基于PS排隊模型的單臺流媒體服務(wù)器性能分析
發(fā)布時間:2019-01-05 00:05
【摘要】:在有限容量的M/M/1/N處理機共享(processor-sharing,PS)模型基礎(chǔ)上,引入等待隊列,建立了單臺服務(wù)器的性能評價模型.首先,通過求解系統(tǒng)微分方程,推導(dǎo)出穩(wěn)態(tài)下用戶平均服務(wù)響應(yīng)時間和平均排隊等待時間的表達(dá)式;然后,通過引入穩(wěn)態(tài)時平均等待時間閾值和平均服務(wù)時間閾值,并按照服務(wù)質(zhì)量好壞由用戶評價的原則,提出了一種服務(wù)器性能評價方案,為服務(wù)器的設(shè)計提供了定量參考依據(jù);最后,在并發(fā)用戶數(shù)N=1和N→∞這兩種情況下,計算出性能評價模型中用戶平均服務(wù)響應(yīng)時間和平均排隊等待時間的值,并與典型的M/M/1排隊模型以及無限容量的M/M/1-PS模型中的相應(yīng)結(jié)果進行了比較.
[Abstract]:Based on the finite capacity M/1/N processor sharing (processor-sharing,PS) model, the performance evaluation model of a single server is established by introducing the waiting queue. First, by solving the differential equations of the system, the expressions of the average service response time and the average queue waiting time of the users under steady state are derived. Then, by introducing the mean waiting time threshold and the average service time threshold, and according to the principle that the quality of service is evaluated by the user, a server performance evaluation scheme is proposed. It provides a quantitative reference for the design of the server. Finally, the average service response time and queue waiting time of the users in the performance evaluation model are calculated under the two cases of concurrent user number Nu 1 and N N 鈭,
本文編號:2400985
[Abstract]:Based on the finite capacity M/1/N processor sharing (processor-sharing,PS) model, the performance evaluation model of a single server is established by introducing the waiting queue. First, by solving the differential equations of the system, the expressions of the average service response time and the average queue waiting time of the users under steady state are derived. Then, by introducing the mean waiting time threshold and the average service time threshold, and according to the principle that the quality of service is evaluated by the user, a server performance evaluation scheme is proposed. It provides a quantitative reference for the design of the server. Finally, the average service response time and queue waiting time of the users in the performance evaluation model are calculated under the two cases of concurrent user number Nu 1 and N N 鈭,
本文編號:2400985
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