Containers are a technology for running multiple workloads under the same OS kernel instead of using separate VMs, each with an OS. Container networking is at the maturity stage where VM networking was about five years ago; it is fast-evolving and fragmented, with all vendors in this research starting to provide solutions and launching initiatives. It is difficult for network architects to determine which vendors and architectures are best-suited for their usage scenarios, but at this time, containers have very limited production deployments in enterprise data centers. However, this will be an important decision in the next three years, as containers are widely used for development of Mode 2 applications that sooner or later will need to be deployed in production (see “Take [Limited] Action to Prepare Your Data Center Network for Containers” ).
I wound through the corridors toward the center of Down 15. None of the elevators were nearby, so I bounded up the stairs three at a time. Stairwells in the core are just like stairwells on Earth—short little twenty-one-centimeter-high steps. It makes the tourists more comfortable. In areas that don’t get tourists, stairs are each a half meter high. That’s lunar gravity for you. Anyway, I hopped up the tourist stairs until I reached ground level. Walking up fifteen floors of stairwell probably sounds horrible, but it’s not that big a deal here. I wasn’t even winded.