XOS augments OpenStack and ONOS with explicit support for scalable services, making it possible to create, name, operationalize, manage and compose services as first-class operations. In doing so, XOS provides a framework for service assembly and composition that helps implement scalable services that become part of the cloud (rather than just run on the cloud), thereby lowering the barrier for cloud providers to build a rich, inter-dependent service ecosystem.
XOS is designed around the organizing principle of Everything-as-a-Service (XaaS), which unifies SDN, NFV, and the Cloud under a single coherent programming model. It is an open source project on GitHub, and is currently being applied to two use cases: OpenCloud (a joint ON.Lab, PlanetLab, and Internet2 initiative) and CORD (a joint ON.Lab, AT&T initiative).
CORD (Central Office Re-architected as a Datacenter)
XOS: An Extensible Cloud Operating System (ACM BigSystems 2015) : http://xosproject.org/wp-content/uploads/2015/04/paper-xos-bigsys15.pdf
XOS: A Service Abstraction Layer for CORD : http://xos.wpengine.com/wp-content/uploads/2015/06/Whitepaper-XOS.pdf
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