RE: Backup performance

["Jones, John (US)" <John.Jones@xxxxxxxxxxxxxxxxxxxxxxx>]

On our 730, backing up an 80GB library actually took longer than the
save to tape (Ultrium2 3580-H23).  I did not, however, experiment with
saving to another ASP to see if that would have helped; our secondary
ASP isn't large enough.

Our system, though, appears to be constrained by the speed of the SPD
bus, so if you're on a PCI or better bus your results may differ.
Example: That same 730 can save about 70GB/hour to the 3580.  The 3580
on our 830 does just over 200GB/hour.

-----Original Message-----
From: Jeff Crosby [mailto:jlcrosby@xxxxxxxxxxxxxxxx] 
Sent: Thursday, January 15, 2004 9:20 AM
To: 'Midrange Systems Technical Discussion'
Subject: Backup performance

This talk about backing up \QNTC\ directories leads me to ask a question
I've been thinking about.

To reduce the backup window on the iSeries, is there anyone out there
who is backing up to disk (*SAVF) and, when the system is brought back
from a restricted state, then transferring the *SAVF files to tape?

I was curious as to whether something like this reduces the backup
window as far as restricted state is concerned.  And I know what tape
drive is used makes a big difference.  Plus backing up to a *SAVF is a
'1 library at a time' thing.

--
Jeff Crosby
Dilgard Frozen Foods, Inc.
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531

The opinions expressed are my own and not necessarily the opinion of my
company.  Unless I say so.



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