One of the main impediments to large OpenFlow deployments is the insufficient number of flows in today's hardware switches. That being said, the number of flows is not the only stat that matters in a network implementation.
MongoDB doesn't really bring much new stuff to the table. Whereas Cassandra has an innovative consistency protocol, Redis has "crazy data structures," and Hadoop has powerful batch data-processing abilities, MongoDB has mmap. But that's okay.
Large-scale legacy replacement might be the hardest job in the entire IT industry. Let Brandon Byars share his experiences with nonpublic APIs, and lessons learned from doing large scale RESTful integration across multiple teams.
It goes by many names: Cloud, Platform as a Service, Computing Platform. It comes down to this: give developers the right interfaces to their operations to make them as productive as possible -- and all the while keep everything running smoothly.
Learn from FoundationDB co-founder, Dave Rosenthal, about the history of NoSQL, problems that have arisen due to a lack of data consistency in NoSQL, his views on the CAP Theorem and where it's all headed.