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Maximum Number of servers in an Enterprise Pool Consolidated Configuration? RRS feed

  • Question

  •  

    Is it possible to add more than 4 servers in an EE Consolidated Config?  For example the Planning Guide lists the following Maximum Supported users for each Topology (see chart below).  In the EE Consolidated example, why can you not add more servers to the pool?  It seems like to go beyond 30,000 users you need to make a significant investment in more servers going with the Expanded Topology route.  Is it not possible to add 5-8 servers in a EE Consilidated Configuration to achieve scalability in increments of 7500 users which is what it seems each server supports in this config. 

     

    Same question for the Enterprise Edition Expanded configuration.  Why must you go from 4 to 8 FE servers.  Can you not simply add 1-2 more FE servers to support IM and Presence if that is all you require?  Same for the other roles? 

     

    Any thoughts?

     

     

    Topology Topology

    Servers Required Required Servers

    Maximum Users Supported Maximum Users Supported

    Standard Edition Server Standard Edition Server

    1 Standard Edition server A Standard Edition server
    (Optional) Archiving Server collocated (Optional) Archiving Server collocated

    5,000

    Enterprise pool: Consolidated Configuration Enterprise pool: Consolidated Configuration

    4 Enterprise Edition Front-End servers running all server roles 4 Enterprise Edition Front-End servers running all server roles
    1 Backend 1 Backend SQL Server SQL Server
    (Optional) 1 Archiving Server Archiving Server (Optional) 1

    30,000

    Enterprise pool: Expanded configuration Enterprise pool: Expanded configuration

    With Mid-Range Performance SQL Backend With Mid-Range Performance SQL Backend

    4 Front-End Servers 4 Front-End Servers
    2 Web Conferencing Servers 2 Web Conferencing Servers
    2 A/V Conferencing Servers 2 A / V Conferencing Servers
    2 IIS Servers 2 IIS Servers
    1 Backend SQL Server A SQL Server Backend
    (Optional) 1 Archiving Server Archiving Server (Optional) 1

    50,000

    Enterprise pool: Expanded configuration Enterprise pool: Expanded configuration

    With High Performance SQL Backend With High Performance SQL Backend

    8 Front-End Servers 8 Front-End Servers
    4 Web Conferencing Servers 4 Web Conferencing Servers
    4 A/V Conferencing Servers 4 A / V Conferencing Servers
    2 IIS Servers 2 IIS Servers
    1 Backend SQL Server A SQL Server Backend
    (Optional)2 Archiving Servers (Optional) 2 Archiving Servers

    125,000

    Wednesday, October 31, 2007 8:15 PM

All replies

  • It certainly is possible.  For example... if you're are looking at 35,500 users maximum....
     
    Enterprise Pool – Consolidated Configuration according to the referenced table...
    4 consolidated servers support up to 30,000 users  = 7,500 each
    35,000 / 7,5000 = 4.6 (4.6 servers rounded up to 5 FE consolidated servers should easily support up to 35,000 users)
    However, this solution may be streched supporting up to 37,500 users due to the diminished returns on the additional FE server.

    Increasing the number of servers beyond 4 in the EE Consolidated configuration, suggested by Microsoft, would simply incur diminished returns on performance. There is no physical limitation preventing you from adding an additional FE servers beyond the 4.

    You should be able to figure out the AV sizing in a similar manner as the FE sizing. However if you have reason to believe a specific role is going to be highly utilised you may want to move forward to an expanded configuration so you can separate the roles from the rest to ensure the load is handled appropriately.

    Hope this helps.

       

       

       

       

    Wednesday, January 21, 2009 2:59 AM
  • Hi,

    I do remember a limitation of having no more than 4 Audio/Video MCU within the same pool which would seem to suggest why the consolidated pool only has 4 servers. And why the expanded topology also has no more than 4 A/V servers.

    Also don't take the numbers as hard-coded, your mileage may vary according to your user profile. These figures come from the planning guide where Microsoft took a particular user-profile which included A/V and Web Conferencing and even Voice. If you are going to do just IM/Presence and you need to support about 50.000 users I would start by deploying a consolidated pool using 4 front-ends and see where it takes you. Closely monitor your front-end servers and SQL back-end and see if you can continue to scale.

    As soon as you notice decreased performance or that your server are not going to be able to sustain the workload you can deploy a second consolidated pool using 2 front-ends and you can continue to scale.

    At this point you might want to consider deploying a director pool as well simply to offload the existing pools from authentication requests and to have a single entry point for all your clients.


    Tonino Bruno | Belgian Pro-Exchange Community | http://www.pro-exchange.be
    Wednesday, January 21, 2009 8:52 PM