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Blogs > Live code upgrade: A must-have feature for high-availability deployments
For production systems gathering hundreds of thousands of users online having the ability to apply a patch on a system without having to restart it is a major feature. It allows them to offer a high-availability service.
In real deployed system, this is the type of feature that makes a difference. Our secret for ejabberd live code upgrade feature relies on Erlang. Bill Clementson has made a good job summarizing how it works on his blog: Live Code Update in Erlang.
After reading this article, this should now seems obvious for every one and a must-have feature for production systems.
