Recent years have witnessed a new video delivery paradigm: smartrouter-based video delivery network, which is enabled by smartrouters deployed at users’ homes, together with the conventional video servers deployed in the datacenters. Recently, ChinaCache, a large content delivery network (CDN) provider, and Youku, a video service provider using smartrouters to assist video delivery, announced t...

As theWeb evolves, the number of network services deployed on the Internet has been growing at a dramatic pace. Such services usually involve a massive volume of data stored in physical or virtual back-end databases, and access the data to dynamically generate responses for client requests. These characteristics restrict use of traditional mechanisms for improving service performance and scalab...

A key challenge in the development of the Internet is to simplify construction of scalable widearea services. One approach to scaling wide-area services is to deploy generic computing power and storage in the network, and use it to absorb service load through dynamic resource recruitment, active caching, or dynamic service replication. Each of these approaches introduces distributed state and a...

In order to overcome the high latencies involved with accessing remote Web objects, caching is often used. Unfortunately there are a number of problems with current caching mechanisms. First of all, the client/server model used in the Web does not scale well. Second, the replication and coherence strategies used are implemented at the client side according to a \one policy ts all" principle and...

Like the biological clock in the body, replication of each cell type (even different cells of the same organism) follows a timing program. Abnormal function of this timer could be an alarm for a disease like cancer. DNA replication starts from a specific point on the chromosome that is called the origin of replication. In contrast to prokaryotes in which DNA replication starts from a single ...

It is evident that in the new Web era, content volume and services availability play a major role, leaving behind typical static pages which have solely text and images. The majority of the business oriented service providers are concerned for the Quality of Services (QoS), in terms of content delivery. In this context, proxy servers and Content Delivery Networks (CDNs) have been prosposed as d...

The growing traffic of WWW related services requires the development of efficient protocols for reducing traffic, balancing load, and improving service time. One way of achieving these effects is via caching or replication. Studies like [Bestavros et al, 1995] show that simple demand-driven caching is not enough, and that aggressive caching policies have to be adopted. One such policy is prefet...

In the current Internet, web content is increasingly being cached closer to the end-user to reduce network and web server load and therefore improve performance and user perceived quality. Existing web caching systems typically cache entire web documents and attempt to keep them consistent with the origin server. This approach works well for text and images; for bandwidth intensive multimedia d...

In order to reduce average delay and bandwidth usage in the Web, geographically dispersed servers often store copies of popular objects. For example, with network caching, the origin server stores a master copy of the object and geographically dispersed cache servers pull and store copies of the object. With site replication, objects stored at master are replicated into secondary sites. In this...