I talked earlier about PaaS solutions. My struggle with them has always been that they often get the abstraction level wrong, and that self-hosted solutions lag significantly behind hosted solutions like Heroku. Docker gets much more of this right, and the explosion of interest in this space means I suspect it will become a much more viable platform for all sorts of deployments over the next few years for all sorts of different use cases. In many ways, Docker with an appropriate scheduling layer sits between IaaS and PaaS solutions — the term containers as a service (CaaS) is already being
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