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Planning Guide—vSAN 2-Node Cluster on VxRail

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Deployment Types
Centralized management (Option 1) Centralized management, localized Witness (Option 2) Localized management and Witness (Option 3)

Localized management and Witness (Option 3)

  • In this option, the three fault domains are at the same location; the vCenter Server, vSAN Witness appliance, and the VxRail nodes. An additional ESXi host is required to host vSAN Witness appliance and customer-supplied vCenter Server. vSAN Witness appliance, and customer-supplied vCenter cannot be hosted in the VxRail vSAN 2-node cluster.

    Figure 10.          Localized vCenter and Witness Appliance

    Table 2.              Deployment options considerations

    Option

    Pros

    Cons

    Centralized Management and Witness

    Single pane of glass for the management of multiple 2-node clusters

    Centralization of Witness appliances reduces licensing and hardware costs.

    Network costs for vCenter and Witness communications

    Centralized Management, localized Witness

    Single pane of glass for the management of multiple 2-node clusters

    Network costs for vCenter communications

    Software and hardware costs for deployment of witness appliances

    Localized management and witness

    Reduces network cost that is associated to normal operations and witness contingency

    Software and hardware costs for deployment of multiple vCenter Servers and witness appliances

    Network Bandwidth that is still needed for maintenance and troubleshooting which is the larger bandwidth requirement