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Performance

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Performance - 15.Jun.2009 1:21:34 AM   
carolchi

 

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Will publishing Exchange 2007 through ISA 2006 improve performance?
I have always done it for security reasons, but i would be interested to know if it can improve performance as well.
Post #: 1
RE: Performance - 18.Jun.2009 9:56:36 AM   
inderjeet

 

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ISA increases performance and availability for your Exchange while providing the security benefits. Since, most of the attacks are on ISA and not on Exchange so your Mail server is available and will perform well. I am not sure of any throughput benefits which you get. ISA also helps to scale up your Exchange servers by its Web farm publishing capability.

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(in reply to carolchi)
Post #: 2
RE: Performance - 18.Jun.2009 10:27:29 AM   
paulo.oliveira

 

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Hi,

in terms of performance, I can only think about cache features ISA provides for reverse proxy and web farm publishing as said by Inderjeet.

Regards,
Paulo Oliveira.

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RE: Performance - 18.Jun.2009 12:27:38 PM   
Jason Jones

 

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Reverse caching only provides limited benefit when used specifically for Exchange client access services. This is based upon the following reasons:

* A majority of the OWA content is user-specific (and changes frequently)
* All Outlook Anywhere and ActiveSync traffic is designated as 'no-cache'
* All traffic is authenticated and hence does not meet the default cache rule which is configured to prevent caching of authenticated content.

Cheers
 
JJ

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(in reply to paulo.oliveira)
Post #: 4
RE: Performance - 3.Sep.2009 1:07:09 PM   
mdriest

 

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Joined: 18.Dec.2003
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For Exchange 2003 OWA Microsoft used to recommend that you reverse cache OWA images.  I searched online and haven't found any recommendations for caching with Exchange 2007 CAS (OWA 2003 and OWA 2007).  Is anyone using ISA Server to cache OWA themes (images and css stylesheets) for an Exchange 2007 CAS Server?
 
Thank you!

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(in reply to Jason Jones)
Post #: 5
RE: Performance - 4.Sep.2009 9:50:22 AM   
Jason Jones

 

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Hi Mike,

I remember that old recommendation and used to have templated cache rules for it 

I don't this it is recommended for Exchange 2007, as none of the publishing guides talk about caching IIRC.

The text in my last post was quoted from a friend at Microsoft so I now tend to disable caching for reverse proxy deployments for Exchange web services.

Cheers

JJ

_____________________________

Jason Jones | Forefront MVP | Silversands Ltd
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(in reply to mdriest)
Post #: 6

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