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Hyper-V Cluster

    Question

  • When creating a Hyper-V cluster, do all the nodes need to have the same amount of RAM, or can one host have more/less than another, as long as the hardware is the same? is there any official documentation on the matter?
    Wednesday, February 08, 2017 3:30 PM

Answers

  • Agree with D_S_Clark.  The nodes do not have to be exactly the same, but it is recommended.  You do not want to have failures of VMs coming up when a large node fails and the small node does not have enough memory to load all the VMs.

    You should always run the cluster validation wizard on your configuration.  It will tell you anything it finds amiss. In fact, that is how Microsoft determines if a cluster is configured properly.  If the validation wizard runs successfully, i.e. no errors, the cluster is supported by Microsoft.  However, if there are any errors or informational messages, you should investigate them to see if the raised issue is something that should be fixed.  Information messages aren't that critical, but warning may mean you have something that does need to be fixed.


    . : | : . : | : . tim

    • Marked as answer by Reuvy Thursday, February 09, 2017 5:50 AM
    Wednesday, February 08, 2017 7:28 PM

All replies

  • Ideally all Cluster nodes would be equal but I don't think you will have a problem creating a cluster when all nodes don't have the same amount of memory.
    Wednesday, February 08, 2017 4:11 PM
  • Agree with D_S_Clark.  The nodes do not have to be exactly the same, but it is recommended.  You do not want to have failures of VMs coming up when a large node fails and the small node does not have enough memory to load all the VMs.

    You should always run the cluster validation wizard on your configuration.  It will tell you anything it finds amiss. In fact, that is how Microsoft determines if a cluster is configured properly.  If the validation wizard runs successfully, i.e. no errors, the cluster is supported by Microsoft.  However, if there are any errors or informational messages, you should investigate them to see if the raised issue is something that should be fixed.  Information messages aren't that critical, but warning may mean you have something that does need to be fixed.


    . : | : . : | : . tim

    • Marked as answer by Reuvy Thursday, February 09, 2017 5:50 AM
    Wednesday, February 08, 2017 7:28 PM