SQL Server HA

  • Our network admin created a cluster  (vmware using shared disks seetings - 2 nodes) so plan to install SQL Server AlwaysOn.  After some trial and error, it now has passed the cluster validation and I can continue to install SQL.

    Are my next steps correct?

    [1] Install SQL Server 2019 on both nodes as a STAND-ALONE install

    [2] Then configure AlwaysOn Availability Group after.

    Reason I'm asking is that on the SETUP, there is an option  for a "NEW SQL Server Failover cluster Installation" so I'm not sure which one to use.

    Thanks

     

  • Your steps are correct for AlwaysOn - you install stand-alone instances on each server in the cluster and then configure an availability group.

     

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  • OK So I watched 2 youtube videos and below helped me setup what I need.

    https://www.youtube.com/watch?v=pmTK5Um_9bw

    In a nutshell, I did not follow my proposed steps 1&2. As with the tutorial, I went ahead and installed as follows:

    [1] "New SQL Server Failover Cluster Installation" on the Active Node

    [2] Used the "Add a Failover Cluster Node" after on the other node.

    Thanks!

  • Glad you where able to install.

    As a side note please remember that "Always On" is just a marketing term from Microsoft.   Always On can refer to Always On Failover Cluster Instances or Always On Availability Groups.  So generally the Always On portion is removed to understand the correct setup.

    Failover Cluster Instances utilise the shared disk setup

    Availability Groups utilise dedicated disks per replica

    So you can define the correct install methods usually based on the disk configuration.

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