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Modeling and Performance Analysis of Dispatching Policies in Dispatcher-Based Web Server Cluster 被引量:1

Modeling and Performance Analysis of Dispatching Policies in Dispatcher-Based Web Server Cluster
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摘要 There are two kinds of dispatching policies in content-aware web server cluster; segregation dispatching policy and mixture dispatching policy. Traditional scheduling algorithms all adopt mixture dispatching policy. They do not consider that dynamic requests' serving has the tendency to slow down static requests' serving, and that different requests have different resource demands, so they can not use duster's resource reasonably and effectively. This paper uses stochastic reward net (SRN) to model and analyze the two dispatching policies, and uses stochastic Petri net package (SPNP) to simulate the models. The simulation results and practical tests both show that segregation dispatching policy is better than mixture dispatching policy. The principle of segregation dispatching policy can guide us to design efficient scheduling algorithm. There are two kinds of dispatching policies in content-aware web server cluster; segregation dispatching policy and mixture dispatching policy. Traditional scheduling algorithms all adopt mixture dispatching policy. They do not consider that dynamic requests' serving has the tendency to slow down static requests' serving, and that different requests have different resource demands, so they can not use duster's resource reasonably and effectively. This paper uses stochastic reward net (SRN) to model and analyze the two dispatching policies, and uses stochastic Petri net package (SPNP) to simulate the models. The simulation results and practical tests both show that segregation dispatching policy is better than mixture dispatching policy. The principle of segregation dispatching policy can guide us to design efficient scheduling algorithm.
出处 《Wuhan University Journal of Natural Sciences》 EI CAS 2006年第3期591-595,共5页 武汉大学学报(自然科学英文版)
基金 Supported by the National Natural Science Foun-dation of China (90204008) the Science Council of Wuhan(20001001004)
关键词 Web server cluster stochastic reward net mixture dispatching policy segregation dispatching policy Web server cluster stochastic reward net mixture dispatching policy segregation dispatching policy
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