Reduce Time for Rman Backup

Dear Experts;
rman for 0 level backup is taking about 5:26 hours, backup size is now 312gb I have enabled block track checking & it reduces time for incremental level 1 from 2hour to almost 3 minutes.
database shows biggest tablespace is "users"
I want valuable suggestions for reducing its time or is there any way to break 0 level backup. I can allocate channels but ultimately it will take time when taking "users" tablepace backup
Right now I am taking backup at usb drive & its version is 2.0
Regards

As you are taking backup to a usb drive there is not much that can be done to improve the speed. If you are concerned about the backup being slow.. then you could think of taking the backup on local disk( which would be faster and more efficient) and then move the backups from the disk to usb drive.
This can be done in a single backup script as 2 part operation.
1) take backup to disk.
2) copy the backup to usb drive and delete the backups from the disk.
There are many additional features that u can add to enhance it thoe.
Regards,
V

Similar Messages

Best pratices for RMAN backup management for many databases

Dear all,
We have many 10g databases (>40) hosted on multiple Windows servers which are backup up using RMAN.
A year ago, all backup's were implemented through Windows Scheduled Tasks using some batch files.
We have been busy (re)implementing / migrating such backup in Grid Control.
I personally prefer to maintain the backup management in Grid Control, but a colleague wants now to go back to the batch files.
What i am looking for here, are advices in the management of RMAN backup for multiple databases: do you guys use Grid Control or any third-party backup management tool or even got your home-made solution?
One of the discussion topic is the work involved in case that the central backup location changes.
Well... any real-life advices on best practices / strategies for RMAN backup management for many databases will be appreciated!
Thanks,
Thierry

Hi Thierry,
Thierry H. wrote:
Thanks for your reaction.
So, i understand that Grid Control is for you not used to manage the backups, and as a consequence, you also have no 'direct' overview of the job schedules.
One of my concern is also to avoid that too many backups are started at the same time to avoid network / storage overload. Such overview is availble in Grid Control's Jobs screen.
And, based on your strategy, do you recreate a 'one-time' Oracle scheduled job for every backup, or do your scripts create an Oracle job with multiple schedule?
You're very welcome!
Well, Grid Control is not an option for us, since each customer is in a separate infrastructure, and with their own licensing. I have no real way (in difference to your situation) to have a centralized point of control, but that on the other hand mean that I don't have to consider network/storage congestion, like you have to.
The script is run from a "permanent" job within the dba-scheduler, created like this:
dbms_scheduler.create_job(
        job_name        => 'BACKUP',
        job_type        => 'EXECUTABLE',
        job_action      => '/home/oracle/scripts/rman_backup.sh',
        start_date      => trunc(sysdate)+1+7/48,
        repeat_interval => 'trunc(sysdate)+1+7/48',
        enabled         => true,
        auto_drop       => false,
        comments        => 'execute backup script at 03:30');and then the "master-script", determines which level to use, based on weekday from the OS. The actual job schedule (start date, run interval etc) is set together with the customer IT/IS dept, to avoid congestion on the backup resources.
I have no overview of the backup status, run times etc, but have made monitoring scripts that will alert me if/when a backup either fails, or runs for too long. This, in addition with scheduled disaster/recovery tests makes me sleep rather well at night.. ;-)
I realize that there (might be) better ways of doing backup scheduling in your environment, since my requirements are so completely different than yours, but I guess that we all face the same challenges in unifying the environments as much as possible, to minimize the amount of actual work we have to do. :-)
Good luck!
//Johan

Volume Duplication Policy for RMAN Backups

Hi,
I wish to configure a volume duplication policy for RMAN backups. Both the source media family and duplicate media family are 'content managed' as per the documentation. However, the duplication policy 'trigger' is defined as if the media family is 'time managed', which does not seem to make sense in 'content-managed' media families used by RMAN.
Does anyone have any guidelines on how RMAN volume duplication can be set up so that my duplicates are valid?
Thanks

Yes. I understand. The reason I used time-managed volumes in the tutorial is that with time-managed volumes a duplicate may have different retention and rotation than the original. The procedure for time or content managed duplicates are the same.
A content managed tape may be duplicated to the same or different media family. If to a different media family, the retention would be same...since content managed but it could have a different rotation policy...if desired. For example, if you wanted original tapes left onsite but the duplicates to go offsite for "x" time, then create a new content managed media family and a desired rotation policy...associate that rotation policy to new media family and duplicate tapes to that media family with desired rotation policy. In that scenario, your original media family would have a duplication policy and possible a rotation policy. The new media family would just have a rotation policy.
Donna

WHAT IS BEST STRATEGY FOR RMAN BACKUP CONFIGURATION

Hi all,
my database size is 50GB I want TAKe WEEKLY FULL BACKUP AND INCREMENTAL BACKUP
WITHOUT RECOVERY CATALOG.by follwing commands
weekly full database backup
run
backup as compressed backupset
incremental level=0
device type disk
tag "weekly_database"
format '/sw/weekly_database_%d_t%t_c%c_s%s_p%p'
database;
I want do CONFIGURE RMAN BY FOLLWING stragtegy
CONFIGURE RETENTION POLICY TO REDUNDANCY window of 14 days.
CONFIGURE BACKUP OPTIMIZATION OFF;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO
'\SW\AUTOCFILE_'%F';
and other is by default
sql>alter system set control_file_record_keep_time=15 days;
os--aix6 and for two database 10g2 and 11g2
what is best configuration strategy for rman backup.AND BACKUP WITH RECOVERY CATALOG OR WITHOUT RECOVERY CATALOG
PLEASE TELL ME
Edited by: afzal on Feb 26, 2011 1:45 AM

For simply two databases, there really wouldn't be a need for a recovery catalog. You can still restore/recover without a controlfile and without a recovery catalog.
From this:
afzal wrote:
CONFIGURE RETENTION POLICY TO REDUNDANCY window of 14 days.I am assuming you want to keep two weeks worth of backups, therefore these:
alter system set control_file_record_keep_time=15 days;
CONFIGURE RETENTION POLICY TO REDUNDANCY window of 14 daysShould be:
RMAN> sql 'alter system set control_file_record_keep_time=22';
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14;22 would give you that extra layer of protection for instances when a problem occurs with a backup and you want to ensure that data doesn't get aged out.

I am trying to confirm the time at which a particular backup occurred using an external hard drive that I have since misplaced. Although time machine lists the backup times for some backups, it does not list them for all. Can someone help?

I am trying to confirm the time at which a particular backup occurred using an external hard drive that I have since misplaced. Although time machine lists the backup times for some backups, it does not list them for all, including the one in question. Can someone help?

Okay, I've sussed it. I saw a link to another discussion that hadn't turned up in any of my searches before I posted the question above.
My Tosh HDD was formatted to FAT 32 and therefore would not be backed up by Time Machine. I removed all data from it - nightmare as I hadn't enough space to put it on the macbook HDD, but, after trawling through numerous photos and deleting rubbish for hours, I finally made enough space and copied all data across. Then, after clearing the data from the Tosh HDD, I used disk utilitity to reformat it to Mackintosh OS Extended. Chose the option without kournalling because I'm not baking up onto this disk and so don't need it - according to some other discussions I found.
When it was done I check on time machine in system prefs and once I selected options, I was able to remove it from the excluded from backups list. Hey presto. Now I'm moving my photo library and my music library onto the Tosh HDD and my macbook should start to breath again. Hurray.

How to estimate recovery time from rman backup

how to estimate recovery time from rman backup?
The database is of size 800GB.
the approximate time to backup is 8- 10 hours.

"Recovery time" is : RESTORE DATABASE time + RECOVER DATABASE time.
RESTORE can be done
a. in parallel with multiple channels if your backup was created as multiple backupsets
b. using incremental backups
c. whether the backups are on
i. disk
ii. tape
Alternatively, if you have a Recovery Area with an Incrementally Update backup of the database, you can SWITCH DATABASE almost immediately
RECOVER depends on
a. how many archivelogs (in terms of size, not necessarily number) need to be applied
-- this depends on
i. transaction volume
ii. the "freshness" of the backups (how recent the backups are)
b. whether required archivelogs are available on disk (which can be the case if the database backup itself is a very recent backup and archivelogs since then haven't been deleted {whether they have been backed up or not}) OR whether they need to be restored from
i. disk backup
ii. tape backup

Choice a remote drive for RMAN backup

I want to use my AIX (OS 5.3L) as a remote server for RMAN backup, under the 10g R2. The two most likely drives that still has lots space are hdisk1 and hdisk3. However, the hdisk1 is in rootvg with my test Oracle 10g appl on. Although the hdisk3 is in appvg and but it is the data storage for oracle of local machine. Both drives are quite busy based on the memory monitor and iostat. so How to make a choice for which drive is more proper as a remote drive?

As i play more with the NFS on AIX, i noticed more about the user/group attributes of the files and directory. Mainly, they are different on either side, even more strangely that the new file created on the server side has different user/group attribute , not as oracle/oinstall of original (client side) It worries me whether there will be problem when RMAN does the recovery later.
Secondly, the NFS only allows to write into one level of the directory, which is assigned NSF. As I know, the whole RMAN backup creates backupset files at several levels down from my flash_recovery_area.
Message was edited by:
user508054

Shell script for RMAN backup

Hi,
on 10G R2 in AIX 6.1
I'm looking for Shell script for RMAN backup.
Moreover , if we should connect like this :
rman nocatalog target sys/password@myDB << EOF
backup as compressed backupset format '$savdir/ctl_%d_%T_%s_%p' current controlfile;
exit
EOFHow to avoid writting password in shell script ?
Thank you.

user522961 wrote:
Can you please tell me in case of having a catalog , how to connect to catalog without writting password in script ? I mean , how to write the following in a way without password :
#!/usr/bin/ksh
export ORACLE_SID=myDB
ORACLE_ENV_ASK=NO
. /usr/local/bin/oraenv
export savedir=/backups/myDB
rman target / << EOF
connect catalog rman/password@myrepository
backup as compressed backupset
format '$savdir/ctl_%d_%T_%s_%p'
include current controlfile;
exit
EOF:p

Reducing time for rebooting

Hi experts,
iam using the torch 9860 handset,it taking long time for rebooting please help me in reducing the time.
It's almost 3 to 5 mins to reboot.
Thanks &. Regards,
Karthik.m

use latest OS and dont keep tons of stuff on media card
or do like i do and Reboot it prior to going to bed and it should be fine when you wake up
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Steps to reducing time for loading of data

Hi
Could any one tell me how to reduce the time for loading of records into a particular cube or Ods. For ex: iam loading some 1 lac records.It was taking for me some 5 hrs. I want to reduce the time to 3hrs or 4hrs.What are the very first steps to be considered to make fast.
Regards
Ajay

Hi Ajay,
Check the following.
1> Any routine you have in transfer rule and update rule should not fire database select more then one time in the same code.
2> Load Master data before transaction data.
3> Reduce the data pack size in infopackage.
4> Delete old PSA because you may space issue while data loading .
5> If you are loading in ODS then remove Bex check in ODS maintenance screen if you are not doing report on that ODS.
hope this will help you.
Suneel

User Permission for RMAN Backups

Oracle 10g Database Enterprise Edition R 10.2
I have created a user admin and i want to run backups from admin user. Kindly let me know what user permissions i have to grant for rman successful backups?
Thanks!

The rman "client" executable must connect to the Database AS SYSDBA.
Therefore, technically it doesn't require a separate user account in the target database, although you could setup a user, grant SYSDBA to the user and have remote_login_passwordfile configured to allow connections.
Hemant K Chitale
http://hemantoracledba.blogspot.com

Write a ms dos script for rman backup

Hi all,
i wanna write a dos batch file to take the rman backup..
i have written one...actually there are 2 files. one is for login purpose...other one is for sql commands
rman.bat-->
rman target sys/sysadmin@hnbhrm @'c:\rm.sql'
==============================
rm.sql-->
configure retention policy to recovery window of 7 days;
configure controlfile autobackup on;
run {
alter system switch logfile;
crosscheck archivelog all;
crosscheck backupset;
backup database plus archivelog;
DELETE NOPROMPT ARCHIVELOG ALL COMPLETED BEFORE 'sysdate -1';
DELETE NOPROMPT OBSOLETE REDUNDANCY = 1;
========================================
but i have problem in first file rman.bat. it doesnt run at all. but if i write sqlplus / as sysdba instead of rman thing.. then it works fine.
can anybody tell me whats happening over there please..? Have i done this correctly? or u have some other simple way to do this...
both files are located in C drive.. and oracle is installed to E drive... oracle path has set already.
can anybody please give me a hand to solve this issue please...
Thanks in Advance,
Max

write a ms dos script for rman backupImpossible. rman does not support MS-DOS. It is not a 16bit real mode application that can be run inside the MS-DOS operating system.
So get your terminology straight - the Windows console is a character based 32bit virtual machine. It is not MS-DOS. It never was MS-DOS. Do not confuse the two simply because of superficial similarities. A stick-it note can be yellow - but because it is yellow does not mean it is a banana.

Script for RMAN backup

kindly send the script for RMAN bacup

Hi,
About RMAN backup
http://dbataj.blogspot.com/2007/01/about-rman-backups.html
About RMAN architechture
http://dbataj.blogspot.com/2007/01/recovery-manager-architecture.html
About RECOVERY CATALOG
http://dbataj.blogspot.com/2006/12/recovery-catalog.html
RMAN backup script
http://dbataj.blogspot.com/2007/01/hotfullrmanbkpscirpt.html
above is my own work on RMAN you have to edit according you needs.
regards
Taj

DBID for RMAN backup with format '%u'

Hi all:
(I've post this at c.d.o.s. too, but no answers...)
This is Oracle 10.2.0.3 on Enterprise Linux 5.
I've been given two backups from an Oracle Database: one 'cold' and
one 'hot'. They both come from a lost server.
The fact is that they have been made with the format '%u' (eight
alphanumerics) and I must recover the database on a new server. I
cannot get the DBID from the backup files name because of this format
'%u'.
The backups have been made with CONTROLFILE AUTOBACKUP ON (or so I'm told).
How can I get the DBID to recover the DB on a new server?
Thanks in advance.
Cheers.
Carlos.

"I don't know where you read this, it's wrong. "Oracle® Database Backup and Recovery Advanced User's Guide
10g Release 2 (10.2)
2 RMAN Backups Concepts
Control File and Server Parameter File Autobackups
How RMAN Performs Control File Autobackups
"The RMAN behavior when the BACKUP command includes datafile 1 depends on the CONFIGURE CONTROLFILE AUTOBACKUP setting. If control file autobackups are ON and the backup includes datafile 1, RMAN writes the control file and SPFILE to a separate autobackup backup set. If control file autobackups are OFF and the backup includes datafile 1, then RMAN includes the current control file and SPFILE in the same backup set as the datafiles."
Cheers.
Carlos.

How to reduce time for gather statistics for a table.

I have a table size 520 gb
Its one of the partition size is 38 gb
and total indexes of related table is 412 gb.
Server/instance details.
==========
56 cpu -> Hyper threading enable
280 gb ram
35 gb sga
27 gb buffer cache
4.5 gb shared pool size
25 gb pga
undo size 90gb
temp size 150 gb
Details :
exec dbms_stats.gather_table_stats('OWNER','TAB_NAME',PARTNAME=>'PART_NAME',CASCADE=>FALSE,ESTIMATE_PERCENT=>10,DEGREE=>30,NO_INVALIDATE=>TRUE);
when i am firing this in an ideal time when there is no load that time also is is taking 28 mins to complete.
Can anybody please reply me how can we reduce the stats gather time.
Thanks in advance,
Tapas Karmakar
Oracle DBA.

Enable tracing to see where the time is going.
parallel 30 seems optimistic - unless you have a large number of discs to support the I/O ?
you haven't limited histogram collection, and most of the time spent of histograms may be wasted time - what histograms do you really need, and how many does Oracle analyse for and then discard ?
Using a block sample may help slightly
You haven't limited the granularity of the stats collection to the partition - the default is partition plus table, so I think you're also doing a massive sample on the table after completing the partition. Is this what you want to do, or do you have an alternative strategy for generating table-level stats.
Regards
Jonathan Lewis

Reduce Time for Rman Backup

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