AIL PROTECTED] On Behalf
Of
Allen S. Rout
Sent: Wednesday, June 21, 2006 11:29 AM
To: ADSM-L@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 po
See performance studies such as:
http://www.byteandswitch.com/document.asp?doc_id=82526&print=true
to see how SATA performs, particularly as I/O sizes vary.
Richard Sims
> 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,
>> 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. Rou
n S. Rout
Sent: Wednesday, June 21, 2006 11:29 AM
To: ADSM-L@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 h
>> 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, th
che 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
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 119
"ADSM: Dist Stor Manager" 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. :)
> >>
>
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
>
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
made
SM-L@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
> 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
>> 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 push
> 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.
>> 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 dis
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
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