I have some issues/questions with this suggestion !

Can I assume you really ment something more reasonable like 500MB not 5GB,
since our mailbox limits are usually under 300MB ! ?

I still don't/won't have enough disk space to handle something like this !
 The backup stream would overrun the disk landing-zone (200GB) way before
it has a chance to dump it to tape !

Currently, the weekend/weekly (don't ask)  full-backups of Domino systems
is over 400GB (scattered across 5-Domino servers), spread across
Saturday/Sunday to now overwhelm the 300GB landing zone storage pool.

Very soon now, we are going to design/implement new Domino servers to
handle over 40K individual accounts (primarily using IMAP/POP/Web) so the
individual mailboxes won't get that large. But total backups over the
week/weekend will be in the hundreds of gigabytes. Currently, the old mail
system that is being replaced, is over 1TB of mail storage across
2-systems.





"Stapleton, Mark" <mark.stapleton AT BERBEE DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
08/18/2004 12:28 PM
Please respond to
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


To
ADSM-L AT VM.MARIST DOT EDU
cc

Subject
Re: Large Domino systems to LTO drives






From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On
Behalf Of Zoltan Forray/AC/VCU
>I am working on moving current Lotus Domino backups to an LTO2
>drive system since the Domino systems will be growing to 2-3TB
>in size (or more).
>
>I am looking for performance hints/suggestions/ideas,
>specifically related to Domino TDP backups !
>
>Obviously, it will have to go straight-to-tape !

Not necessarily. You will have a number of small files (mailboxes, etc.)

>I would also need to rotate/vary the DSM.OPT file being used
>for regular backups versus big-to-LTO backups.

Again, not necessarily.

Set up a new disk storage pool with a NEXTSTGPOOL definition of your
primary tape pool. Create a new domain and define all Domino nodes to
belong to that domain; set the copy destination of the copygroup of the
default management class of the new domain to the new disk pool.
(Conversely, you can create a non-default management class within the
existing domain, and use the Domino dsm.opt file to backup Domino files
using the new management class's rules.)

Set the max filesize of the new disk pool to, say, 5GB. All files that
are larger than 5GB will automatically go to the primary tape pool.

So, when the Domino node(s) backs up, all files < 5GB will go to the new
disk pool; all files > 5GB will go to the primary tape pool.

--
Mark Stapleton