RE: Dual or Quad for 4000 users
- From: "Evan Mann" <emann@xxxxxxxxxxxxxxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Tue, 7 Mar 2006 10:14:05 -0500
I just took at look at my server and store.exe is only running 1.1gigs.
There is still 1.46gigs of free physical memory. Total committ
charge is around 2.1gigs. As I previous said, I have about 275gigs of
stores (6 total across 2 storage groups). I've done no "performance
tuning" to my server. E2K3 SP1 on W2K3 SP1.
CPU usage on store.exe bounces between 3-20% on average.
-----Original Message-----
From: Dave A. Marquis [mailto:dmarquis@xxxxxxxxxxxxx]
Sent: Tuesday, March 07, 2006 9:38 AM
To: [ExchangeList]
Subject: RE: [exchangelist] RE: Dual or Quad for 4000 users
I guess it depends on how you are going to set up your mail
boxes. We keep all mail on the server and have about 30 users that have
1.5Gb store limit and the rest have a 500mb store limit. The issue we
have is that exchange wants to keep the entire store in memory, which it
can't, so there are times when it chuggs on the raid to swap stuff in
and out of memory..... not the best thing in the world, but it gives us
the ability to read all email through owa.
Dave Marquis
St. Paul Radiology
Computer Systems Administrator
________________________________
From: Evan Mann [mailto:emann@xxxxxxxxxxxxxxxxxxxxx]
Sent: Tue 3/7/2006 6:45 AM
To: [ExchangeList]
Subject: [exchangelist] RE: Dual or Quad for 4000 users
http://www.MSExchange.org/
I'd agree it's probably a better idea to split that many users
across more then 1 server, just so all the eggs aren't in one basket.
To provide a little more input on my setup for reference.
I have about 250 users directly MAPI connected. Most of the
rest of them use RPC over HTTP. I probably have an average of 600-700
users connected at any given time during peak times, with a large
percentage MAPI or RPC over HTTP and a smaller chunk OWA. There is
really no POP3/IMAP4.
I have multiple RAID systems, the onboard which is split
backplane dual channel, RAID1 for the OS/Exchange, and RAID5 for Logs.
Then there is another dual channel card that runs into a Dell PowerVault
220S which is a SCSI JBOD with 2 interfaces. That's split into two
separate RAID5's. I have 1 Storage Group per array. All disks are 10K
RPM.
I havn't noticed any I/O bottlenecks to this point. Most of my
users have 75meg limits, and are always pushing those limits. All in a
single store around 105gigs in total size (with no whitespace). Then
the rest of my 275gigs of stores (or so) is spread across 5 other
stores.
I don't have any statistics on how much mail goes in/out of my
stores, but my front end see's at least 80k e-mails in/out, so I'm
fairly certain the stores see much more then that figure.
-----Original Message-----
From: Ion Gott [mailto:Ion.Gott@xxxxxxxxxx]
Sent: Monday, March 06, 2006 11:41 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Dual or Quad for 4000 users
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/
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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