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 basic back up and recovery concept?

Author  Topic 

briankind
Starting Member

17 Posts

Posted - 2009-07-25 : 02:03:08
full
differential
logs transactional

what is the difference between differential vs logs transactional?
why do we need it?

can you just set up one full everyday? is this good?
beginnerBrian

GilaMonster
Master Smack Fu Yak Hacker

4507 Posts

Posted - 2009-07-25 : 04:27:28
One full every day's fine for a dev system where the DB is in Simple recovery and there's no worries about losing a day's data if the database fails. For a production database that may have rules about exactly how little data may be lost (10 min, 1 hour), you generally need full recovery model and frequent log backups to do point in time recovery.

Start by reading Books Online (the SQL help file) on backups and recovery models.
Also, you can read this: [url]http://www.sqlservercentral.com/articles/64582/[/url]

--
Gail Shaw
SQL Server MVP
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sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2009-07-25 : 20:55:51
Similar post:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=130026
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laddu
Constraint Violating Yak Guru

332 Posts

Posted - 2009-07-27 : 13:41:20
what is the difference between differential vs logs transactional?

Full backups creates a stand-alone image of the entire database.
A differential backup backs up only modified extents since the last complete backup
A transaction log backup backs up all transactions since either the previous transaction log backup, or the complete database backup if there have been no transaction log backups performed for the database in the past.

why do we need it?

Backups are used for disaster recovery plan.
Using a Transaction Log backup allows you to perform point-in-time restores, so using a Transaction Log backup allows you to restore your database to any particular date and time that the Transaction Log backup covers
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