A Survey of Content Placement and Replacement in Content Delivery Networks

PhD Qualifying Examination


Title: "A Survey of Content Placement and Replacement in Content Delivery
Networks"

by

Mr. Min WANG


Abstract:

One of the striking usages of Internet is as the vehicle of content 
generation, sharing and access, which the Internet was not conceived for. 
Two broad classes of solutions have been proposed to support this demand, 
i.e., Content Delivery Networks (CDNs) and Peer-to-peer Networks (P2P). 
The main focus of this survey is on the content placement and replacement 
in CDNs.

Content delivery networks (CDNs) attempt to improve web performance by 
delivering content to end users from multiple, geographically scattered 
replica servers which are usually located at the edge of the network. CDNs 
are expected to speed up the delivery of Web content and reduce the load 
on the original content servers and the network bandwidth consumption. To 
this end, a content provider contracts with a CDN to host and distribute 
its content, and the CDN performs content replication or caching on 
strategically deployed replica servers. In this survey, we explore three 
vital issues with respect to effective content distribution and 
management, which is crucial to the overall performance of a CDN: replica 
server placement problem, which aims at choosing appropriate sites to 
place replica servers; object placement problem, which determines how 
many copies of each piece of content to replicate and where to store the 
replicas; and content replacement strategy, which decides what cached 
object should be evicted to make room for newly requested object, when 
pull-based content outsourcing approach is adopted. Finally, we briefly 
discuss some recent research trends focusing on how to design the future 
Internet as a content centric network.


Date:                   Monday, 13 February 2012

Time:                   10:30am - 12:30pm

Venue:                  Room 3405
                         lifts 17/18

Committee Members:	Dr. Brahim Bensaou (Supervisor)
                         Dr. Jogesh Muppala (Chairperson)
 			Dr. Lin Gu
 			Prof. Danny Tsang (ECE)


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