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Backup


Backup

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moonlight
moonlight
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Hi

I am new in sql server.
I am confused with the backing up process ,when we do a Diff. backup does it backup from ldf. file or just mdf?What a bout Full and Log backup?
Does the ldf file only contain transaction log?

Could anyone please give me some resource to read more about it?
GilaMonster
GilaMonster
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A differential backup is a backup of the data changes since the last full backup. It's a data backup, not a log backup, so mostly the data file with enough log to restore consistently.

The ldf is the transaction log.

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
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MJ-1115929
MJ-1115929
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Hi,

This link will help you understand all the backup types of sql server in detail.

http://technet.microsoft.com/en-us/magazine/2009.07.sqlbackup.aspx

Thanks & regards
MJ
PravB4u
PravB4u
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go through below article to get an idea about SQL backups.

http://www.mssqltips.com/sqlservertutorial/6/types-of-sql-server-backups/



Praveen D'sa
MCITP - Database Administrator 2008
http://sqlerrors.wordpress.com
moonlight
moonlight
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Sorry ,so " with enough log to restore consistently" means from ldf?
GilaMonster
GilaMonster
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It means enough of the transaction log so that the restore can recreate the database in a transactionally consistent way. Don't worry about what from what file, just focus on what the backups do in terms of the database.

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


moonlight
moonlight
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Thanks to all
It was so helpful :-)
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