RE: Dual or Quad for 4000 users

  • From: "Teo De Las Heras" <teoheras@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 7 Mar 2006 12:25:10 -0500

The number I was given per user is .6 (It's my first week).  I put a plan
in-place to get data that will validate this (or increase it??).  With 200
MB mailboxes I think synchronization and Blackberry might push this number
higher.

Teo


On 3/7/06, Michael B. Smith <michael@xxxxxxxxxx> wrote:
>
> http://www.MSExchange.org/ <http://www.msexchange.org/>
>
> And what is the calculated IOPS per user?
>
>
>
> Basing on what I know about other large deployments, I would guess that
> you are probably OK assuming your disk subsystem can meet the IOPS load.
>
>
>
> In the general case, as I'm sure you know, Exchange is I/O bound, not
> processor bound.
>
>
>
> Are you going to have a dedicated bridgehead server plus a couple of FE
> servers? Seems like that would be a good idea too in this size of
> deployment.
>
>
>  ------------------------------
>
> *From:* Teo De Las Heras [mailto:teoheras@xxxxxxxxx]
> *Sent:* Tuesday, March 07, 2006 10:04 AM
>
> *To:* [ExchangeList]
> *Subject:* [exchangelist] RE: Dual or Quad for 4000 users
>
>
>
> http://www.MSExchange.org/ <http://www.msexchange.org/>
>
> 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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