標題: Hierarchical CORD for NFV Datacenters: Resource Allocation with Cost-Latency Tradeoff
作者: Lin, Ying-Dar
Wang, Chih-Chiang
Huang, Chien-Ying
Lai, Yuan-Cheng
交大名義發表
National Chiao Tung University
公開日期: 1-九月-2018
摘要: Network Function Virtualization (NFV) allows datacenters to consolidate network appliance functions onto commodity servers and devices. Currently telecommunication carriers are re-architecting their central offices as NFV datacenters that, along with SDN, help network service providers to speed deployment and reduce cost. However, it is still unclear how a carrier network shall organize its NFV datacenter resources into a coherent service architecture to support global network functional demands. This work proposes a hierarchical NFV/SDN-integrated architecture in which datacenters are organized into a multi-tree overlay network to collaboratively process user traffic flows. The proposed architecture steers traffic to a nearby datacenter to optimize user-perceived service response time. Our experimental results reveal that the 3-tier architecture is favored over others as it strikes a good balance between centralized processing and edge computing, and the resource allocation should be decided based on traffic's source-destination attributes. Our results indicate that when most traffic flows within the same edge datacenter, the strategy whereby resources are concentrated at the carrier's bottom-tier datacenters is preferred, but when most traffic flows across a carrier network or across different carrier networks, a uniform distribution over the datacenters or over the tiers, respectively, stands out from others.
URI: http://dx.doi.org/10.1109/MNET.2017.1700037
http://hdl.handle.net/11536/148258
ISSN: 0890-8044
DOI: 10.1109/MNET.2017.1700037
期刊: IEEE NETWORK
Volume: 32
起始頁: 124
結束頁: 130
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