Immutable servers provide extreme levels of control over system state, however this can require fundamental changes in the views of systems, patterns, deployments, application code, and team structure as Chad Fowler, CTO of 6wunderlist.com, writes in his recent blog post "Trash Your Servers and Burn Your Code: Immutable Infrastructure and Disposable Components".
ZeroTurnaround brings its hotpatching technology into production deployments via LiveRebel, a solution for online updates of Java EE applications. New in this version are the improved user interface and the transactional nature of updates (fully reversible).
ZeroTurnaround's LiveRebel 1.0 aims to alleviate downtime and lost sessions in server deployment automation. In this Q&A with Zero Turnaround, InfoQ discusses tooling support and how to improve processes that are largely manual and partially scripted.