Building a server cluster is one of the methods to provide high availability web server. However, not all of the servers in the cluster are utilized continuously. This condition leads to wasted energy consumed by unused servers. Therefore, to prevent excessive power consumption we need to optimize energy usage. This paper proposes an automated power optimization in high availability server clus...

This paper investigates the optimal placement of proxies of a Web server on the Internet, with the consideration of both read and update operations to the data on the Web server. We first study the problem of optimal placement of k proxies in a system to minimize the total access cost to the Web server. Then, for an unknown number of proxies, we find the optimal number of proxies required in th...

The growing complexity of the Web information flow makes it necessary to improve Client/Server communication. In order to efficiently maintain heterogeneous and fast changing data types and different kinds of data sources, a Smart Data Server (SDS) can be used as a general framework for distributed functionality. In this paper, we present three general methods of advanced Client/Server communic...

The paper presents a distributed computing system that is based on evolutionary algorithms and utilizing a web browser on a client’s side. Evolutionary algorithm is coded in JavaScript language embedded in a web page sent to the client. The code is optimized with regards to the memory usage and communication efficiency between the server and the clients. The server side is also based on JavaScr...

The Job-Shop Scheduling Problem (JSSP) is well known for its complexity as an NP-hard disjunctive scheduling problem. The problem addressed in this paper is JSSPs with an objective of minimizing makespan while satisfying a number of hard constraints. An efficient GRASP ELS approach is introduced for solving this problem. The efficiency is evaluated using the widely known 40 Laurence’s instances...