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Planning Guide—Dell EMC VxRail 7.0 vSAN Stretched Cluster
Executive summary Overview
Overview
Distributed Resource Scheduler
Fault domains
VxRail cluster nodes
Witness host
VxRail cluster requirements
vCenter Server requirements
Customer-supplied vCenter Server requirements
Networking and latency Appendix A: VxRail stretched cluster setup checklist Appendix B: VxRail stretched cluster open port requirements

VxRail cluster requirements

VxRail cluster requirements

  • This section describes the requirements to implement vSAN stretched clusters in a VxRail Cluster running VxRail v7.0.

    • The VxRail cluster must be deployed across two physical sites in an active/active configuration.
    • The VxRail cluster must be running VxRail version 7.0 or later.
    • Failure Tolerance Method of RAID5 or 6 must be all-flash.
    • The minimum supported configuration is 1+1+1 (2 nodes +1 witness). See the vSAN 2-Node Cluster on VxRail Planning Guide for more detailed information.
    • The maximum supported configuration is 15+15+1 (30 nodes+1 witness).
    • A witness host must be installed on a separate site as part of the installation engagement. The witness must be running the same version as the vSphere. See Table 1 for version compatibility.

    Table 1.      VxRail/Witness Host OVA Compatibility Chart

    VxRail Version

    Witness Host OVA Version

    VxRail 7.0.x

    OVA Version 7.0