Download Collaborative Web Hosting: Challenges and Research by Reaz Ahmed, Raouf Boutaba PDF

By Reaz Ahmed, Raouf Boutaba

This short provides a peer-to-peer (P2P) web-hosting infrastructure (named pWeb) that may rework networked, home-entertainment units into light-weight taking part net servers for many times storing and serving multimedia and web pages. the problems addressed contain making sure content material availability, Plexus routing and indexing, naming schemes, net identification, collaborative internet seek, community structure and content material indexing. In pWeb, user-generated voluminous multimedia content material is proactively uploaded to a close-by community position (preferably in the comparable LAN or at the least, in the similar ISP) and a established P2P mechanism guarantees web accessibility by means of monitoring the unique content material and its replicas. This new paradigm of knowledge administration strives to supply low or no-cost cloud garage and entices the top clients to add voluminous multimedia content material to the cloud facts facilities. although, it ends up in problems in privateness, community structure and content material availability. Concise and useful, this short examines the advantages and pitfalls of the pWeb web-hosting infrastructure. it truly is designed for pros and practitioners engaged on P2P and internet administration and can also be an invaluable source for advanced-level scholars learning networks or multimedia.

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12. The limit on speed-up according to Amdahl’s law. 13. Task graph exhibiting limited inherent parallelism. INTRODUCTION TO PARALLELISM 19 many processors are used. 1, speed-up has an upper bound of 10. Fortunately, there exist applications for which the sequential overhead is very small. Furthermore, the sequential overhead need not be a constant fraction of the job independent of problem size. In fact, the existence of applications for which the sequential overhead, as a fraction of the overall computational work, diminishes has been demonstrated.

3. Government funding in the United States and other countries dried up, in part related to the end of the cold war between the NATO allies and the Soviet bloc. Commercial users in banking and other data-intensive industries were either saturated or disappointed by application difficulties. Microprocessors developed so fast in terms of performance/cost ratio that customdesigned parallel machines always lagged in cost-effectiveness. Many of the newly formed companies went bankrupt or shifted their focus to developing software for distributed (workstation cluster) applications.

8. Computing prefix sums on a linear array with two items per processor. originating at different processors can flow rightward and leftward in lockstep, without ever interfering with each other. Broadcasting. If Processor i wants to broadcast a value a to all processors, it sends an rbcast(a) (read r-broadcast) message to its right neighbor and an lbcast(a) message to its left neighbor. Any processor receiving an rbcast(a ) message, simply copies the value a and forwards the message to its right neighbor (if any).

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