• Subject: Re: Setting up ASP
  • From: dhandy@xxxxxxxxxxx (Douglas Handy)
  • Date: Fri, 15 Oct 1999 09:03:29 -0400

James,

>Geez ... it's only an example <g>

I realize that, but part of the point was one needs to do the math in
each particular case.  As I said, I wasn't necessarily knocking the
theory, if there were enough drive arms left and if there was enough
data moved to the historical data ASP.

>Actually, the drive counts were from the original post as a point of
>reference, the percentage of usage was from my own experience.  

OK, that explains where you got the 40%.  <g>

>In the real case, we doubled our total disk capacity (but not arms, due
>to drive difference) and dropped from pushing 70% to 35% utilization in
>the base ASP.

That would be much different than reducing the base ASP under 10%.

>Maybe what I'm getting to is that it's more than just the hardware
>numbers that determine if one should or should not have a separate ASP,
>but the user community and/or data base structure and demand that makes
>this kind of request an "it depends".

Moving fully half the data out of the ASP when it is used by < 5% of
the people at a time does change the perspective.  As drives have
become larger, it seems people tend to forget about arm count and only
consider storage capacity.  I think you need to consider both.

>BTW, I won't tease you too much for stating drive capacity in MB instead
>of GB, it's these types of easy mistakes that can cause someone to get
>picky with your post. <G>

Oops.  I guess it was too late to catch that.  At least the math
ratios turned out the same. <g>

>P.S. I've seen a lot of email shorthand, but never YMMV. I'm guessing:
>Your Move M... V...?  Or maybe: You Make Me Vomit?  I hope you're
>playing nice.

Your Mileage May Vary.

Meant as a reminder that these things have to be considered on a case
by case basis.  I wasn't trying to flame you.

Doug
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