Queuing Network Approximation Technique for Evaluating Performance of Computer Systems with Input to Terminals
摘要：Queuing network techniques are effective for evaluating the performance of computer systems. We discuss a queuing network technique for a computer system with input to terminals. The finite number of terminals exists in the network and a job arrives randomly from outside of the terminal. After a think-time at the terminal, the job moves to the server, and it acquires some parts of memory and executes CPU and I/O processing in the server. After the job completes CPU and I/O processing, it releases the memory and goes back to its own terminal. However, because the terminal and the memory resource can be considered as a secondary resource for the CPU and I/O equipment, the queuing network model has no product form solu-tion and cannot be calculated the exact solutions. We proposed here an approximation queuing network technique for calculating the performance measures of a computer system with input to terminals on which multiple types of jobs exist. This technique involves dividing the network into two levels; one is "inner level" in which a job executes CPU and I/O processing, and the other is "outer level" that includes terminals and communication lines. By dividing the network into two levels, we can prevent the number of states of the network from increasing and approximate the performance measures of the network. We evaluated the proposed approximation technique by using numerical experiments and clarified the characteristics of the system response time and the mean number of jobs in both level.
The 6th International Conference on Literature, Languages, Humanities and Social Sciences （L2HSS-17）; the 6th International Conference on Studies in Law, Education, Business and Hospitality Management （LEBHM-17）; the 6th International Conference on Chemical, Agricultural, Environmental and Biological Sciences （CAEBS-17）; the 6th International Conference on Computer, Control, Communication and Manufacturing Engineering （CCCME-17）; the 6th International Conference on Mechanical, Aeronautical and Industrial Engineering （MAIE-17）
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