Provisioning, Recovery, and In-Operation Planning in Elastic Optical Networks

6 Transfer‐based Datacenter Interconnection

Adrián Asensio, Marc Ruiz and Luis Velasco

Universitat Politècnica de Catalunya, Barcelona, Spain

Although datacenter (DC) resource managers can request optical connections and control their capacity, a notification‐based connectivity model brings noticeable costs savings. That connectivity model is useful when connectivity can be specified in terms of volume of data and completion time (we call this transfer‐based connectivity).

To increase network resource availability, in this chapter, we propose an Application Service Orchestrator (ASO) as an intermediate layer between the cloud and the network. In this architecture, DC resource managers request data transferences using an application‐oriented semantic. Then, those requests are transformed into connection requests and forwarded to the Application‐based Network Operations (ABNO) in charge of the transport network. The proposed ASO can perform elastic operations on already established connections supporting transferences provided that the committed completion time is ensured. Polling‐ and notification‐based models are compared in a scenario considering ASO.

Then, we propose not only using elastic operations incrementing transfer‐based connections’ capacity but also scheduling elastic operations, both incrementing and decrementing transfer‐based connections’ capacity. Transfer‐based requests from different DC operators received by ASOs are routed and resource allocation scheduled ...