For the longest time I would have said that the right way to design a cloud application or service is as multi-tenant. But yesterday I was having a conversation with Peter Soderling from NY-based Stratus Security, which provides a secure managed API proxy (in closed beta). Peter said they had chosen to architect their service from day one as a multi-instance solution for added security and performance. If you are unfamiliar with the terms, a multi-tenant architecture commingles the data and p...