Another option is to bump-up your ethernet... are you already running a
gigabit ethernet?  We've actually bumped up the TSM server and the large
unix clients to Gigabit Ethernet, and it improved the throughput of the
backup.

-----Original Message-----
From: David E Ehresman [mailto:deehre01 AT LOUISVILLE DOT EDU]
Sent: Wednesday, 10 November 2004 3:04 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Backup options


As I read your notes, Lan Free is not an option, right?  That can speed
up backups of large databases dramatically.

Assuming you're backing up over the lan, have you experimented with
compressed vs non-compressed on the client side.  Data bases typically
compress very well and its possible the time saved in transmission will
more than make up for the time spent compressing on the client.

David Ehresman
University of Louisville

>>> Bill_Rosette AT PAPAJOHNS DOT COM 11/8/2004 10:39:02 AM >>>
Hello TSM guru's

I have a backup that is 224 GB database and is growing.  It is a cold
(brings down db) backup that lasts 4 hours due to collocation and
running
straight to tape, we have a multitude of issues why we cannot run a
hot
(keep db up) backup on this particular one.  Still giving us 56 GB an
hour
not bad.  We run on a 3494 tape library hooked by SCSI straight to the
AIX
SP frame where the TSM server is.  My problem is that as it grows it
seems
to be creeping close to the kill backup window from 01:00 am to 05:10
(kill
backup time is 05:45).  I only have 300 GB of disk being used by the
other
100+ backups,  700 GB's worth.  Here are the options I gave my
superiors.

It is currently running at 55.945 GB per hour going to tape (1 tape
drive
(collocate)), pretty good for tape drive speed.
Disk would make the backup run faster with multi-streams.
Cannot go to multi-tapes due to slow recovery.
Other option would be to break the backup into 2 separate backups
running
simultaneously, probably nightmare admistrativewise.


I said I would ask y'all if I have any other options.

Please help, if anybody can.  I thank y'all in advance.

Thank You,
Bill Rosette
Data Center/IS/Papa Johns International
WWJD

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