Photon will be a multi-container supporting system
Photon will be a littler larger, 300 MB, and run Docker, Rocket (now rkt) and Garden containers. Cloud Foundry's Garden isn't a container format per se, like Docker. Rather, it is a container process runtime environment capable of working with whatever container format is presented to it. Unlike Docker, whose container formatting also sets parameters for the runtime environment, Cloud Foundry's Garden is aiming to be a container neutral process manager. Watters said that's what large enterprises will be using in the future. CoreOS runs both Docker and its own rkt. Red Hat's Atomic Host runs Docker but will be revised to run any container format with a large enough following to justify the technology investment, say its managers.