A Performance Analysis of Disk Based Computer Systems by Tandem Queueing Model

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概要

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• A tandem queueing model for a performance analysis of disk based computer systems which work under a multiprogramming environment is discussed. Assuming that all input/output (I/0) requests from a central processing unit (CPU) are processed by moval head disk storage devices, channels of this system can be considered as two-stage tandem channels, that is, first channels are storage units and second channels are control units. Then, the systems are modeled by use of a technique of a tandem queue. The model is approximately represented as M/M/S_1→M/S_2 under assumptions that service times at a CPU, first channels and second channels are exponentially distributed independent random variables , where S_l and S_2 are number of the first and the second channels respectively. Furthermore, the model has features of a finite waiting room M/M/1(N), where N is a degree of multiprogramming. A CPU productivity is defined with a equilibrium state probability. Compared with measured and calculated data of the CPU productivity, a model validation is discussed in the case of N≦S_1.

• 一般社団法人情報処理学会の論文

著者

• Noguchi Shoichi

  Tohoku University

• Oizumi Juro

  University Of Electro-communication

• Noguchi Shoichi

  Tohoku Univ. Research Institute Of Electrical Communication

• Tomita Shingo

  Yamaguchi University

• Miyazaki Masatoshi

  Tohoku University

関連論文

• A Consideration Of Integrated System Management In OSI Environment
• A DESIGN OF A MULTIPROCESSOR SYSTEM USING MULTIPLE COPIED MEMORIES
• A Performance Analysis of Disk Based Computer Systems by Tandem Queueing Model
• On Performance Evaluation of Multiprogramming Systems

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