The Xen API: The Way of the Future
The Xen API is an XML-RPC interface to Xen that replaces the old interface used for communication with the hypervisor. It promises to provide a standard, stable interface so that people can build Xen frontends without worrying about the interface changing out from under them. It also extends the previous Xen command set so that more of Xen's functionality can be harnessed in a standardized tool.
In current versions of Xen, the API is an optional component, but that shouldn't deter you from using it; the most recent Citrix Xen Server product, for example, relies on the API exclusively for communication between the administration frontend and the virtualization host.
The Xen API is enabled by setting the LIBXENAPI_BINDINGS ...
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