Arne Wiebalck and Belmiro Moreira with CERN and Sunny Cai with the Open Infrastucture Foundation recently posted a an article on SuperUser titled Scaling Bare Metal Provisioning with Nova and Ironic at CERN: Challenges & Solutions. In this post, they talk about their experiences scaling their deployment and the solutions which they found to the problems they encountered. It is a very informative piece, check it out!