Enterprise Network External SMTP servers Edge Transport Routing and AV/AS CAS Array DAG CAS MBX CAS MBX CAS MBX CAS MBX CAS MBX Layer 4LB Exchange Online Protection Mobile phone AD Web browser Outlook (remote user) Outlook (local user) Line of business application Phone system (PBX or VOIP)

Report
Enterprise Network
External
SMTP
servers
Edge Transport
Routing and AV/AS
CAS Array
DAG
CAS
MBX
CAS
MBX
CAS
MBX
CAS
MBX
CAS
MBX
Layer 4LB
Exchange
Online
Protection
Mobile
phone
AD
Web
browser
Outlook
(remote user)
Outlook (local user)
Line of
business
application
Phone system
(PBX or VOIP)
Benefits
“Considerations”
Simplified deployment & connectivity model
Increased resource usage (see managed
availability, content indexing in particular)
Cache efficiencies
Everything interacts (and workload
management mediates)
Hardware efficiencies (balanced resource
utilization)
Unified Messaging on all Mailbox servers
Benefits
“Considerations”
Stateless
Net-new role in 2013, adds performance
“cost” – can potentially mitigate by shifting
some resources from LB to CAS
Load balancing optimizations
Low CPU & memory footprint
Connection scalability
http://aka.ms/E2013Calc
For more calculator fun, check out
Tame the beast: Exchange
server calculator tips and tricks
Wednesday, 1:00 – 2:15 PM,
MR 11a
Mailbox or multi-role (Mailbox+CAS)
8GB minimum RAM
CAS
4GB minimum RAM
Minimum Disk Space (GB)
30GB
100
10
1
Exchange 2003
0.1
Exchange 2007
Exchange 2010
Exchange 2013
Database IOPS
10
1
0.1
0.01
50
100
150
200
250
300
350
400
Messages Sent/Received Per-User Per-Day
Exchange 2003
Exchange 2007
Exchange 2010
Exchange 2013
450
500
Messages sent or
received per
mailbox per day
50
100
150
200
250
300
350
400
450
500
Mcycles per User,
Active DB Copy or
Standalone (MBX
only)
2.13
4.25
6.38
8.50
10.63
12.75
14.88
17.00
19.13
21.25
Mcycles per User,
Active DB Copy or
Standalone (MultiRole)
2.93
5.84
8.77
11.69
14.62
17.53
20.46
23.38
26.30
29.22
Mcycles per User,
Passive DB Copy
0.69
1.37
2.06
2.74
3.43
4.11
4.80
5.48
6.17
6.85
http://support.microsoft.com/kb/2803754
http://support.microsoft.com/kb/2803755
Messages sent or
received per
mailbox per day
Mailbox role
memory per
active mailbox
(MB)
50
100
150
200
250
300
350
400
450
500
12
24
36
48
60
72
84
96
108
120
2GB +
2GB ×
worst−case active DBs per−server × users per−DB × mbx mcycles per−user × 0.375
per−core mcycles
Per-server DB
copies
Minimum
physical
memory (GB)
1-10
11-20
21-30
31-40
41-50
8
10
12
14
16
Dedicated Role Deployment Example
Customer
RTM Guidance
SP1 Guidance
Customer 1 23 CAS / Site
33 CAS / Site
Multi-Role Deployment Examples
Customer
RTM Guidance
Customer 2 94% CPU at peak
Customer 3 82%
Customer 4 74%
Customer 5 44%
Customer 6 42%
SP1 Guidance
102% CPU at peak
88%
80%
47%
45%
total user count
× Mailbox mcycles per−user × 0.375
CAS
server
count
in
worst
case
Per−server CAS memory = 2GB + 2GB ×
mcycles per−core

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