Virtual Resources Sample Clauses

Virtual Resources. The virtual resources information model is used to describe the optical resource virtualization service. This model includes the description of all the virtual resources that can be created inside a Data Centre, for example virtual nodes (network nodes (V Net Node) and IT nodes/VMs (VM)) and virtual links (V Link). The SDN based Control Plane will focus on the network related resources. The optical resource virtualization service APIs can be expressed through the common CRUD actions to be invoked over a virtual resource, for example “create a virtual node with a given number of virtual ports”, “delete the virtual link with a given ID”, etc. Asynchronous events can be also modelled as modifications in the status of an existing resource (e.g. a node failure can change the operational state of that node resources). Therefore they can be retrieved through proper subscriptions associated to a given type of resources or attributes in the database. Moreover, further commands can define other specific operations on some resources, for example “connect port A with port B in node N”. Some key attributes for describing each element have been identified in Figure 14: • Virtual DC topology o Topology (interconnections of the links and nodes) o Number of nodes (virtual network and IT) o Capacity (each node and each link) • V Net Node o Number of ports o Bitrate per ports o Other advanced features and functionalities which abstract the technology capability • VM o CPU requirement o Memory requirement o Capacity requirement • V Link o Bandwidth o Latency o Other advanced features and functionalities which abstract the technology capability Figure 14. Information model for virtual DC resources Depending on the physical technology which is at the basis of the virtual resource, the advanced parameters which characterize virtual network nodes and links may be slightly different, however they will provide a certain level of abstraction and try to use common and unified concepts. This approach allows the other services which will use the basic virtual optical resources (e.g. to compose a virtual slice) to exploit the optical characteristics of the DCN, while using common mechanisms, procedures and algorithms.
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Virtual Resources 
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