George - Can you tell how large your stores are and your average store size? (I'm just interested in statistics. I like knowing what folks are doing on the upper-end.) Regards, Michael B. Smith MCITP:SA,EMA/MCSE/Exchange MVP http://TheEssentialExchange.com From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of GTaylor@xxxxxxxx Sent: Monday, July 14, 2008 2:42 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Cluster Basics We have 5000+ users and host them on a 2 server CCR cluster, so basically their just on one server until failover is needed. The servers are pretty heavy iron, dual quad cores with 64gig ram. The public stores are on a server of their own. (Note: Public folders cannot be on a CCR cluster.) We also have 2 load balanced CAS and 2 load balanced Edge servers. So basically we have 7 pretty healthy servers running our Exchange 2007 environment for 5000+ users and performance is great. George From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of raj nair Sent: Saturday, July 12, 2008 12:45 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Cluster Basics Hello, New to clustering. If i want to migrate my mailboxes on to a windows 2003/2007 cluster ( currently 3 exchange servers evenly hosting 4000 mailboxes and 1 hosting public folders.No cluster), how will be the cluster configuration ( like how many servers needed) . Thanks raj _____ Regional Health's mission is to provide and support health care excellence in partnership with the communities we serve. Note: The information contained in this message, including any attachments, may be privileged, confidential, or protected from disclosure under state or federal laws . If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the Sender immediately by a "reply to sender only" message and destroy all electronic or paper copies of the communication, including any attachments.