Paper Info
Title
Simulating Layer-4 Load Balancing Strategies in Web Clusters
Abstract
Nowadays there exists an explosive demand of Internet web services. As a consequence, the traditional web server architecture based on a single machine (monoprocessor or multiprocessor system) is usually not sufficient to handle this increasing load because the single server upgrading process is complex, also becoming a single point of failure. Clusters of web servers, namely web clusters, connected by a fast local area network, arc emerging as an alternative for building highly scalable and high available Internet web services. This type of architecture is more scalable, more reliable and cost-effective than a single server. However, there are a lot of challenges that must be addressed to tune and increase the performance of this kind of systems. More precisely, the way workload is distributed among servers in the cluster is a crucial factor that affects global performance. Performance evaluation may be based on analytical modeling or simulation modeling. Each of them differs in their scope and applicability. However, the simulation modeling technique offers more freedom and flexibility than the other methods. In order to predict the performance of web clusters, we have implemented a very flexible and easy to use simulator that takes into account several configuration parameters. This tool can be used for both academical and research purposes. In this paper, the authors present a brief description of the employed simulation language, the queueing model in which the simulator is based on, the main input parameters and output variables, and some aspects about the internal design of the implemented tool. Finally, some experimental results obtained by using this tool are shown.
Year
Venue
Keywords
2002
ESM
layer-4 load,web clusters,load balance
DocType
ISBN
Citations 
Conference
90-77039-07-4
0
PageRank 
References 
Authors
0.34
1
2
Name
Order
Citations
PageRank
Xavier Molero1497.19
Vicente Santonja216818.21