We study the optimization of the expected number of bytes that must be transferred by a Web server when a user visits one of its pages. Given a Web site, we want to find an assignment of hotlinks (shortcuts) that minimizes the expected data transfer, i.e., the average amount of bytes to be downloaded in order to reach one of its pages. We propose an optimization algorithm and perform simulation...

web hosting service, web server cluster, load balancing, scalability, super linear speedup, performance analysis FLEX is a new cost effective, "locality aware" load balancing solution for a shared web hosting service implemented on a cluster of machines [C99]. FLEX allocates hosted web sites to different machines in the cluster based on the sites' processing and memory requirements which are es...

On-line services are making increasing use of dynamically generated Web content. Serving dynamic content is more complex than serving static content. Besides a Web server, it typically involves a server-side application and a database to generate and store the dynamic content. A number of standard mechanisms have evolved to generate dynamic content. We evaluate three specific mechanisms in comm...

Nonlinear Optimization Problems are usual in many engineering fields. Due to its characteristics the objective function of some problems might not be differentiable or its derivatives have complex expressions. There are even cases where an analytical expression of the objective function might not be possible to determine either due to its complexity or its cost (monetary, computational, time, ....

Load balancing in computer networks is one of the most subjects that has got researcher's attention in the last decade. Load balancing will lead to reduce processing time and memory usage that are the most two concerns of the network companies in now days, and they are the most two factors that determine if the approach is worthy applicable or not. There are two kinds of load balancing, distrib...

There is an increasing demand for IT resources in growing business enterprises. Data center virtualization helps to meet this by driving higher server utilization and utilizing un-used CPU cycles without causes much increase new servers. Reduction infrastructure complexities, Optimization of cost system management, power cooling are some the additional benefits virtualization. Virtualization al...

This paper presents an online demo of evolutionary programming using a mixed mutation strategy for solving function optimization problems. The strategy combines three different mutation operators: Gaussian, Cauchy and Lévy mutations. The algorithm has been implemented by a client-server web application, which is convenient for users to access through Internet. The web application architecture i...