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what is Copy-Only Backup?


what is Copy-Only Backup?

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y.koteswarrao-652921
y.koteswarrao-652921
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Hi,

What is Copy-Only backup and how does it works?

thanks
Koteswarrao
GilaMonster
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Have you looked in Books Online? I'm pretty sure the answer is in there.

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

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Perry Whittle
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Hi

copy_only is a new feature, it is basically a backup that does not interfere with the current backup chain. As Gail said, BOL does document this feature

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Robert Davis
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It's not new though.



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Perry Whittle
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let me re phrase that.

New in SQL Server 2005!

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TheSQLGuru
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Perry Whittle (8/9/2010)
let me re phrase that.

New in SQL Server 2005!


I still refer to numerous 2005 features as "new". When you have been using the product since 6.5 first came out . . . :-)

In any case, BOL is a WONDERFUL resource. I do SQL Server Relational Engine work every day and have for over a dozen years, and BOL is ALWAYS open on my desktop!!!

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Kevin G. Boles
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jasonlorraine1999
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No normal master database entries are added to aid recovery but when I run

backup database thedatabase to disk='c:\thedatabase.bak' with copy_only

I still get a up to date last backup date in database properties in SQL Server Management Studio.

Useful but could be confusing...

J
Perry Whittle
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TheSQLGuru (8/10/2010)
I still refer to numerous 2005 features as "new". When you have been using the product since 6.5 first came out . . . :-)

In any case, BOL is a WONDERFUL resource. I do SQL Server Relational Engine work every day and have for over a dozen years, and BOL is ALWAYS open on my desktop!!!


Hi Kevin

the only reason i referred to the option as new was because the OP has posted in the SQL Server 2005 forum and at this version it was a new option!

Regards

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pankushmehta
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hi Jason,

it will be in the backupset table.

however, the is_copy_only field will be 1, which confirms it is a copy_only backup.
eng_mgomaa
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Copy-only backups are new to SQL Server 2005. They allow a backup of any type to be
taken without affecting any other backups. Normally, a database backup is recorded in the
database itself and is identified as part of a chain that can be used for restore. For
example, if a full database backup is taken, any subsequent differential database backups
use this full database backup as their base. A restore process utilizing the differential database
backups would have a reference to the full database backup, and that backup would
have to be available.
Copy-only backups do not affect the restore chain. They are useful in situations in which
you simply want to get a copy of the database for testing purposes or things of this
nature. Copy-only backups are not supported via SQL Server Management Studio (SSMS)
and must be performed via the Transact-SQL (T-SQL) BACKUP command.
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