Calculate the access speeds after the track requests

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Reference no: EM133422178

Question 1. Imagine that you are managing a university system that becomes CPU-bound at the conclusion of each school semester. If you were allowed to double the number of processors, what effect on throughput would you expect? If you could make one additional change to the system, what would it be? Explain why you'd expect your changes to improve performance?

Question 2. Using the information below,

- CPU X = 0.2 ms (the average time to execute 1,000 instructions)

- Drive A = 0.6 ms (average data access speed)

- Drive B = 3 ms (average data access speed)

- Drive C = .02 ms (average data access speed)

Calculate I/O access speed using this CPU and each of the disk drives as they evaluate the following track requests in this order: 16, 4, 9, 16, 29, 31, 5. Then, in each case, calculate the access speeds after the track requests are reordered and rank the three disk drives before and after reordering.

Question 3. Using the information below,

CPU W = 3 ms (the average time to execute 1,000 instructions)

Drive A = 4 ms (average data access speed)

Drive B = 2 ms (average data access speed)

Drive C = 10 ms (average data access speed)

Drive D = 6 ms (average data access speed)

Calculate I/O access speed using this CPU and each of the four disk drives as they evaluate the following track requests in this order: 0, 31, 20, 15, 20, 31, 15. Then, in each case, calculate the access speeds after the track requests are reordered and rank the four disk drives before and after reordering.

Reference no: EM133422178

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