Does Bitbucket Server support any kind of mirroring capabilities?
Currently the Bitbucket Server team is working on a solution that will allow users to mirror their production instance on another instance of Bitbucket Server. This will be useful for teams who've been hitting Bitbucket Server with a high amount of continuous integration requests, i.e. your CI server, like Jenkins or Bamboo, clone your repositories every time a change is pushed into the repo. By shifting this CI cloning to the mirror instance, you'll be freeing some of the load on your production server. Keep in mind that the clone action is the most resource intensive action in Bitbucket Server, and is the number 1 item to consider when selecting your hardware.