3 Replies Latest reply on Aug 2, 2018 1:48 AM by RickVerstegen

    SDDC, why 2 vCenters per AZ?

    Philch Lurker

      Hi everybody.

      In the Architecture and Design document for SDDC, the SDDC logical design for Single Availability Zone scheme shows 2 vCenters, one for the Management and the other for the Compute.

      Is it a must to have 2 vCenter?

      What is the reason?

      Does it depend on the infrastructure components installed (for example if NSX is not used, do we have to have 2 vCenter)?

       

      In advance thank you for your answer.

       

      Philippe.

        • 1. Re: SDDC, why 2 vCenters per AZ?
          sk84 Expert
          vExpert

          Is it a must to have 2 vCenter?

          What is the reason?

          Nothing in this document is a must. It is a guide for the best way to build a SDDC. It's therefore more an advisory or collection of best practices. However, VMware can guarantee that your SDDC stack will deliver the best possible performance, availability and scalability if you follow this architecture and design document.

           

          The reasons for 2 vCenters (one for management and one for compute) are availability and scalability. vCenter has limitations on the maximum virtual network ports available or a maximum for VMs it can manage, for example (and some more). And even if the management cluster fails, the impact on the productive virtual machines is less.

          • 2. Re: SDDC, why 2 vCenters per AZ?
            Philch Lurker

            Hi SK84,

             

            that was what i thought about the scalability and the impact of a vCenter failure.

            Thank you for your confirmation.

            • 3. Re: SDDC, why 2 vCenters per AZ?
              RickVerstegen Expert
              vExpert

              Another addition, using this model provides the following benefits:

              1. Isolation of management and compute vCenter Server operations

              2. Simplified capacity planning

              3. Separated upgrade

              4. Separated roles