Hello, everyone.
I have a customer who is validating the several requirements for implementing a Stretched Cluster solution with vSAN ready nodes in two sites. Here are two questions that I want to clarify:
- The simulation or measurement of the latency between the Data Sites and between Witness site and Data Sites should be done between the routers of each Datacenter? I understand that those routers are the ones that allow the long distance communication between sites. I thought that this measurement had to be metered between vSAN nodes o witness and vSAN nodes, but since I don't have implemented the cluster I cannot make that measurement. I think that the major latency should be generated between the routers, right? So if the latency between routers is under the maximums (5ms for data sites and 200ms for witness to data sites), the latency between vSAN nodes should be practically the same.
- Is there any requirement for Stretched Cluster implementation for the redundancy type of inter-link between Data sites and Witness to data sites? Is it mandatory to have two links? active-active redundancy? active-standby redundancy? Or can I have just 1 link and have support from VMware.
I appreciate your opinions and answers. Thanks in advanced.
Best regards,
Rolando