Saturday 7 February 2015

Exchange 2013 - compute resource calculator

Here is a set of calculators for determining compute resource requirements for Exchange 2013:

• Disk IOPS
• CPU
• Active Directory CPU cores required to support Exchange users
• RAM for Mailbox, CAS, and multi-role server (Mbx+CAS)

A note from Microsoft on the minimum requirements for RAM:

Regardless of whether you are considering a multi-role or a split-role deployment, it is important to ensure that each server has a minimum amount of memory for efficient use of the database cache. There are some scenarios that will produce a relatively small memory requirement from the memory calculations described above. We recommend comparing the per-server memory requirement you have calculated with the following table to ensure you meet the minimum database cache requirements. The guidance is based on total database copies per-server (both active and passive). If the value shown in this table is higher than your calculated per-server memory requirement, adjust your per-server memory requirement to meet the minimum listed in the table.

Per-Server DB Copies
Minimum Physical Memory (GB)
1-10
8
11-20
10
21-30
12
31-40
14
41-50
16







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