In <bitnet.adsm-l%199510270254.TAA08694 AT eng3.sequent DOT com>, rosav AT 
sequent DOT com (Rosa Voncina) writes:
>Hi,
>
>I have been reading some of the notes about Oracle (and Database in general)
>backup strategy with ADSM.
>
>I am very interested in understanding how ADSM performs in this area.
>
>My understaning thus far is that ADSM DOES HOT backup of Databases but that
>the Database has to be in File Systems. Is this correct ?
>
>Our main concern is to MEET certain REQUIREMENTS for the Backup/Restore
>window and thruput.
>
>I need to backup and restore (600GB Q4/95 and 6TB by Q496) of Database in
>about 4-6hrs. This is HOT and COLD backups. We can use any peripherals that are
>needed to accomplish this rate OR as many as a platform can attach, i.e.
>several 4mm libraries, DLT libraries, IBM Libraries with 3590 drives.
>The Database is currently stored in raw partitions but it could also be in
>File Systems as well. Can ADSM do the job ?
>
>The Key question is How SCALABLE is ADSM ? Does anyone have significant
>experience in Backing UP LARGE Oracle Databases with ADSM that can share some
>info (off-line if needed).
>
>Knowing that File System Performance can vary from platform to platform and
>from different File System Types, if we assume that a particular UNIX platform
>has excellent File System Performance, what are (if any) the botlenecks of 
>ADSM.
>Can we count on ADSM streaming all tape/optical drives ?
>
>Is there any performance pubs for ADSM on UNIX platforms for DATABASE BACKUPs ?
>
>Thanks in advance.
>
>--
>Rosa O. Voncina (rosav AT sequent DOT com)
>Manager, Clustered Systems - Backup/Recovery
>Sequent Computer Systems
>(503) 578-4594 (Work)

I think ADSM is a terrific product but I can't imagine it meeting your
severe time window.  My guess is that only high speed tape drives directly
attached to the database machines could reload bulk dumps that fast.
You should test bulk dump reloads as a baseline before looking into more
sophisticated solutions.

Bill Colwell
C. S. Draper Lab
Email: BColwell AT draper DOT com
Voice: 617-258-1550