@VM.MARIST.EDU
Subject: Re: TSM diskpool on SATA
On Tue, 20 Jun 2006 15:06:17 -0500, Mark Stapleton
[EMAIL PROTECTED] said:
I would *never* use a SATA pool for a primary TSM storage pool.
Allen the Pedant simply has to chime in on this.
I'm actually contemplating a SATA pool for a large
On Jun 20, 2006, at 4:05 PM, Laurent Bendavid wrote:
I remember that it's some limitation with DISK devclass for restore
purpose. It was a good IBM presentation about disk oriented backup
with good advice but I don't succeed to find the URL (TapelessTSM).
You may be thinking of IBM Technote
Nachricht-
Von: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Im
Auftrag von John Monahan
Gesendet: Dienstag, 20. Juni 2006 21:35
An: ADSM-L@VM.MARIST.EDU
Betreff: Re: TSM diskpool on SATA
Did you do any FILE devclass work? It sounds as though
your miserable
performance
On Tue, 20 Jun 2006 15:06:17 -0500, Mark Stapleton [EMAIL PROTECTED] said:
I would *never* use a SATA pool for a primary TSM storage pool.
Allen the Pedant simply has to chime in on this.
I'm actually contemplating a SATA pool for a large chunk of primary
storage right now. However, this
@VM.MARIST.EDU
Subject: Re: TSM diskpool on SATA
On Tue, 20 Jun 2006 15:06:17 -0500, Mark Stapleton
[EMAIL PROTECTED] said:
I would *never* use a SATA pool for a primary TSM storage pool.
Allen the Pedant simply has to chime in on this.
I'm actually contemplating a SATA pool for a large chunk
On Wed, 21 Jun 2006 12:06:22 -0400, Prather, Wanda [EMAIL PROTECTED]
said:
I've worked with some SATA disk that drop to as low as 8MB/second
after you exceed the cache read ahead/flush capacity (and that's on
READ I/O, not even writes!).
Amen. Preach it, sister.
- Allen S. Rout
- Has
Thing is, even all SATA is not created equal. Before you decide you can
put PRIMARY disk on SATA, ask about SUSTAINED throughput rates.
If your data needs to go SOMEWHERE ELSE (like get copied or migrated to
tape) from the SATA disk, think carefully. If you're talking a LOT of
data, think
See performance studies such as:
http://www.byteandswitch.com/document.asp?doc_id=82526print=true
to see how SATA performs, particularly as I/O sizes vary.
Richard Sims
Bug your EMC rep for Backup to disk guide with IBM Tivoli Storage
Manager. Though, you're already doing most of their recommended
practices.
They claim that Lab testing had shown that Solaris and AIX may
perform slower than other operating systems, which is amusing /
irritating.
I did
On Tue, 20 Jun 2006 10:08:59 -0500, John Monahan [EMAIL PROTECTED] said:
I did find and read that guide, although the information now seems a
little dated (10/20/2003). It looks like it hasn't been updated
since EMC came out with their own VTL, which would make sense if
they are pushing
Did you do any FILE devclass work? It sounds as though your miserable
performance was head thrashing, which we'd get in multiple LV DISK
devclasses, and also in FILE devclasses. Darn. :)
No I was using a DISK devclass, but I'm almost positive it wouldn't have
made any difference with FILE
@VM.MARIST.EDU
Subject: Re: [ADSM-L] TSM diskpool on SATA
Did you do any FILE devclass work? It sounds as though your miserable
performance was head thrashing, which we'd get in multiple LV DISK
devclasses, and also in FILE devclasses. Darn. :)
No I was using a DISK devclass, but I'm almost
John Monahan a écrit :
Did you do any FILE devclass work? It sounds as though your miserable
performance was head thrashing, which we'd get in multiple LV DISK
devclasses, and also in FILE devclasses. Darn. :)
No I was using a DISK devclass, but I'm almost positive it wouldn't have
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of
John Monahan
Hundreds of LVs with FILE devclasses on fibre disks would probably do
exactly what you are looking for and provide excellent performance.
SATA just isn't good enough at multiple, simultaneous I/Os to the same
set
ADSM: Dist Stor Manager ADSM-L@VM.MARIST.EDU wrote on 06/20/2006
03:05:47 PM:
John Monahan a écrit :
Did you do any FILE devclass work? It sounds as though your miserable
performance was head thrashing, which we'd get in multiple LV DISK
devclasses, and also in FILE devclasses. Darn. :)
I'll share my experiences with primary TSM diskpool on SATA drives for the
list, since this subject is becoming more common lately.
Environment:
TSM 5.3.4.0, AIX 5300-04-03, 1 CPU 4GB RAM LPAR on a p570
2 HBAs for disk, 1 HBA for 2 LTO3 drives
Backup is roughly 650GB nightly and will more than
On Fri, 16 Jun 2006 11:18:26 -0500, John Monahan [EMAIL PROTECTED] said:
I'll share my experiences with primary TSM diskpool on SATA drives for the
list, since this subject is becoming more common lately.
[...]
Bug your EMC rep for Backup to disk guide with IBM Tivoli Storage
Manager
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