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 SQL Server Administration (2000)
 Change in Recovery mode
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anupamk
Starting Member

India
7 Posts

Posted - 03/26/2013 :  02:46:29  Show Profile  Reply with Quote
Hi,

In my Current Datawarehouse we want to change the Recovery Model from Simple to Full.

What will the impact? How the performance will be affacted. What things I need to take care of?

Thanks,
Anupam

Edited by - anupamk on 03/26/2013 03:25:44

prett
Posting Yak Master

USA
197 Posts

Posted - 03/26/2013 :  06:14:22  Show Profile  Visit prett's Homepage  Reply with Quote
Simple recovery model allows restore database only up to the last full backup, while in full recovery model, you can get point in time recovery.

You can change recovery model from simple to full as it is desirable in any production enviornment.

however, you would have to take a full backup immediately after changing recovery model from simple to full. Also, as suggested you need to perform periodic transactiong log backup based on your workload.
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jackv
Flowing Fount of Yak Knowledge

United Kingdom
2047 Posts

Posted - 03/27/2013 :  16:30:47  Show Profile  Visit jackv's Homepage  Reply with Quote
One of the impacts - is to analyse disk required and the regular backups to clear the logs.
Another impact is performance , do you have large bulk loading processes?

Jack Vamvas
--------------------
http://www.sqlserver-dba.com
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anupamk
Starting Member

India
7 Posts

Posted - 03/28/2013 :  00:18:10  Show Profile  Reply with Quote
Hi,

No, we don't have Bulk loading process in the database where we want to change recovery model. But let me know what if Bulk loading process is there?

Thanks,
Anupam
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visakh16
Very Important crosS Applying yaK Herder

India
52317 Posts

Posted - 03/28/2013 :  06:39:35  Show Profile  Reply with Quote
Bulk loading process will cause logging every transactions in full recovery model which will have huge impact on disk space, io operations etc. Its a surprise to me when you say you dont have Bulk loading process in your warehouse. Warehouse will usually have batch data loads daily. Also most of day warehouse data would be static as data loads mostly happens nightly or at the max on noontime too unless you have some real time reporting needs. So not sure why you want Recovery Model to be Full. Can you tell the reason for doing this?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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jackv
Flowing Fount of Yak Knowledge

United Kingdom
2047 Posts

Posted - 03/31/2013 :  02:35:18  Show Profile  Visit jackv's Homepage  Reply with Quote
If you are maintaining a Datawarehouse , and the data loads are once a day - and the data remains static during the day- then Recovery Model of FULL has little value.
The users typically run reports - as read - with no writes.

Jack Vamvas
--------------------
http://www.sqlserver-dba.com
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