RE: Dual or Quad for 4000 users
- From: "Teo De Las Heras" <teoheras@xxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Tue, 7 Mar 2006 13:43:53 -0500
Michael,
You brought up a great point. I've been receiving some resistance from our
SAN engineer that dedicate IOPS per server aren't necessary because of
caching. I'm working on getting confirmation from EMC that caching should
NOT be worked into any caculations (I've never seen any that take caching
into consideration).
To be more clear on BES, not all users will be BES, but we don't yet know
what amount will be.
Teo
On 3/7/06, Michael B. Smith <michael@xxxxxxxxxx> wrote:
>
> http://www.MSExchange.org/ <http://www.msexchange.org/>
>
> So 4,000 * 0.6 = 2,400 IOPS.
>
>
>
> That equates to a LOT of spindles.
>
>
>
> Don't let ANYONE tell you that caching will help. It absolutely does not
> with Exchange and mailstores of that size. You need that IOPS in raw
> capacity. Blackberry definitely pushes the number slightly higher,
> synchronization not so much (unless you have multiple desktops synchronizing
> a single mailbox). Google desktop should be avoided by policy.
>
>
>
> Now, all that being said – 0.6 is a pretty high number for an average
> user.
>
>
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