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Multi-Tenant Exchange 2010 - Database distribution

Posted on 2013-05-15
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We are starting to run a mutli-tenant exchange 2010 environment and currently running a CAS server and a separate HUB server. Both are virtulised servers using Citrix and running Windows server 2008 R2.

We have set the cas server up with separate drives for the databases and logs but for expansion planning, is there are recommended number of databases which should run on a drive before they are split over several drives? Each client is setup with their own database and would probably only have around 15 users, but are requesting quotas of 10 GB each.
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Question by:jaylaa
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Simon Butler (Sembee) earned 250 total points
ID: 39171250
Are you sure you mean CAS and not mailbox? No databases on a CAS role.

I have not seen any guidance other than what comes out of the capacity planning tools from Microsoft. You would need to monitor the server to see when the I/O and disk queues get too long and then start to move to seperate disks.

Simon.
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by:jaylaa
ID: 39173226
Thanks Simon, that server has the client access as well as mailbox roles. Only the hub transport role was moved to a separate server.

For the monitoring, would it be better using the avg disk queue length counter or the current disk queue length counter? And which counters should be monitored for the I/O?
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by:Simon Butler (Sembee)
ID: 39174516
The two counters that you have listed are the main ones to watch.
If you look in the Toolbox in EMC you will see some preset perfmon counters.

Simon.
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