Thursday, March 29, 2012

DB Backup on a compressed drive

Is this a good idea to use compressed drive (Windows NTFS compression) for DB
backup files?
What is the common practice and what are the risks?
Thanks,
Vlad
Vlad,
See http://support.microsoft.com/default...;en-us;231347.
"Performing SQL Server database backups to disk files on compressed volumes
is also not recommended."
HTH
Jerry
"Vlad" <Vlad@.discussions.microsoft.com> wrote in message
news:579552B6-8EF5-4741-8F7E-B04BF8EABEF6@.microsoft.com...
> Is this a good idea to use compressed drive (Windows NTFS compression) for
> DB
> backup files?
> What is the common practice and what are the risks?
> --
> Thanks,
> Vlad
|||That article applies to the database files themselves, not the backups.
Personally, I prefer not to use compressed drives for backup. I prefer
using a commercial SQL backup compression tool. This decreases the time to
get the data out of SQL, thus minimizing the impact on the host system.
Since I also prefer backing up directly to a network file share, this has
the additional benefit of reducing the network traffic.
Geoff N. Hiten
Senior Database Administrator
Microsoft SQL Server MVP
"Jerry Spivey" <jspivey@.vestas-awt.com> wrote in message
news:uU8t$dWuFHA.3236@.TK2MSFTNGP14.phx.gbl...
> Vlad,
> See http://support.microsoft.com/default...;en-us;231347.
> "Performing SQL Server database backups to disk files on compressed
> volumes is also not recommended."
> HTH
> Jerry
> "Vlad" <Vlad@.discussions.microsoft.com> wrote in message
> news:579552B6-8EF5-4741-8F7E-B04BF8EABEF6@.microsoft.com...
>
|||Geoff,
From the article:
"Performing SQL Server database backups to disk files on compressed volumes
is also not recommended. The failure modes are still under investigation,
but some evidence indicates that this backup is less reliable than backing
up to regular non-compressed volumes. If backups to compressed volumes are
performed, a complete DBCC should be run before each backup and after each
restore. The time required to run the DBCC should be factored into the
decision to use this backup technique. "
Jerry
"Geoff N. Hiten" <sqlcraftsman@.gmail.com> wrote in message
news:OCyqJnWuFHA.1132@.TK2MSFTNGP10.phx.gbl...
> That article applies to the database files themselves, not the backups.
> Personally, I prefer not to use compressed drives for backup. I prefer
> using a commercial SQL backup compression tool. This decreases the time
> to get the data out of SQL, thus minimizing the impact on the host system.
> Since I also prefer backing up directly to a network file share, this has
> the additional benefit of reducing the network traffic.
> --
> Geoff N. Hiten
> Senior Database Administrator
> Microsoft SQL Server MVP
> "Jerry Spivey" <jspivey@.vestas-awt.com> wrote in message
> news:uU8t$dWuFHA.3236@.TK2MSFTNGP14.phx.gbl...
>

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