In fact i worked at a dutch social network where we also used hiphop. The new compiled binary is pushed to all servers and then it is started, the old binary is

In fact i worked at a dutch social network where we also used hiphop. The new compiled binary is pushed to all servers and then it is started, the old binary is stopped and a port handover is done. Thus deploying without downtime. The old binary is available on the system, making a rollback very fast. However old binaries are removed after a time. So you can only roll back to a previous version quickly.