We're looking at a refresh of our virtual environment late this year or early next, and I'm taking the opportunity to reexamine our architecture. Currently we have a 9TB SAN with dual everything connecting to three hosts with a total of 55 VMs. However, even with this I don't like that the SAN is single point of failure, especially since we've had a dual controller reset on the SAN before (absolutely not fun). However, I understand a physical SAN, I understand its limitations, and it's a proven technology.
VSAN makes a lot of sense to me on the theoretical level, and I can see it being the future of virtualized storage. However, it's only been a year since VMware released their VSAN product.
So, is VMware VSAN ready for a production environment with business critical VMs on it?