RE: Dual or Quad for 4000 users
- From: "Ion Gott" <Ion.Gott@xxxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>, "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Tue, 7 Mar 2006 11:22:55 -0800
I have seem the same issues with Blackberry as it makes many connections to the
Exchange server and forwards the message to the device. Don't have any specific
details handy but definitely should be taken into account when sizing an
Exchange environment.
Ion
<http://www.dyntek.com>
________________________________
From: Evan Mann [mailto:emann@xxxxxxxxxxxxxxxxxxxxx]
Sent: Tue 3/7/2006 9:30 AM
To: [ExchangeList]
Subject: [exchangelist] RE: Dual or Quad for 4000 users
http://www.MSExchange.org/
I've talked to a go who works at MS on the Exchange group and he says in very
large user Blackberry deployments, there is a HUGE IOPS hit on Exchange. This
was under BES 4.0, but I don't know what service pack. May want to do some
specific research into that. The BES Admin Corner on blackberryforums.com may
be worth a search.
-----Original Message-----
From: Teo De Las Heras [mailto:teoheras@xxxxxxxxx]
Sent: Tuesday, March 07, 2006 12:25 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Dual or Quad for 4000 users
http://www.MSExchange.org/
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/
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
<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/
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/
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
<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/
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/
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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