land
Global Management Systems
Reuters, London
-Original Message-
From: Wheelock, Michael D [mailto:[EMAIL PROTECTED]
Sent: 08 July 2003 18:41
To: [EMAIL PROTECTED]
Subject: [spam] Re: LTO throughput - real world experiences
Hi,
If you have fibre connected LTO drives, one really simpl
>What is the best way to determine what your throughput is for each process?
Are you just going by the activity log?
I have measured it a couple of ways. As many have said, from the switch
ports is an excellent (though manual) process. Be warned there is a slight
FC overhead on every frame, and
Gerald,
I am glad you asked this question as I was thinking of posting a similar
question myself.
Here is our configuration:
IBM F50 4-way
AIX 4.3.3 ML 11
1 GB RAM
Overland Neo 4000 library with 4 Seagate LTO-1 drives, hardware compression
on 2 6205 Ultra2 SCSI Interface cards (2 drives per/port
Another comment... LTO numbers should probably be reported as being
LTO-1 or LTO-2.
LTO-1 max uncompressed is 15 MB/sec, max compressed is 30 MB/sec; LTO-2 max
uncompressed is 35 MB/sec, max compressed is 70 MB/sec. This assumes a
typical average compression ratio of 2:1, of course.
We use tapeut
>What is the best way to determine what your throughput is for each
>process? Are you just going by the activity log?
One of the many things Servergraph/TSM (http://www.servergraph.com)
will report for you is thoughput rates for the various TSM processes.
David Ehresman
University of Louisville
Hey, good tip.. I'll check that one out.
Thanks!
Shawn
> From: "Wheelock, Michael D" <[EMAIL PROTECTED]>
> Reply-To: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
> Date: Tue, 8 Jul 2003 12:40:52 -0500
> To: [EMAIL PROTECTED]
> Subject: Re: LT
chael Wheelock
Integris Health of Oklahoma
-Original Message-
From: Shawn Price [mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 08, 2003 12:36 PM
To: [EMAIL PROTECTED]
Subject: Re: LTO throughput - real world experiences
What is the best way to determine what your throughput is for each pr
par : "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
Pour : [EMAIL PROTECTED]
cc :
Objet : Re: LTO throughput - real world experiences
>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
What is the best way to determine what your throughput is for each
process? Are you just going by the activity log?
Thanks!
Shawn
>>> [EMAIL PROTECTED] 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
>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 a
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