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A Load Balancing and Multi-Tenancy Oriented Data Center Virtualization Framework
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DOI：10.1109/TPDS.2017.2657633.png)
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摘要
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Virtualization is an essential step before a bare-metal data center being ready for commercial usage, because it bridges the foreground interface for cloud tenants and the background resource management on underlying infrastructures. A concept at the heart of the foreground is multi-tenancy, which deals with logical isolation of shared virtual computing, storage, and network resources and provides adaptive capability for heterogeneous demands from various tenants. A crucial problem in the background is load balancing, which affects multiple issues including cost, flexibility and availability. In this work, we propose a virtualization framework that consider these two problems simultaneously. Our framework takes advantage of the flourishing application of distributed virtual switch (DVS), and leverages the blooming adoption of OpenFlow protocols. First, the framework accommodates heterogeneous network communication patterns by supporting arbitrary traffic matrices among virtual machines (VMs) in virtual private clouds (VPCs). The only constraint on the network flows is that the bandwidth of a server's network interface. Second, our framework achieves load balancing using an elaborately designed link establishment algorithm. The algorithm takes the configurations of the bare-metal data center and the dynamic network environment as inputs, and adaptively applies a globally bounded oversubscription on every link. Our framework concentrates on the fat-tree architecture, which is widely used in today's data centers.
Keyword:
Virtualization
load balancing
multi-tenancy
data center
data center networks
OpenFlow
distributed virtual switch
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