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Load balancing OCS 2007 R2 question RRS feed

  • Question

  • I'm looking at installing two servers for load balanced IM.  Management would like to be able to have one server at the main office, and one in another office down the road.  Sites are connected by a 1Gb fiber network.  Do both load balanced servers in this scenario need to connect to the same SQL server / database?  If so, would it work if the database were mirrored between the two locations?
    Friday, October 9, 2009 6:38 PM

Answers

  • For that scenario you'll need to use a Hardware Load Balancer in front of a pair of Enterprise Edition Front-End Servers.  Since you can only balance servers in the same pool then each server would need to be connected to the same SQL database instance.

    An alternative method would be to separate two separate single-server pools at each location and then use a balance of SRV records (for Automatic client Configuration) and GPO-pushed settings (for Manual Configuration) to point clients (assuming you are using the same SIP domain for all users) to their local OCS server/pool Front-End.

    Which approach to use depends on the amount of users per site (even or unbalanced) and if you don't want to mess with SQL clustering and purchasing HLBs.

    Take a look at the OCS 2007 R2 Site Resiliency White Paper for more details on load balancing/fault tolerance scenarios:
    http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=c930febb-3a44-4bf3-969d-1c52675a7063
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Friday, October 9, 2009 7:10 PM
    Moderator

All replies

  • For that scenario you'll need to use a Hardware Load Balancer in front of a pair of Enterprise Edition Front-End Servers.  Since you can only balance servers in the same pool then each server would need to be connected to the same SQL database instance.

    An alternative method would be to separate two separate single-server pools at each location and then use a balance of SRV records (for Automatic client Configuration) and GPO-pushed settings (for Manual Configuration) to point clients (assuming you are using the same SIP domain for all users) to their local OCS server/pool Front-End.

    Which approach to use depends on the amount of users per site (even or unbalanced) and if you don't want to mess with SQL clustering and purchasing HLBs.

    Take a look at the OCS 2007 R2 Site Resiliency White Paper for more details on load balancing/fault tolerance scenarios:
    http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=c930febb-3a44-4bf3-969d-1c52675a7063
    Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS
    Friday, October 9, 2009 7:10 PM
    Moderator
  • Hi
    Jeff gave a good suggestion.
    Any update for your issue?

    Regards!
    Friday, October 16, 2009 6:42 AM
    Moderator