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    Call/WhatsApp/Text +1(838)201-9170

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      • About Apax Researchers
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    Helping the world grow since 2012
    Call/WhatsApp/Text +1(838)201-9170

    • HOME
    • ABOUT
      • About Apax Researchers
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      • Why Choose Us
      • Contact Us
    • BECOME A WRITER
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    A start-up company, which has developed an interactive Electric Vehicle (EV) Charging station search mobile application, wants you to provide advice on a suitable cloud deployment model. The company anticipates that its users will be distributed across the City of Newcastle upon Tyne. The company currently owns no existing hardware infrastructure. The company needs answers to the following questions: i) The run-time performance (e.g., application response time, hosting cost) trade-off based on the type of cloud deployment model the company opts for from the following available options: private, public and hybrid. [10 Marks] ii) Once a particular type of cloud deployment model is selected, the company needs to decide a type of virtualisation technology which can be used to host the backend (server-side) of the mobile application. Out of the hypervisor-based and containerbased virtualisation technologies, which will be the most suitable in terms of ease of application orchestration life cycle management and why. [10 Marks]

    May 10, 2022

    Question 1
    a) A start-up company, which has developed an interactive
    Electric Vehicle (EV) Charging station search mobile application,
    wants you to provide advice on a suitable cloud deployment
    model. The company anticipates that its users will be distributed
    across the City of Newcastle upon Tyne. The company currently
    owns no existing hardware infrastructure. The company needs
    answers to the following questions:
    i) The run-time performance (e.g., application response time,
    hosting cost) trade-off based on the type of cloud deployment
    model the company opts for from the following available options:
    private, public and hybrid. [10 Marks]
    ii) Once a particular type of cloud deployment model is selected,
    the company needs to decide a type of virtualisation technology
    which can be used to host the backend (server-side) of the
    mobile application. Out of the hypervisor-based and containerbased virtualisation technologies, which will be the most suitable
    in terms of ease of application orchestration life cycle
    management and why. [10 Marks]
    b) An application has an average load of 20 servers, Peak load
    is 30, lowest load is 10, public cloud cost is £0.05 per hour per
    server, and private datacentre cost is £0.04 per hour per server.
    Using the above information, calculate the cost per hour of:
    i) Running the application in a public cloud and private
    datacentre. [8 Marks]
    ii) Cloudbursting: running the lowest load in a private datacentre
    and the rest in a public cloud [4 Marks]
    Comment on the result of cloudbursting to show whether it is
    suitable for the given application or not. (Use percentage
    increment or decrement to analyse the result.) [8 marks]
    [CSC8110]

    Question 2
    a) Explain why performance monitoring in a hybrid cloud
    deployment is more challenging than the public cloud
    deployment model. [6 marks]
    b) Explain how cloud network virtualisation paradigm (e.g.,
    software-defined networking) differs from cloud server
    virtualisation paradigm (e.g., hypervisors, containers). [4 marks]
    c) You are given a task of building a web application cluster
    based on the virtual machine-based cloud datacentre
    architecture. The web application cluster includes three main
    software components (see Figure 1): “Web server”, “App server”
    and “Database server” as shown in Figure 1. Given this context,
    please answer the following questions related to the selection
    and deployment of the web application cluster.
    Figure 1: A web application cluster hosted on virtualmachine based cloud datacentre
    i) A types of image alternative are available for “Web server”, B
    types of image alternative are available for “App server”, and C
    types of image alternative are available for “Database server”.
    Given the above context, discuss and analyse the complexity
    “M” WEB SERVER IMAGE TYPES
    “P” APP SERVER IMAGE TYPES
    “L” DATABASE SERVER IMAGE TYPES
    T3.MEDIUM T3.LARGE M5.LARGE M5.XLARGE C5.LARGE
    “N” Virtual Machine (VM) Instance Types
    Web Server
    Throughput – 300 Requests/Sec
    App Server
    Throughput – 800 Requests/Sec
    Database Server
    Throughput – 1000 Requests/Sec
    Virtual Machine Image Repository
    [CSC8110]
    of a Brute Force (fully exhaustive) image selection algorithm
    (Step 1, Step 2, and Step 3 in Figure 1), which evaluates every
    image alternative available for a software component (i.e. Web
    server, App server, and Database server) to arrive at a solution
    that is globally optimal while meeting the numerical (e.g.,
    licencing price) and non-numerical (e.g., virtualisation format,
    operating system version, software feature) selection
    constraints. [4 marks]
    ii) Explain how the MapReduce programming paradigm can be
    applied to speed up the Brute Force image selection algorithm.
    [6 marks]

    Question 3
    Figure 2 shows a container-based (Docker) web application
    cluster. In this cluster, there is a need to route traffic to multiple
    microservices or load-balance across multiple ports on the same
    physical host. Based on the above context, answer the following
    questions:
    Figure 2: Docker-based web application cluster
    i) Which type of load-balancer would you deploy and why?
    [4 marks]
    [CSC8110]
    Page 5 of 6
    ii) What approaches you may employ to pinpoint the root
    causes for slow application response time and/or
    application throughput? [4 marks]
    iii) Before deploying the microservices, you need to
    understand and analyse their run-time performance.
    Describe a methodology that could be applied to do so.
    [6 marks]
    iv) Given that microservices need to communicate with
    other remote microservices hosted in a remote cloud
    datacentre, please discuss the approach that could be
    used to create a wide-area networking of distributed
    microservices. The approach should be supported by the
    Docker containerisation technology. [6 marks]

    Question 4
    A supermarket (e.g. PC World) logs each purchase made by
    customers who are using their website. Each entry is a tuple
    consisting of the customer’s unique identifier, their Post Code,
    and the product they have purchased. The company wishes to
    use Apache Hadoop (MapReduce programming model). Given
    this context answer the following questions:
    a) Sketch the pseudo code for answering the following analytical
    queries:
    i) How many times has each product been purchased?
    [6 Marks]
    ii) How many customers are there from a given post-code?
    [6 Marks]
    b) Explain the workflow of analytical query execution using a
    sequence diagram. [8 Marks]
    END

     

     

     

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