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E2E Deployment and Operations Guide with Stretched Cluster: Integrated System for Microsoft Azure Stack HCI
About using this guide Introduction Solution overview Solution deployment Creating a stretched cluster Virtual Machines
Virtual Machines
Introduction
VM and storage affinity rules
Preferred sites
Failure/Recovery from failure of Site/Node Appendices Day 1 operations Managing and monitoring clusters with Windows Admin Center Dell OpenManage Integration with Windows Admin Center Updates and maintenance References

Preferred sites

Home > Integrated Products > Microsoft HCI Solutions from Dell Technologies > Guides 22H2 and earlier > E2E Deployment and Operations Guide with Stretched Cluster: Integrated System for Microsoft Azure Stack HCI > Preferred sites

Preferred sites

  • Configure preferred sites in a stretched cluster to define a location in which you want to run all your resources. This ensures that VMs and volumes come up on the preferred site after a cold start or after network connectivity issues. A dynamic quorum ensures that preferred sites survive after events such as asymmetric network connectivity failures.

    In the event of a quorum split, if witnesses cannot be contacted, the preferred site is selected and the passive site drops out of the cluster membership.

    VMs in a stretched cluster are placed based on the following site priority:

    • Storage Affinity Site
    • Group Preferred Site
    • Cluster Preferred Site

    Host VMs and associated Virtual Disks

    VM placement can be difficult in a Hyper-V clustered environment. Always ensure that VMs that have I/O-intensive workloads are hosted on the node that owns the VM's Virtual Disk.