EDIT 5/30/2008: The content of this article has since been published in our official Exchange documentation. Please go here for the most updated version.
As part of a broader investigation, we measur...
Updated Jul 01, 2019
Version 2.0
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What about SCCP 2007 and Exchange 2007 model? What formula is used in capacity planner Exchange model? When I put nubers from above example with "Average" profile and 10,000 users with OL2007 cached scenario, I got total (down+up) wan load of ~3Mbps. I suspect that OWA logon/logoff 2 times per day can increase the the bandwidth, but can it be 5 times more?
Here are my settings:
Mailbox site: Everything goes by default (1 local client, OL2007 cached, Average usage 100%)
Client only site: Local client count=10,000, everything goes by default (1 local client, OL2007 cached, Average usage 100%)
Bandwidth: site to site 11 Mbps, % Available - 100%
Using default "Average" usage model:10 sent, 40 received, 50K size, peak factor - 2
Results: Wan utilization Downlink - 26,73%, Uplink - 1,01%, so Total - 27,74%
So if we take 11Mbps link and 100% available, consumed traffic would be 11*0,2774=3,05 Mbps (including peak factor)
This value is 5 times less than 15Mbps.
So who is right?
Here are my settings:
Mailbox site: Everything goes by default (1 local client, OL2007 cached, Average usage 100%)
Client only site: Local client count=10,000, everything goes by default (1 local client, OL2007 cached, Average usage 100%)
Bandwidth: site to site 11 Mbps, % Available - 100%
Using default "Average" usage model:10 sent, 40 received, 50K size, peak factor - 2
Results: Wan utilization Downlink - 26,73%, Uplink - 1,01%, so Total - 27,74%
So if we take 11Mbps link and 100% available, consumed traffic would be 11*0,2774=3,05 Mbps (including peak factor)
This value is 5 times less than 15Mbps.
So who is right?