OpenStack, CloudStack, Eucalyptus and OpenNebula

We described in a previous post our experience about the different types of cloud models, and our view about how the main open-source Cloud Management Platforms (CMPs) are targeting their needs. Our aim was to demonstrate that we will see an open-source cloud space with several offerings focused on different environments and/or industries, due to the fact that no single CMP can be all things to all people. The four open-source CMPs will coexist and, in some cases, work together in a broad open cloud ecosystem.
This article tries to answer another quite common question in open-source cloud computing discussions and presentations… which CMP is the most open? Of course such analysis should go beyond just considering the openness of the code (which as far as we know is fully open-source in the four projects) and the development process to additionally address the perspectives of the consumers and the builders of the cloud infrastructure.

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