c3 kbytes 400000;
sql 'ALTER SYSTEM ARCHIVE LOG CURRENT';
backup incremental level 0 database;
backup archivelog all delete input;
copy current controlfile to '/orabackup/rman/contrl01.bak';
release channel c1;
release channel c2;
release channel c3;
Can any one tell me what are the preconditions/precautions if any to be taken before executing the above script such as whether the database should be open or mounted etc.
thanks in advance
thomaskprakash

database should be open or mounted etc.Definately you would be taking online backups, therefore, database up and running.
Database must be in archivelog mode.
Jaffar

How to ensure the rman backup is successful?

Hi,
we have scheduled rman backup jobs.
1. But how do we ensure all the rman backups are successful?
2. if the rman writes directly to tape, how do we ensure all tape backups are successful?
thanks
andrew

But what is incremental merge, couldn't find in the 10g manual?check it out on http://download.oracle.com/docs/cd/B28359_01/backup.111/b28270/rcmquick.htm#BRADV89354
do you use image backup in real production environment?Of course. We have a standard to to use image copies that way.
what do you suggest to do with rman normal way of backup or go for image backup?Depends on your specific situation. Like anything else, I prefer to provide some rationale on the recommendation.
Image Copies with Incremental Merge
Pros:
(1) one one full backup taken ever; no need to take another full backup
(2) the restore time is the same, regardless of the day of the week the db failed
(3) every day the incremental merge's success means the backup was good - an automatic validation
(4) it allows you to quickly switch to copy, rather than restore
Cons:
(1) Space requirement is more (since it's a bit to bit copy)
(2) can't do a point in time recovery from the disk alone
(3) can't go to the tape directly; must be a disk based backup.
Backupsets with Incremental Backup
Pros:
(1) space requirement is lower (since only never-used blocks are not copied)
(2) point in time recovery is possible
(3) direct backup to tape possible (no need for disk backup)
Cons:
(1) restore time varies depending on the day of the week the db failed
(2) you have to take a full backup regularly, perhaps once a week
(3) no validation unless you use validate backupset (takes resources)
So, as you can see, there are pros and cons to each approach. You have to decide for yourself which one weighs more (or less) to come to a conclusion.
Hope this helps.
Arup Nanda

How to set the Rman backup parameter.

Hi,
Can U guide me how to set the Rman backup path,control file auto backup & others parameter.

Hi,
Go through this,
Show all configurable settings:
RMAN>SHOW ALL;
Write disk backups to the /rmanback directory: (%U will be replaced with unique filenames)
RMAN> CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/rmanback/%U';
Backup using a flash recovery area rather than disk
RMAN> CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT CLEAR;
Configure RMAN to back up the control file after each backup
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;
By default, RMAN automatically names control file backups and stores them in the flashrecovery area.
To configure RMAN to write control file backups to the /backup directory:( %F will generate a unique filename)
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/backup/controlfile%F';
Ensure that RMAN retains all backups needed to recover the database to any point in time in the last 7 days:
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
Retain three backups of each datafile:
RMAN> CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
Delete backups no longer required by the retention policy:
RMAN> DELETE OBSOLETE;
To override the configured retention policy for individual backups - use BACKUP.. KEEP (or CHANGE.. KEEP)
Configure backups to run in parallel by assigning two sbt channels:
RMAN> CONFIGURE DEVICE TYPE sbt PARALLELISM 2;
Reset any CONFIGURE setting to its default by running the command with the CLEAR option
RMAN> CONFIGURE CHANNEL DEVICE TYPE sbt CLEAR;
RMAN> CONFIGURE RETENTION POLICY CLEAR;
Regards,
oraclekt
Edited by: oraclekt on Sep 1, 2010 9:58 PM

Configure backup agent to take the RMAN backup

Hi,
We have a Sun Storagetek SL48 tape library with us. we want to take the backup to tape using Rman.
In order to take the RMAN backup, we need a backup agent needs to be installed on the database server.
1. My doubt is If we have Sun Storagetek SL48 tape library, what backup agent needs to be installed on the server?
2. If we know agent name, Could you please share the document to install the agent?
Thanks for your help.
R.Sundaravel

These softwares support the SL48 and they have an agent for RMAN : Symantec NetBackup, Legato Networker.
For Symantec, please check this URL : http://www.symantec.com/business/support/index?page=content&id=HOWTO44847#v15496705
For Legato, this one : https://store.emc.com/Product-Family/DATA-DOMAIN-PRODUCTS/EMC-NetWorker/p/EMC-NetWorker

Need the rman backup sequence in taking the backup

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