[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now


Spec'ing an Exchange Server

Posted on 2004-11-15
Medium Priority
Last Modified: 2013-11-15
What is the rule of thumb for maximum # of users and Exchange 2003 Ent (assume and active/passive cluster)?
Question by:albertbr
  • 2
LVL 24

Expert Comment

by:David Wilhoit
ID: 12586907
depends on many factors; user base, type of usage, your mailbox store limits and message size limits, type of Outlook client (O2003 allows a lot more users), and type of storage device (SAN, JBOD, internal, and type of RAID) Exchange depends on disk I/Os so spindle count is paramount to performance.


Author Comment

ID: 12587004
Type of usage: heavy
Store limits: Unlimited (enterprise edition)
Message size limit: 50MB
OL Client: OL20 - OL03
Storage device: DAS/SAN (50K I/Os per sec)
LVL 24

Accepted Solution

David Wilhoit earned 200 total points
ID: 12587287
Sounds like the Clarion CX300 or CX400. Check out the Optimizing storage doc from MS:


Depending on how many users you have at peak times, and how much I/O they generate, you'll need a lot of spindles, regardless of that big cache on the SAN. 50k I/Os a sec is the optimal cache performance, not the true flush-to-disk performance. The cache can get full if you have high traffic and not enough spindles to handle it all.


Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

On September 18, Experts Exchange launched the first installment of the Help Bell, a new feature for Premium Members, Team Accounts, and Qualified Experts. The Help Bell will serve as an additional tool to help teams increase question visibility.
This month, Experts Exchange sat down with resident SQL expert, Jim Horn, for an in-depth look into the makings of a successful career in SQL.
This video discusses moving either the default database or any database to a new volume.
This video shows how to quickly and easily deploy an email signature for all users in Office 365 and prevent it from being added to replies and forwards. (the resulting signature is applied on the server level in Exchange Online) The email signat…
Suggested Courses

834 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question