RE: Dual or Quad for 4000 users
- From: "Teo De Las Heras" <teoheras@xxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Tue, 7 Mar 2006 10:03:49 -0500
Thanks for all the responses! To be more specific, we'll be placing between
22K - 25K users on an N + 2 cluster which amounts to, at most, 4,000 users /
server (6 active servers). We've worked out the I/O profile of the user,
but I think this has more of an impact on disk utilization than processor
utilization. As far as storage though, we'll be using a CX700 with an
appropriate number of disks.
Maybe some of this information will be helpful:
- using user initiated archiving (no journaling)
- 200 MB / user (w/ quotas)
- About 25% of the clients will be OWA
- ABSOLUTELY NO BRICK LEVEL BACKUPS (Plug Ed Crowley - don't have his
website)
- Disk to disk backups which will then be written to tape
The consensus is that dual core AMD processors will be enough. I'm looking
for data that will help validate this to add to our functional design
document.
Teo
On 3/6/06, Ion Gott <Ion.Gott@xxxxxxxxxx> wrote:
>
> http://www.MSExchange.org/ <http://www.msexchange.org/>
> I would probably build a 3 node cluster (Active, Active, Passive) and
> place two thousand users on each active dual processor system and leave a
> passive system for failover. That way all eggs wouldn't be in one basket.
>
> The real issue is I/O and how busy and how heavily used mail is in the
> environment.
>
> Are clients primarily connecting through Outlook 2003 full mapi clients or
> OWA?
>
> What is the average size of the users mailboxes, will quotas be used?
>
> Is the server going to use local storage or a SAN?
>
> Ion
>
> ------------------------------
> *From:* Evan Mann [mailto:emann@xxxxxxxxxxxxxxxxxxxxx]
> *Sent:* Mon 3/6/2006 8:10 PM
> *To:* [ExchangeList]
> *Subject:* [exchangelist] RE: Dual or Quad for 4000 users
>
>
> http://www.MSExchange.org/ <http://www.msexchange.org/>
> I'm running about 1100-1200 mailboxes on a Dual Xeon 2.8ghz with 4 gigs of
> ram .
>
> Until recently, I had 400 gigs worth of stores. Right now I'm down to
> about 275gigs worth. I think this server would easily handle another
> 1500-2000 mailboxes based on the memory/cpu utilization I've seen. With
> 3.6 or 3.8ghz processors I think 4000+ users on a dual box would be fine.
>
> It should be noted this server has nothing on it except A/V and stores . I
> have a front-end server as an SMTP/POP3/IMAP/OWA gateway.
>
> -----Original Message-----
> *From:* Teo De Las Heras [mailto:teoheras@xxxxxxxxx]
> *Sent:* Monday, March 06, 2006 6:32 PM
> *To:* [ExchangeList]
> *Subject:* [exchangelist] Dual or Quad for 4000 users
>
> http://www.MSExchange.org/ <http://www.msexchange.org/> I've come across
> the rule of thumb that there should be a processor for every 1000 users.
> I've also looked at the MMB3 stats as well. My question is, what's the best
> way to determine the number and type of processors needed for 4000 users on
> Exchange 2003?
>
> Teo
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