This document discusses architecting cloud infrastructure for the future. It addresses requirements through workload optimized technologies, composable resources, and software defined infrastructure. Workload optimized technologies match different workloads with optimized server, storage, and network technologies. Composable resources allow flexible, efficient data centers through modular compute, memory, storage, and fabric resources that can be pooled and shared. Software defined infrastructure involves re-architecting the network through software defined networking and re-architecting storage through software defined storage.