What is the response time for jobs in observed system

Assignment Help Basic Computer Science
Reference no: EM1361635

We observe a closed system for 30 minutes, during which 1600 tasks are completed, from 12 terminals. Each terminal (source of tasks) has a think time of 12s between receiving the response to one task, and submitting the next task. The system has a CPU and two disks, one is fast, the other is slow. The fast disk can deliver a block in 1/2 of the time that the slow disk would take. During the observation period, 32000 accesses occur at the fast disk, and 12000 accesses at the slow disk. During the observation period, the CPU is busy for 1080s, the fast disk is busy for 400s, and the slow disk is busy for 600s.

a) What is the response time for jobs in the observed system?

b) As a function of N, the number of terminals, what are the high-load bounds for throughput and response time?

c) As a function of N, what are the low-load bounds for throughput and response time?

d) How many terminals can we support, while keeping the response time below 3 s?

e) Suppose we plan to replace the CPU with a CPU whose speed is double (thus the time to execute each job would decrease so it becomes 1/2 of the current time). Estimate the number of terminals we can support, with response time below 3s.

f) Propose a design that can support 45 terminals with response time below 3s.

Reference no: EM1361635

Previous Q& A

  Why us health care system is good

Describe five health issues we might face over the next 20 years, and provide solutions to those problems. List and describe briefly five reasons why, the U.S. health care system is good.

  Illustrate what happens to the price received by sellers

Solve for the new equilibrium. Illustrate what happens to the price received by sellers, the price paid by buyers, and the quantity sold.

  Policy analysis-stakeholder alternatives

Policy Analysis-Stakeholder Alternatives - How does a policy analyst differentiate between ideal and practical alternatives for a stakeholder

  Prepare a schedule showing unit and total depletion

Cleanburn Coal Corporation bought coal-leasing land that contains 800,000 tons of coal for $21,700,000. Soil test through geologist cost $35,250 for the purchased land, but test at other sites that yielded negative results cost $116,250.

  How close does the proton get to the line of charge

What is the coefficient of the kinetic friction of the tires and pavement.

  American red cross and american heart association

What is the culture within the American Red Cross and American Heart Association? How are the two organizations similar or different? What can the managers at each organization do to change the culture of their organization?

  Strategic management - an integrated approach

In approximately analyse the book, apply what the author(s) say(s) to concepts learned from the textbook Strategic Management

  Draw a flowchart to determine fare

Write an algorithm to find the bus fare based on distance travelled as per the following rates:a. Rs.5.00 for first 2 kms.

  Cardiovascular disease and cancer

Some people feel cardiovascular disease and cancer are beyond one's control. List three points of information that may convince a person that he/she can reduce the risk of getting those diseases .

  How long does it take for the last car to come to rest

How long does it take for the last car to come to rest. When catching a baseball, a catcher's glove moves by 11 cm along the line of motion of the ball. If the baseball exerts a force of 403 N on the glove, how much work is done by the ball.

Reviews

Write a Review

 

Similar Q& A

  How many register window should be saved to memory as result

Assume two more calls are made after the maximum value from part (a) is reached. How many register windows must be saved to memory as a result?

  Explain computer viruses spread by email or other methods

Explain computer viruses spread via email or by other methods. What negative consequences can they have on an organization's operations?

  Determining accurate formula using undetermined coefficients

Determine a more accurate formula for f'(t) using method of undetermined coefficients. Let's say the formula is of the form f'(t)= Af(t + 2h) + Bf(t + h) - Bf(t - h) - Af(t - 2h).

  Condition to resume sending messages related to application

Give an example that illustrates why P must not be allowed to do so and state a condition that defines when P may resume sending messages related to application.

  Explaining service strategy or service design

Select a topic that most interests you from Service Strategy or Service Design and then write a paper around that topic. Try to use as much of your own creativity and originality when writing the paper.

  Explaining seven steps of information gathering

Write and explain the seven steps of information gathering.

  Why information technology is a business pressure

Explain in detail why Information Technology (IT) is a business pressure and also an enabler of response activities.

  Stage of ec purchase decision-making process

Banner advertising on Websites helps trigger a realization taht there is a gap between reality and a desired state, which occurs in the ______ stage of the EC purchase decision-making process.

  Explaining threat category

An individual threat can be represented in more than one threat category. If a hacker hacks into a network, copies a few files.

  Procedural structure of a simple inventory-accounting system

Using a structure chart, recognize the procedural structure of a simple inventory/accounting system for a small store (perhaps a rivately owned curio shop in a resort community)

  Structured analysis and object-oriented techniques

A frequently asked question is "Can structured techniques and object-oriented techniques be mixed?

  Factors finding whether something is politically feasible

Describe political feasibility. What factors go into determining whether something is politically feasible in an organization? Answers may include whether a sponsor exists

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd