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Exchange 2010 sizing questions

Posted on 2011-03-22
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Last Modified: 2012-05-11
Hello,

 I'm working on sizing a server environment for our new exchange 2010 environment.  We have roughly about 1000 people accessing our current 2003 server and expect that this will remain very flat on usage and growth.

In reading the docs for 2010 it looks like we need several servers to operate the new environment.  Are any of the services able to be run on the same servers like the hub transport?  If so, where would you recommend the these services be run?

 Thanks!
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Question by:sej69
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Expert Comment

by:Akhater
ID: 35190605
You can run all these services on one server, if you are happy with one server on exchange 2003 there is no reason why you will not be happy on exchange 2010.

It all goes back to

1. do you need High Availability yes or no
2. what kind of storage do you have ? SAN ? Internal disks?
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Author Comment

by:sej69
ID: 35191072
We are installing this in a virtual environment where the 2003 was on a standalone server.  So yes, we plan on high availability.  The virtual environment is running ESX 4.1 on a HP lefthand SAN.  The difficult piece is that the 3 ESX servers have only 1 that is stacked with RAM, the others are lagging substantially behind.  With this being the case, what would be the recommended structure?
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Author Comment

by:sej69
ID: 35191080
(physical RAM on ESX servers that is)  
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Akhater earned 500 total points
ID: 35193968
if you want High Availabilty you will need at least 4 servers (unless you have a hardware load balancer)

2 mailbox and 2 cas/hub
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Author Closing Comment

by:sej69
ID: 35405020
Thanks, researched it a bit more and decided to split the mailbox store fro mthe rest of the services
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