Recent Question/Assignment

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.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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?
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Describe Striping, Mirroring and Parity.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Exercise 2: Storage Design (2 marks)
Summarize storage repository design based on the following video link:
https://www.youtube.com/watch?v=eVQH7C3nulY
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
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?
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

What are the 4 main components of the ISS?
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

How cache works in ISS?
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
What are the advantages of SAN over NAS?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
What are two common NAS file sharing protocols? How they are different from each other?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

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?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
In your opinion how FCoE is cost effective than traditional connection – give brief explanation.
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

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?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
What is IP SAN protocols and FibreChannel over IP (FCIP)?
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
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