时 间：2012年12月14日（周五）上午9:30

地 点：北京大学计算机科学技术研究所 309 会议室 （中关村北大街128号计算机所大楼）

报告人：劳丰

报告题目：Bargaining Towards Maximized Resource Utilization in Video Streaming Datacenters

报告摘要：

Datacenters can be used to host large-scale video streaming services with better operational efficiency, as the multiplexing achieved by virtualization technologies allows different videos to share resources at the same physical server. Live migration of videos from servers that are overloaded to those that are under-utilized may be a solution to handle a flash crowed of requests, in the form of virtual machines (VMs). However, such migration has to be performed with a well-designed mechanism to fully utilize available resources in all three resource dimensions: storage, bandwidth and CPU cycles. In this paper, authors show why the challenge of maximizing the resource utilization in a video streaming datacenter is equivalent to maximizing the joint profit in the context of Nash Bargaining solutions, by defining utility functions properly. having servers participating as players to bargain with each other, and VMs as commodities in the game, traces conducted after bargaining govern VM migration decisions in each server. With extensive simulations driven by real-world traces from UUSee Inc., they show that our new VM migration algorithm based on such Nash Bargaining solution increased both the resource utilization ratio and the number of video streaming requests handled by the datacenter, yet achievable in a lightweight fashion.

注：文章选自 INFOCOM, 2012 Proceedings IEEE, Page(s): 1134 - 1142