On 07/14 12:04 , Adam Goryachev wrote:
> You could also use dd, assuming that you have some method to ensure a 
> consistent state throughout the tape backup period.
> 
> 1) Store the backuppc volume on LVM, take a snapshot and stream the 
> snapshot to tape

Tried doing this years ago. In that instance it caused a 4x performance hit.
It was better to just stop BackupPC, take a tarball of the BackupPC data
pool, then restart BackupPC. 12 hours of interruption in backups was better
than taking all weekend to write (hitchingly) to tape.

If you're writing to disk elsewhere, and your hardware differs from what I
had back then, the math may be different for you.

-- 
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com

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