2026-04-13T06:47:57Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/261262025-07-17T02:42:44Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Asensio Carmona, Adrian author Velasco Esteban, Luis Domingo author Ruiz Ramírez, Marc author Junyent Giralt, Gabriel author 2014 Datacenter federations are able to manage appropriately the green energy resources available in each datacenter (DC) thanks to their geographically distributed infrastructure, thus reducing energy expenditure. Scheduling algorithms can perform virtual machine migration, transferring a huge amount of raw data from one DC to another to minimize operational costs and ensuring a certain Quality of Experience (QoE). Optical connections can be used to provide connectivity services of enough capacity so as to perform those migrations. In particular, elastic optical networks can provide connections with multi-granular bitrate, which can be adapted on demand. DC resource managers can request optical connections and control their capacity. However, that scheme involves the resource managers to implement algorithms and interfaces to deal with network specifics and complexity. To solve that issue, in this paper we propose carrier software defined network (SDN) to perform network-driven transfer mode for inter-DC operations; inter-DC connectivity is requested in terms of volume of data and completion time. We analyze cost savings when each connectivity model is applied in a DC federation. For the sake of a compelling analysis, exhaustive simulation experiments are carried out considering realistic scenarios. Results show that the network-driven model can save up to 20% of energy costs and more than 30% of communication costs in the evaluated scenarios. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica Data processing service centers Telecommunication -- Energy conservation Energy costs minimization Federated datacenters Inter-datacenter networks Centres informàtics Telecomunicació -- Estalvi d'energia Carrier SDN to control flexgrid-based inter-datacenter connectivity