149041 20250124153131.0 doi 10.1016/j.comcom.2023.10.001 sideral 137880 ART-2023-137880 eng Perez-Valero, Jesus Performance trade-offs of auto scaling schemes for NFV with reliability requirements 2023 A major concern for future mobile networks is to meet extremely stringent reliability requirements without incurring very high energy consumption. To this aim, we need auto-scaling techniques to switch on/off servers on demand, ensuring that they are active when required. One key challenge is to keep the right number of active servers while accounting for both the fallibility of servers and their non-zero boot up time: if this number is too small we risk service disruption, but if it is too large resources will be wasted. In this paper, we analyze this challenge by assessing the performance of different strategies to support an energy-efficient highly-reliable service, which range from deploying few blade (i.e., reliable) servers to deploying many nano (i.e., unreliable) servers. Our main take-away message is two-fold: (1) a server farm of nano servers can provide a more energy efficient operation than a farm of blade servers, but (2) it involves a very dynamic operation both in terms of task migrations and (de)activations, which challenges the endurance of the hardware. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T31-23R info:eu-repo/grantAgreement/EC/H2020/101015956/EU/ A flagship for B5G/6G vision and intelligent fabric of technology enablers connecting human, physical, and digital worlds /Hexa-X This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 101015956-Hexa-X info:eu-repo/grantAgreement/ES/MCINN/PID2022-136476OB-I00 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 4.5 2023 COMPUTER SCIENCE, INFORMATION SYSTEMS 51 / 250 = 0.204 2023 Q1 T1 TELECOMMUNICATIONS 28 / 119 = 0.235 2023 Q1 T1 ENGINEERING, ELECTRICAL & ELECTRONIC 80 / 353 = 0.227 2023 Q1 T1 1.402 2023 Computer Networks and Communications 2023 Q1 14.1 2023 info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion Garcia-Reinoso, Jaime Banchs, Albert Serrano, Pablo Ortin, Jorge (orcid)0000-0001-9052-9554 Costa-Perez, Xavier 212 (2023), 251-261 Comput. commun. COMPUTER COMMUNICATIONS 0140-3664 579475 http://zaguan.unizar.es/record/149041/files/texto_completo.pdf Preprint 1645991 http://zaguan.unizar.es/record/149041/files/texto_completo.jpg?subformat=icon icon Preprint oai:zaguan.unizar.es:149041 articulos driver 2025-01-24-14:49:31 ARTICLE