ADSM-L

Re: TSM diskpool on SATA

2006-06-16 15:34:54
Subject: Re: TSM diskpool on SATA
From: "Allen S. Rout" <asr AT UFL DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 16 Jun 2006 15:34:09 -0400
>> On Fri, 16 Jun 2006 11:18:26 -0500, John Monahan <JMonahan AT COMPURES DOT 
>> COM> 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".   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.


How many striped lvs did you end up with?  I have hesitated about
making big striped LVs out of fear that I'll bottleneck my clients
because I'll only have "a few" threads free to process data.
Consequently, my striping has been in terms of defining N DISK volumes
per stgpool, where N is the number of underlying RAIDs.

But that is a pain in the patoot in many ways, especially for
reorganization.

I've considered making a bunch of striped LVs (as in, a hundred or so)
and doing it that way, but I figured that would add up to thrashing
the heads.


- Allen S. Rout

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