Michael,

Regarding automation of collecting throughput performance stats directly
from SAN switches, I would suggest, although I haven't tried it, that
automation is possible through the SNMP agent on most switches. IBM
2109's, for example, I recall have a fairly comprehensive set of data
available reporting throughput per port, and an SNMP get script could
pull these stats at a given interval to a machine elsewhere on the
network. IBM/Tivoli Netview I seem to remember has performance
monitoring via MIB's in-built and can automate this fairly easily, even
displaying the data in a chart if necessary.

That being said, I'm sure there are dozens of other SAN management tools
out there which perform similar performance/stat/event gathering
functions - it's just a question of how complex they are, and how much
you'd want to pay for them!

Rgds,

David McClelland
Global Management Systems
Reuters, London

-----Original Message-----
From: Wheelock, Michael D [mailto:Michael.Wheelock AT INTEGRIS-HEALTH DOT COM] 
Sent: 08 July 2003 18:41
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [spam] Re: LTO throughput - real world experiences


Hi,

If you have fibre connected LTO drives, one really simple way is to
connect to the web console of the switch and monitor the performance of
the ports on the switch.  This isn't easily automatable, but it is a
very accurate representation of what you are seeing in terms of
throughput.

Michael Wheelock
Integris Health of Oklahoma

-----Original Message-----
From: Shawn Price [mailto:sprice AT MORRISONHOMES DOT COM]
Sent: Tuesday, July 08, 2003 12:36 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: LTO throughput - real world experiences


What is the best way to determine what your throughput is for each
process? Are you just going by the activity log?

Thanks!

Shawn

>>> cmurphy AT IDL.STATE.ID DOT US 07/08/03 1:34 PM >>>
>I'm curious as to what kind of MB/sec throughput people are seeing with
TSM
and LTO drives.

It varies drastically for us based upon the objects being moved, of
course. 10-15MB/s / drive is normal for us overall.

>How many MB/sec does a migration process produce in your environment?

We achieve about 12-14MB/s per drive when performing migration.

>Does anyone have any DB's streaming directly to LTO and some figures?
Appreciate any feedback

Yes, our Exchange boxes stream nicely at about 15MB/s per drive.

HTH!

Chris Murphy
IT Network Analyst
Idaho Dept. of Lands
Office: (208) 334-0293
cmurphy AT idl.state.id DOT us
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