Re: SAN and Performance

[DrFranken <midrange@xxxxxxxxxxxx>]

See Jim's response. The answer of course is "It Depends" but of course 
properly designed it will match or exceed internal disk performance. 
Poorly designed, notsomuch.

        - Larry "DrFranken" Bolhuis

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

On 11/22/2017 11:56 PM, Gad Miron wrote:
> 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.