On Tue, 31 Jan 2006, Ryan Novosielski wrote:
So, I have switched to spooling, on the advice I've seen written recently... sounds like the way to go, especially if you only have one tape drive. I expected a speed increase too, as the drive would be used more efficiently. What I did not expect is the 1000Kps speed DECREASE. Can anyone tell me why this might be? This is a Solaris 9, Sun UE450 box, 3x296 with a DAT72 drive.
Bear in mind that the data is being written to disk and then spooled to tape.
It may work out a fraction slower overall on full backups, but it's usually faster on incrementals/differentials and it really does help in terms of drive wear-and-tear
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