Title :
Network-resource isolation for virtualization nodes
Author :
Kanada, Yasusi ; Shiraishi, Kei ; Nakao, Akihiro
Abstract :
One key requirement for achieving network virtualization is resource isolation among slices (virtual networks), that is, to avoid interferences between slices of resources. This paper proposes two methods, per-slice shaping and per-link policing for network-resource isolation (NRI) in terms of bandwidth and delay. These methods use traffic shaping and traffic policing, which are widely-used traffic control methods for guaranteeing QoS. Per-slice shaping utilizes weighted fair queuing (WFQ) usually applied to a fine grained flow such as a flow from a specific server application to a user. Since the WFQ for fine-grained flows requires many queues, it may not scale to a large number of slices with a large number of virtual nodes. Considering that the purpose of NRI is not thoroughly guaranteeing QoS but avoiding interferences between slices, we believe per-slice shaping suffices our objective. In contrast, per-link policing uses traffic policing per virtual link. It requires less resource and achieves less strict isolation between hundreds of slices. Our results show that both methods perform NRI well but the performance of the former is better in terms of delay. Accordingly, per-slice shaping is effective for delay-sensitive services while per-link policing may be sufficiently used for the other types of services.
Keywords :
computer networks; quality of service; queueing theory; resource allocation; virtualisation; QoS guarantee; bandwidth; delay; delay-sensitive service; fine grained flow; network virtualization; network-resource isolation; per-link policing; per-link policing method; per-slice shaping; per-slice shaping method; quality of service; resource slice; server application; traffic control method; traffic policing; traffic shaping; virtual network; virtualization node; weighted fair queuing; Bandwidth; Computers; Decoding; Delay; Interference; Quality of service; Resource management;
Conference_Titel :
Computers and Communications (ISCC), 2012 IEEE Symposium on
Conference_Location :
Cappadocia
Print_ISBN :
978-1-4673-2712-1
Electronic_ISBN :
1530-1346
DOI :
10.1109/ISCC.2012.6249393