At 09:19 AM 12/6/2001 -0500, Joe Cascanette wrote:

Depending on your server setup there will be a fight for tapes. Turning
collocation ON for your onsite pools would greatly increase the time to
create backup sets. I have 4 backup sets running every 2nd day at once (I
have 10 drives which leaves 2 drive available to do restores.) I have also
noticed that you are unable to perform storage pool backups during the
creation of backup sets (it keeps canceling the process).

Since you're speaking with the voice of experience, I'm in no position to
doubt this, but at first glance, this seems counter-intuitive, or worse.
Can anyone wave their hands for a few minutes and explain why collocation
retards creating backup sets? :-)

Joe Cascanette
The Cumis Group Limited

Nick Laflamme
speaking for no one these days....

PS - each backup set will use its own tape(s), I have a PRM (and others do
as well) to correct this problem.



-----Original Message-----
From: John Naylor [mailto:John.Naylor AT SCOTTISH-SOUTHERN.CO DOT UK]
Sent: Thursday, December 06, 2001 5:36 AM

After one weekend of selective full backups increased the size of the
database by 20% , I have managed to talk management round to replacing
them with backupsets.
So all I have to do now is fit them into the available window.
So the question is, Has anyone noticed any constraints on the number of
generate backup sets that can be run concurrently, before they start
impacting on each other?
Is availability of tape drives going to be the only real constraint?
Has anyone wriiten backupsets to file devices to overcome drive shortages?
Any problems with this?
Thanks