a single server queue with bernoulli vacation has been considered. in addition the admission to queue is based on a bernoulli process and the server gives two type of services. for this model the probability generating function for the number of customers in the queue at different server's state are obtained using supplementary variable technique. some performance measures are calculated. ...

A server caching strategy is proposed based on LRU, which uses the replaced page-id as the major information rather than the request page-id. So the server cache is seen to clients as a long virtual client LRU cache extended to the server. Since the replaced page-id is only sent to the server by piggybacking whenever a new page fetch request is sent, its additional overheads are minimal. We sho...

This article discusses recent experiences with the Numeral Unit Spread Assessment Pedigree (NUSAP) system for multidimensional uncertainty assessment, based on four case studies that vary in complexity. We show that the NUSAP method is applicable not only to relatively simple calculation schemes but also to complex models in a meaningful way and that NUSAP is useful to assess not only parameter...

CHALLENGES FACING WEB SERVERS Current Web servers must: • Connect with various systems such as groupware, database management systems, mobile agent engines, and transaction processing monitors. • Integrate generic communication environments including Common Object Request Broker Architecture (CORBA) and Distributed Component Object Model (DCOM) • Extend server functionality by introducing addit...

In a client-server system, the minimum bandwidth required to transmit a pre-recorded VBR media can be computed in O(n). As the frame number n is usually very large, this resource management procedure is not suitable for online computation. Although an O(nlogn) algorithm has been proposed to characterize the bandwidth-buffer tradeoff for the optimal resource management (a native algorithm takes ...

Introduction Virtualization is widely used in consolidation projects and as a basis for new server deployments. The benefits in energy efficiency, space, cooling as well as cost are immediately apparent, as many applications don't require the full computational power of even the smallest available new server today. However, in addition to all these benefits, virtualization also introduces some ...

in this research, both resource allocation and reactive resource allocation problems in multi-server dynamic pert networks are analytically modeled, where new projects are expected to arrive according to a poisson process, and activity durations are also known as independent random variables with exponential distributions. such system is represented as a queuing network, where multi servers at ...

Substantiation and verification of the energy economic calculations for solar power plants require initial data experimental results. The paper proposes a device developed monitoring processing information from panel facility. facility aims to obtain reliable models designed assess resource indices used justify performance in eastern regions Russia. characteristics panels has additional capabil...