Page 1 of 4 RMIT Classification: Trusted School of Computing Technologies COSC2626/2640 Cloud Computing Assessment 3 Assessment Type: Individual assignment; no group work. Submit online via Canvas → Assignments → Assessment 3. Clarifications/updates may be made via announcements and relevant discussion forums. Due Date: Week 13, Friday 3rd June 2022, 11:59pm. Weighting: 90 marks that contributes 30% of the total assessment. Note: Questions 5, 10 and 14 have two versions, one for COSC2626, the other for COSC2640. You only need to attempt the ones coded for your course. 1. Overview For this assignment you are required to demonstrate your understanding of concurrency, parallel processing, and data centre infrastructure. 2. Learning outcomes This assessment is relevant to the Course Learning Outcomes CLOs 4 ~ 6. 3. Assessment details This assessment will determine your ability to 1. Understand the concepts taught over Week 10 to Week 12 of the course. 2. Work independently in self-directed study to research the identified issues. 4. Submission Prepare the answers to this assignment in an electronic format and convert to a single Acrobat PDF (.pdf) file for submission, with the filename being your student number (e.g., S1234567.pdf) containing all the answers to all the questions in this assignment. Paper submissions are not accepted; if some parts of the assignment have been completed by hand, scan these in and include this in your electronic submission. You should submit your assignment via Canvas Assignments Assessment 3 Submission. You may resubmit the assignment if you need to, only the most recent version will be marked. Please note the following. 1. Clearly number each answer according to the numbering in this assignment specification (e.g., Q1a, Q1b, Q1c, etc.). Page 2 of 4 RMIT Classification: Trusted 2. Use at least 11-point font size. 3. It is your responsibility to correctly submit your files. Please verify that your submission is correctly submitted by downloading what you have submitted to see if your submitted file includes the correct content. 4. Never leave submission to the last minute – you may have difficulty uploading files. 5. You can submit multiple times – a new submission will override any earlier submissions. However, if your final submission is after the due time, late penalties will apply. 5. Academic integrity and plagiarism (standard warning) Do not ever simply copy and paste what another writer has written. This is stealing. What we need is your own words – your own understanding. All plagiarism will be penalised, there are no exceptions and no excuses. You have been warned. 6. Rubric and marking guidelines Submission files not in the required format will not be marked. A penalty of 10% per day of the total available marks will apply for each day being late. After 5 days, you will receive zero mark for the assignment. If you want to seek an extension of time for assignment submission, you must have a substantial reason for that, such as unexpected circumstances. Reasons such as, unable to cope with study load, is not substantial. Also, you must apply for an extension as soon as possible. Last minute extensions cannot be granted unless it attracts special consideration. Please find out how to apply for special consideration online at https://www.rmit.edu.au/students/student-essentials/assessment-and-results/special- consideration/eligibility-and-how-to-apply Any student wishing an extension must go through the official procedure for applying for extensions and must apply at least a week before the due date. Do not wait till the submission due date to apply for an extension. The rubric can be found in Canvas Assignments Assessment 3. 7. COSC2626 vs COSC2640 questions This assignment has 14 questions and students are required to answer all questions. Note that questions 5, 10 and 14 have two versions, one for COSC2626, the other for COSC2640. You only need to do the ones coded for your course. Page 3 of 4 RMIT Classification: Trusted Before You Start Do not copy from lecture notes. Use your own words and clearly demonstrate your understanding. Concurrency and parallel processing (30 marks) 1. (8 marks) Explain the difference between data and task parallelism with examples. Discuss the parallel processing architectures that best suit these two types of parallelism, respectively. 2. (4 marks) In a multicore system with multiple hardware threads, is it useful if the OS is aware of the hardware threads? Explain how this helps improve system performance. 3. (6 marks) Multiprocessors may use a shared queue or private queues (one for each of the processors). Discuss the advantage and disadvantage of using a shared ready queue and private queues. 4. (6 marks) Briefly explain how sum reduction works. In addition to the difference on communication methods (shared memory vs message passing), what is the key difference between shared memory and message passing multiprocessors performing sum reduction? 5. COSC2626 only. (6 marks) CPU, GPU and DPU are commonly used in the cloud for a variety of tasks. Discuss the kind of tasks that best suits each of the processors. 5. COSC2640 only. (6 marks) CPU, GPU and DPU are commonly used in the cloud for a variety of tasks. Discuss what parallel processing architectures these processors use and why. Datacentre infrastructure (60 marks) 6. (6 marks) Briefly describe how the Internet is structured, listing the key devices. 7. (6 marks) Discuss what makes a Tier-1 ISP and how ISP and CSP networks are connected. What is the financial implication? Page 4 of 4 RMIT Classification: Trusted 8. (10 marks) Explain how Internet protocols are organised, and its benefits and weaknesses. According to the organisation, what are the protocols that need to be processed by intermediate nodes such as routers and switches (ignore security concerns or special purposes). 9. (8 marks) From network topology point of view, discuss and explain the similarity and the difference between institutional networks and data centre networks. 10. COSC2626 only. (6 marks) A data centre may provide many different applications and services at the same time, such as search engine, web hosting, email, video streaming, etc. As a result, it has to handle a tremendous number of requests for these different applications. Describe how the requests are distributed and handled. 10. COSC2640 only. (6 marks) A data centre may provide many different applications and services at the same time, such as search engine, web hosting, email, video streaming, etc. Discuss if it is a good idea to expose the servers to the clients, that is, allowing clients to contact these servers directly. Explain your choice. 11. (6 marks) You are tasked to design the tools for live VM migration within a data centre. Discuss and compare the data transfer protocols that you may use. 12. (6 marks) In video streaming over HTTP such as YouTube, there is a large variation in the amount of bandwidth available to a client, across different clients or over time for the same client. Is this an issue? Explain how a streaming protocol would handle this issue. 13. (6 marks) Suppose you are visiting a news website. The news agency has its video content hosted in a third-party data centre, say, AWS. While reading a piece of news, you clicked a video link. Describe the procedure how the video clip was retrieved. 14. COSC2626 only. (6 marks) When a client sends a request to a CDN, the CDN needs to determine the server that is going to provide the requested content. Discuss how the server may be determined as well as the corresponding issues. 14. COSC2640 only. (6 marks) A CDN hosts both static and dynamic content. Some is of local significance while some is of global significance. Discuss where the different types of content are stored as well as server capacity implication.
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