Here there are DB servers with 3.8 TB oracle SAP instances on them and they
backup at a peak rate of 304-342 GB/hr.
How ?
Large client server (Sun E10K with 32 processors)
Gb ethernet
15 concurrent client sessions
client compression
goes to diskpool, not straight to tape...

Each session is able to keep a processor running at about 90+%.
Each session sees a peak transfer rate of about 5+ GB/hr of COMPRESSED
CLIENT DATA at an average of 3.8/1 compression ratio that is about 19+ GB/hr
of actual oracle data base space.
Network transfer rates run about 80-90 GB/hr but at an average of 3.8/1
compression that is the 304-342 GB/hr of actual oracle data base space.
TSM server is a 7017-S70 with only two processors and really doesn't run
that busy (30-45% maybe)
TSM server does utilize ESS storage but we see this same sort of abilities
on tsm servers using large amounts of SSA disks configured as JBOD... but we
try to limit things to one drawer per SSA loop.

Now I said peak transfer rates because at that peak rate the 3.8 TB data
base should backup in about 12.8 hours but it actually runs between 14-16
hours.

Also one can utilize 100 Mb/sec fast ethernet if they are OK with just 40
GB/hr data transfer rates that puts the backup from  14 hours to just under
24...


Dwight


-----Original Message-----
From: Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
Sent: Friday, February 21, 2003 8:34 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Anyone doing 1TB+ Backup Nightly


I do 1TB+ backups nightly which run for about 8 hours.  A large part of our
backup is a 500GB Oracle database backup to TSM.  The database backups up
over a private 1Gb connection to a AIX P660-6h1 server with 2GB of RAM and 4
processors.   The data then goes to nine 2disk stripe sets, over a 1Gb SAN
connection (I went with stripe sets because RAID5 was just to slow).  I'm
getting high iowat times on my AIX TSM server.  I'm having a hard time
pinpointing exactly where the bottleneck is at.  Currently it takes 51/2
hours to backup 500GB but I know it can be better.

My question is are any of you that are moving this amount of data faster
than me using a more powerful server like a IBM 690.

THanks
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