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Saturday, April 28, 2012

Exchange 2010 servers sizing recommendations

For all who are involved in Exchange 2010 sizing you can find here a detailed guidelines about the ratio of Hub/CAS and Mailbox servers resources .
The basic guidelines are as follow , based on the number of processor’s cores :
Server role configuration Recommended processor core ratio
Mailbox : Hub Transport 7:1 (no antivirus scanning on Hub Transport server)
5:1 (with antivirus scanning on Hub Transport server)
Mailbox : Client Access 4:3
Mailbox : Client Access and Hub Transport combined role 1:1

In addition, for Active Directory / mailbox server ratios :
  • If Active Directory is running on the x86 platform (32-bit), the recommended ratio of Active Directory directory server processor cores to Exchange 2010 Mailbox server processor cores is 1:4.
  • If Active Directory is running on the x64 platform (64-bit), the recommended ratio of Active Directory directory server processor cores to Exchange 2010 Mailbox server processor cores is 1:8
Enjoy Exchange 2010 servers sizing Winking smile