RE: SAN and Performance

Assuming you use 16GB cards you should see a definite improvement in I/O
performance. To be sure use one of the modeling tools available. Your
business partner should be able to get MPG to model it for you at no cost
(IBM pays for it)

The trick is to get the SAN properly sized in the first place. You need to
know the IOPS rate to match it to the proper san model.


--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Gad
Miron
Sent: Wednesday, November 22, 2017 10:57 PM
To: midrange-l@xxxxxxxxxxxx
Subject: SAN and Performance

Hi Larry

Considering a new machine configuration...

Will SAN upgrade / degrade performance of Write-intensive applications ?
(Compared to 7TB internal disks?)

TIA
Gad

date: Wed, 22 Nov 2017 16:01:15 -0500
from: DrFranken <midrange@xxxxxxxxxxxx>
subject: Re: i hosting i question

Sure VIO can do that but SAN better choice.
You get things like easy tier to move hot data to SSD and cold data away.

You get flash copy for doing backups at a point in time that's not
stuck while you are doing the backups.

You can add drawers on the fly unlike internal disk. There are also
more disk options with SAN as well.

I do NOT hate internal disk, reliable and predictable for decades but
SAN disk brings options that internal doesn't.

18TB, I'd be on SAN for sure.


- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

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