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AnswerWhich Sounds Best SCC or CCR?

  • Wednesday, November 04, 2009 9:17 PMbatekhead Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    I am in the process of installing Exchange 2007 sp1 on Windows 2008. I have to servers at site A and two servers at site B. I have a SAN at both locations as well that will hold the databases. Currently, non-clustered Exchange 2003 on Windows 2003 is running. The servers and SAN solution meets the clustering criteria. I need the cluster setup as such:

    Node1(A-Local Site), Node2(P-Local Site)
    Node3(A-Remote Site), Node4(P-Remote Site)

    If the local site becomes unavail, the information can come online on the passive node at the remote site and vice versa.

    I would like the incorporation of the backups that is given with ccr, however, i feel that scc is my only option. could someone lend some guidance on which would be a better fit for my situation? Also, I inherited this so failover cluster service was already installed. Will this make a difference in installation? Do I need to uninstall it on the servers before I install Exchange? Help is greatly needed and appreciated. If you need further info, just let me know.
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  • Thursday, November 05, 2009 4:11 AMjader3rd Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    You need to install and setup the cluster before installing Exchange.
     
  • Thursday, November 05, 2009 4:15 AMAmit TankMVP, ModeratorUsers MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
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    Well, with Windows 2008 you can go for Geo-Cluster CCR but you need to stretch the AD site across the datacenters/sites since both nodes should be in same AD site in a cluster...

    Reference:
    Deploying an Exchange 2007 SP1 CCR Cluster on a Windows Server 2008 Failover Cluster – Part 1: Prerequisites & Configuring the failover cluster nodes

    Also refer below article while placing FSW for Geocluster...

    Placement of the File Share Witness (FSW) on a Geographically Dispersed CCR Cluster

    And as always compare to SCC, CCR gives database level availability due to multiple copy of database...

    Amit Tank
    MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, Configuration
    MCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.com

     
  • Thursday, November 05, 2009 4:49 AMJ. Peter Bruzzese Users MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Greetings,

    I hate to recommend a change of gears when you are already deep into the process with Exchange 2007 but if you can hang on just a little bit longer I think you will find the new storage architecture and high availability options in Exchange 2010 to be worth the wait in your case.  DAG groups that allow for multiple site location with replicas of your database that are ready to go live in the event of a failure (and you don't need to be a clustering expert).

    However, if you are already committed to moving forward, I believe Amit gives solid information below.

    J. Peter Bruzzese
    www.exclusivelyexchange.com
    (MCT/Triple-MCSE/MCITP)
     
  • Thursday, November 05, 2009 7:36 AMDhaferMVPUsers MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    Best solution is to implement CCR under ALL Exchange 2007 clusters; but I recommand you if can wait for Exchange 2010; it will be more simple by using DAG
    If you want CCR you need to implement Witness FileShare in high availability mode

    BR
    Dhafer
     
  • Friday, November 06, 2009 6:27 AMJames-LuoMSFT, ModeratorUsers MedalsUsers MedalsUsers MedalsUsers MedalsUsers Medals
     
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    “All nodes in an SCC or CCR environment must be in the same Active Directory site. Although Windows Server 2008 failover clusters introduce support for cluster nodes to be members of different Active Directory sites, this configuration is not supported by Exchange 2007”

    ------<New High Availability Features in Exchange 2007 SP1>

    It’s not supported to deploy the nodes into different sites. Or, you can take Amit’s suggestion to deploy the Geo-cluster

    Considerations for Exchange 2007 CCR Stretch Clusters

    James Luo
    TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx)
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