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ActiveSync vs. Blackberry

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ActiveSync vs. Blackberry - 22.Dec.2008 3:41:14 PM   


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Joined: 4.Sep.2008
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In presenting a business case for moving from ActiveSync to Blackberry Enterprise Server questions have been raised regarding the peformance impact that BB has on the Exchange 2007 mailbox server database disk. Most documentation supports the claims that required IOPs for a Blackberry user increases by 2-4x's. A number of questions spring from that.

1. If those numbers are correct, why the increase? What is BES doing that would cause that sort of performance hit?

2. Are those numbers comparing BB vs. a normal MAPI user or BB vs an ActiveSync user?

3. Is there any documentation that outlines that actual performance impact on the backend Exchange 2007 mailbox database when using ActiveSync?
I know these are a lot of questions but, it has been a struggle to find definite answers.

Thanks in advance for your help.
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RE: ActiveSync vs. Blackberry - 22.Dec.2008 3:55:56 PM   


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Joined: 9.Jun.2004
From: Philadelphia PA
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1. That's documented in the BlackBerry whitepapers and support forums you'll have been looking at as part of your business case preparation. It's ugly, but it's what it is. IIRC, the newest version of the BES helps a lot so if you're planning on implementing next year you should probably ignore what you've been reading and look at the new metrics as and when released.

2. They would be per MAPI connection, nothing to do with an Outlook client or an actual WM device, both of which generate one, or more, connections.

3. The performance impact between the CAS and the MB for a WM device is less than for an Outlook client, depending on the connection method. If you're doing As Items Arrive it'll be heavier. Look at TechNet for that information.


Mark Arnold (Exchange MVP)
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