Clustering Vs Always on

  • For 2 node cluster setup, my understanding is the i need to configure two different servers as part of one cluster name. So the server name would be technically the cluster name right?  It does need two physical IP address right? 
    Also, when i move the databases from standalone sql server to the 2 node cluster node, the name of the SQL server name would be cluster name right? Please advise?
    Does Always on will come any closer to redundancy and load balancing, i know it's more of replacing the mirroring and better DR solution.
    Thanks

  • There are two kinds of AlwaysOn technology. One is AlwaysOn FCIs, and one is AlwaysOn Availability Groups. The answer to your question largely depends on which one you mean. It sounds like you're referring to FCIs, but I can't be sure.

  • Sorry i wasn't clear. I was referring to AlwaysOn FCIs.

  • AlwaysOn FCI's isn't worth it with 2 node cluster...you're adding more complexity to deal with. I would suggest play simple with 2 standalone nodes clustered with AlwaysOn AG and you should be fine.

  • Typically, for an Always-On setup, you will need:  1) Cluster name + IP  2) Nodes with IPs 3) AG Names with IPs 4) Listener Names with IPs

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