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Advice for virtualizing Exchange 2010 server roles
This article is part of the Exchange Insider issue of July 2010, Vol. 6
When virtualizing Exchange Server 2010, it's important to correctly configure virtual machines (VMs) that will host certain Exchange Server roles – otherwise a few gotchas will surface. For example, you'll need to assign the correct number of processors to the appropriate amount of RAM. This tip gives more advice for correctly configuring VMs for optimal performance. Client access and hub transport servers Even in small Exchange environments, the Client Access Server role and the Hub Transport Server role are commonly collocated with the Mailbox Server role on a single computer. For organizations with hundreds or thousands of mailboxes, this is an all-in-one configuration. Resource requirements for the CAS are usually less than what the hub transport server traditionally needs. Since every piece of mail in an Exchange Server 2010 organization flows through the hub transport server -- for routing and messaging policy application purposes -- it bears a heavy load. Microsoft states that each role should be given a minimum of 2 GB ...
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