Wanda,

We start backups in earnest at 10pm.  At that time, all of our 206 virtual 
drives are busy.  So we don't worry about balancing across HBAs.  They all have 
I/O on them.

David

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Prather, Wanda
Sent: Monday, October 13, 2014 12:29 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Load balancing when you have many virtual tapes?

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>  |  
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