Kennu, projects like OpenStack & Cloud Foundry struggle doing 10% of AWS. unlike AWS & Azure, OSS doesn't have central control. if we learn from Linux the stack is composed of many independent elements (storage, networking, configuration, security, ..) and the way they all work together is because the community agreed on abstractions/APIs between those elements. that's what i suggested in my post, in most cases linux can have few file systems, few protocols, .. since in an open environments people can innovate, but all those adhere to the layers & APIs of the stack

BTW the problem is that you use AWS APIs in small scale, than you grow and have to pay quite a bit to AWS, and its too hard to move to the half-baked open source frameworks

Yaron Haviv (iguazio)