ITECH 2201 Cloud Computing
School of Science, Information Technology & Engineering
Workbook for Week 7 (Storage)
Please note: All the efforts were taken to ensure the given web links are accessible. However, if they are broken – please use any appropriate video/article and refer them in your answer
Part A (3 Marks)
Exercise 1: Storage Methods (1 mark)
From your lecture and also based on the below given video link:
https://www.youtube.com/watch?v=_sXkTSiAe-A
Write a paragraph about memory virtualization.
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Watch the below mentioned YouTube link:
https://www.youtube.com/watch?v=wTcxRObq738
Based on the video answer the following questions:
What is RAID 0?
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Describe Striping, Mirroring and Parity.
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Exercise 2: Storage Design (2 marks)
Summarize storage repository design based on the following video link:
https://www.youtube.com/watch?v=eVQH7C3nulY
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Below YouTube link describes the Intelligent Storage System
https://www.youtube.com/watch?v=raTIRsMi7zk
Based on the watched video answer the following questions:
What is ISS?
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What are the 4 main components of the ISS?
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How cache works in ISS?
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Storage Area Network (SAN) and Network Attached Storage (NAS) are widely used concepts in data storage arena. The following YouTube video links gives detailed description of these concepts:
- http://www.youtube.com/watch?v=csdJFazj3h0
- http://www.youtube.com/watch?v=vdf6CvGQZrk
- https://www.youtube.com/watch?v=KxdfGcynfJ0
- https://www.youtube.com/watch?v=4RsLUTJ_Qtk
Based on the watched videos answer the following questions:
Describe NAS and SAN briefly using diagrams?
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What are the advantages of SAN over NAS?
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What are two common NAS file sharing protocols? How they are different from each other?
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Part B (3 Marks)
Exercise 3: Storage Design (1 Mark)
Design Storage Solution for New Application
Scenario
An organization is deploying a new business application in their environment. The new application requires 1TB of storage space for business and application data. During peak workload, application is expected to generate 4900 IOPS (I/O per second) with typical I/O data block size of 4KB.
The vendor available disk drive option is 15,000 rpm drive with 100 GB capacity. Other specifications of the drives are:
Average Seek time = 5 millisecond and data transfer rate = 40 MB/sec.
You are required to calculate the required number of disk drives that can meet both capacity and performance requirements of an application.
Hint: In order to calculate the IOPS from average seek time, data transfer rate, disk rpm and data block size refer slide 28 in week 6 lecture slide. Once you have IOPS, refer slide 29 in week 6 to calculate the required number of disks.
Exercise 4: Storage Evolution (2 Marks)
Watch the following videos for Fiber Channel over Ethernet and answer the questions that follow:
- http://www.youtube.com/watch?v=hSFyf-rmjA8
- http://www.youtube.com/watch?v=iCfJCzfNLrw
What is FCoE and why we need FCoE?
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In your opinion how FCoE is cost effective than traditional connection – give brief explanation.
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You have read and answered about SAN in part A – based on your understanding and with some research effort answers the following questions:
What is a Virtual SAN?
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What is IP SAN protocols and FibreChannel over IP (FCIP)?
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Watch the below video about Introduction to Object-based and Unified Storage and:
https://www.youtube.com/watch?v=kl9X6mzEWO4
Choose the correct answer from the following questions:
What is an advantage of a flat address space over a hierarchical address space?
a. Highly scalable with minimal impact on performance
b. Provides access to data, based on retention policies
c. Provides access to block, file, and object with same interface
d. Consumes less bandwidth on network while accessing data
What is a role of metadata service in an OSD node?
a. Responsible for storing data in the form of objects
b. Stores unique IDs generated for objects
c. Stores both objects and objects IDs
d. Controls functioning of storage devices
What is used to generate an object ID in a CAS system?
a. File metadata
b. Source and destination address
c. Binary representation of data
d. File system type and ownership
What accurately describes block I/O access in a unified storage?
a. I/O traverse NAS head and storage controller to disk
b. I/O traverse OSD node and storage controller to disk
c. I/O traverse storage controller to disk
d. I/O is directly sent to the disk
What accurately describes unified storage?
a. Provides block, file, and object-based access within one platform
b. Provides block and file storage access using objects
c. Supports block and file access using flat address space
d. Specialized storage device purposely built for archiving
ITECH 2201 Cloud Computing
School of Science, Information Technology & Engineering
Workbook for Week 8
Please note: All the efforts were taken to ensure the given web links are accessible. However, if they are broken – please use any appropriate video/article and refer them in your answer
Part A (3 Marks)
Exercise 1: Green Computing (0.5 Marks)
The questions in this exercise can be answered by doing internet search and/or from the YouTube videos. Answer to each question should be one paragraph in your own words.

What is Greenhouse effect?
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We are legally, ethically, and socially required to green our IT products, applications, services, and practices – is this statement true? Why?
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What is Green IT and what are the benefits of greening IT?
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Exercise 2: Environmental Sustainability (0.5 Marks)
Read the article in the below link and answer the questions that follow:
http://www.computer.org/csdl/mags/it/2010/02/mit2010020004.html

According to the article how do you build a greener environment?
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Summarize the article in 150 words
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Exercise 3: Environmentally Sound Practices (1 Mark)
The questions in this exercise can be answered by doing internet search.
Briefly explain the following terms – a paragraph for each term:
? Power usage effectiveness (PUE) and its reciprocal
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? Data center efficiency (DCE)
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? Data center infrastructure efficiency (DCiE)
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List 5 universities who offers Green Computing course. You should name the university, the course name and the brief description about the course.
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Exercise 4: Major Cloud APIs (1 Mark)
The following companies are the major cloud service provider: Amazon, GoGrid, Google, and Microsoft.

List and briefly describe (3 lines for each company) the Cloud APIs provided by the above major vendors.
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Part B (3 Marks)

Exercise 1: Greening IT Standards and Regulations (0.5 Marks)
To design green computers and other IT hardware – the following standards and regulations are mainly used EPEAT (www.epeat.net), the Energy Star 4.0 standard, and the Restriction of Hazardous Substances Directive (https://www.gov.uk/guidance/rohs-compliance-and-guidance). Use the link provide with some internet search – summarize each standards and regulations in 150 words.
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Exercise 2: Green cloud computing (0.5 Marks)
Xiong, N.; Han, W.; Vandenberg, A, -Green cloud computing schemes based on networks: a survey,- Communications, IET, vol.6, no.18, pp.3294,3300, Dec. 18 2012
Most part of power consumption in data centers comes from computation processing, disk storage, network and cooling systems. Nowadays, there are new technologies and methods proposed to reduce energy cost in data centers. From the above paper summarize (in 300 words) the recent work done in these fields.
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Exercise 3: Cloud API Functionalities (2 Marks)
List the functionalities that can be achieved by using the APIs mentioned in the following link:
https://code.google.com/p/sainsburys-nectar-api/
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What API is used in the following link and how it is used?
https://pypi.python.org/pypi/python-novaclient
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Openstack is an open source collaborative software project which meets many of the cloud needs. Below links gives vast information about Openstack.
? https://support.rc.nectar.org.au/docs/openstack
? http://docs.openstack.org/api/quick-start/content/
Write a report (1 page) about the Openstack features and functionalities.
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