The social spatial geographies of telecommunications and their infrastructures have long interested scholars in the sciences, urban geography specifically. This paper focuses on data centers. Much effort has been placed preserving notion that centers are ‘clouds’, a terminology obfuscates real human cyberplaces. In this map-making exercise, we visualize sociopolitical centers, provoke reader to...

Power consumption imposes a significant cost for data centers. Thus, it is not surprising thatoptimizing energy cost in data center is receiving increasing attention. In this thesis, we focus onthe algorithmic issues at three levels of energy optimization for data centers: server level, local datacenter level and global data center level. At the server level, we analyze the common s...

Datacenters traffic is composed by numerous latency-sensitive “mice” flows, which is consisted of only several packets, and a few throughput-sensitive “elephant” flows, which occupy more than 80% of overall load. Generally, the short-lived “mice” flows induce transient congestion and the long-lived “elephant” flows cause persistent congestion. The network congestion is a major performance inhib...

With data centers being the supporting infrastructure for a wide range of IT services, their efficiency has become a big concern to operators, as well as to society, for both economic and environmental reasons. The goal of this thesis is to design energy-efficient algorithms that reduce energy cost while minimizing compromise to service. We focus on the algorithmic challenges at different level...

Automated Management of Virtualized Data Centers

This paper presents a resource model that describes the computing and networking components in a resource sharing environment in an Internet Data Center (IDC), a model for multi-tier applications that need to be deployed in this environment, and an optimization problem for resource assignment aimed at minimizing the communication delay between the servers. A number of techniques are introduced ...