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Architecture Guide – VMware Cloud Foundation 4.x on VxRail
Executive Summary Architecture Overview Workload Domain Architecture VxRail Virtual Network Architecture Network Virtualization NSX-T WLD Design Enabling VCF with Tanzu Features on Workload Domains Physical Network Design Considerations Storage Options
Introduction
vSAN
vSAN HCI Mesh
FC Storage
Multisite Design Considerations Operations Management Architecture Lifecycle Management Cloud Management Architecture

vSAN HCI Mesh

vSAN HCI Mesh

  • Introduced in VCF version 4.2 vSAN HCI Mesh supports the sharing of spare vSAN storage capacity between VxRail clusters in a VI workload domain. It can only be used as a secondary storage option and either vSAN or FC storage need to be used for primary storage. It enables an alternative method to alleviate decreasing storage capacity in a VI workload domain. This can be useful for environments that are not compute-constrained in a VI workload domain in order to avoid adding nodes which increase both compute and storage resources.

    Prerequisites

    The following prerequisites must be met before configuring vSAN HCI Mesh:

    • All VxRail clusters participating in an HCI mesh topology must be managed by a single vCenter instance.
    • All VxRail clusters participating in an HCI mesh topology located under a single data center instance.
    • Data center network configured to enable connectivity between server VxRail cluster and client VxRail cluster.
    • The client VxRail cluster can mount no more than 5 remote vSAN datastores from server VxRail clusters.
    • The server VxRail cluster’s vSAN datastore is not mounted by more than 5 client VxRail clusters.

    Feature Support

    The configuration of the client and server VxRail clusters in a vSAN HCI mesh is performed in the VxRail cluster level using the vClient. SDDC manager detects the presence of a vSAN HCI Mesh in a VI workload domain and alerts the user through SDDC Manager. All existing VCF on VxRail workflows are compatible with vSAN HCI mesh. There are constraints built into SDDC Manager to prevent the removal of a dependent VI workload domain or dependent VxRail cluster if there is a sharing of a vSAN datastore in effect.