Dragonfly is an intelligent P2P based file distribution system. It resolved issues like low-efficiency，low-success rate，waste of network bandwidth you faced in large-scale file distribution scenarios such as application deployment, large-scale cache file distribution, data file distribution, images distribution etc. In Alibaba, the system transferred 2 billion times and distributed 3.4PB data every month, it becomes one of the most important infrastructure in Alibaba. The reliability is up to 99.9999%. DevOps takes a lot of benefits from container technologies . but at the same time, it also bring a lot of challenges: the efficiency of image distribution, especially when you have a lot of applications and require image distribution at the same time. Dragonfly works extremely well with both Docker and Pouch, and actually we compatible with any other container technologies without any modifications of container engine.