ADSM-L

Re: [ADSM-L] Load balancing when you have many virtual tapes?

2014-10-13 13:10:51
Subject: Re: [ADSM-L] Load balancing when you have many virtual tapes?
From: "Rhodes, Richard L." <rrhodes AT FIRSTENERGYCORP DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 13 Oct 2014 17:08:17 +0000
What kind of drive are they emulating?  Are they emulating IBM drives with 
Atape driver?  My understanding (I've been trusting this for years) will auto 
load balance across hba's.

Rick



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Erwann Simon
Sent: Monday, October 13, 2014 12:36 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Load balancing when you have many virtual tapes?

Hello Wanda,

As TSM allocates drives in order, you have to distribute drive between the HBAs 
in a round robin way (with 4 hba : drive 1 on hba 1, drive 2 on hba... drive 5 
on hba 1 and so on). I prefer doing this at VTL level using mapping policy (i.e 
access groups on Data Domain). 

Le 13 octobre 2014 18:28:36 CEST, "Prather, Wanda" <Wanda.Prather AT ICFI DOT 
COM> a écrit :
>TSM 7.1.1 on AIX
>So I have a customer putting in a VTL, which will have 96 virtual
>drives.
>Those virtual drives will be spread across 4 HBA's.
>
>What sort of strategies to people use to keep TSM from starting a
>BACKUP stgpool process and picking 4 virtual drives all on the same
>HBA?
>Is it dependent on the order you do your DEFINE DRIVE commands? Better
>to set up multiple virtual libraries?
>
>Any suggestions appreciated.
>
>Wanda
>
>
>Wanda Prather  |  Senior Technical Specialist  |
>Wanda.Prather AT icfi DOT com<mailto:Wanda.Prather AT icfi DOT com>  | 
>www.icfi.com<http://www.icfi.com/> | 410-868-4872 (m)
>ICF International  | 7125 Thomas Edison Dr., Suite 100, Columbia, Md
>|443-718-4900 (o)

-- 
Erwann SIMON
Envoyé de mon téléphone Android avec K-9 Mail. Excusez la brièveté.


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