Sam,
We do not currently use our ESS for larger than  model 3s
We define every linear data set for both storage pool and database volumes to
use 100%
of a model 3.
We also use file volumes for database snapshot and for backupsets. These are
defined at 2gb.
We do not have much of an issue with device delays with this scenario. Our
problem is getting enough cpu to stress the i/o
I too would be interested to hear the  experience of anbody using the larger
device sizes.
regards,
John




Sam Sheppard <shs AT sddpc.sannet DOT gov> on 06/11/2003 12:04:48 AM

Please respond to "ADSM: Dist Stor Manager" <adsm-l AT vm.marist DOT edu>

To:   adsm-l AT vm.marist DOT edu
cc:    (bcc: John Naylor/HAV/SSE)
Subject:  OS/390 volume sizes



We are installing an ESS in the next couple of weeks and I'm interested
in any recommendations anyone has on appropriate volume sizes for the
database and storage pools on this device.

Currently, we are OS/390 V2.10 with everything on an RVA2 with 3390-3
device sizes.  With the ESS, you can go up to 'mod-27' sizes.  Any
guidelines out there for mod-3 vs. mod-9 vs. bigger would be
appreciated.

Thanks,
Sam Sheppard
San Diego Data Processing Corp.
(858)-581-9668







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