DTGOV migration to IaaS in AWS PDF

Running head: DTGOV MIGRATION TO IAAS IN AWS
DTGOV migration to IaaS in AWS
Name of the Student
Name of the University
Author Note

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Table of Contents
Background of the Case Study...................................................................................................2
1. Initial Webserver....................................................................................................................2
1.1 DTGOV web servers in an IaaS instance.........................................................................2
1.1.1 How the selected DTGOV webservers will work in an IaaS instance in the AWS
Cloud environment.............................................................................................................3
1.1.2 How will this move affect user of these web services..............................................4
1.1.3 Benefits to the Users.................................................................................................5
1.2 Types of Cloud Architectures..........................................................................................6
1.2.1 Types of Cloud Architectures useful for DTGOV as part of their webserver
infrastructure in the Cloud.................................................................................................6
1.2.2 How the current DTGOV infrastructure could be replicated or replaced in a Cloud
deployment.........................................................................................................................8
2. Office 365...............................................................................................................................9
2.1 Benefits and issues that DTGOV customers, and their users, would achieve from
moving to Office 365 as their office automation suite...........................................................9
2.2 How a cloud-based approach will differ from providing this suite from an on premise
data centre..............................................................................................................................9
3. SharePoint............................................................................................................................10
3.1 What are the major differences between the models IaaS, PaaS and SaaS?..................10
3.2 Recommend the model that you consider most appropriate for this service and discuss
why this model is the most appropriate for the SharePoint service?...................................11
3.3 What are the most likely problems that DTGOV will encounter with the model that you
recommend? How would you advise DTGOV to deal with these issues?...........................11
References................................................................................................................................13

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Background of the Case Study
The organization of DTGOV is a public company that specializes in the IT services.
The organization has numerous employees working under them while the company on the
other hand deals with the handling and management on in house data. The organization keeps
in expanding each year and also is most likely to expand in the near future as well. However,
it has been found that the organization has mostly been expanding on the newest technology
on the physical level, which has proven to be extremely expensive for the organization to
renew their licences for using the new technologies in the organization (Sharma et al., 2018).
Lately, the organization is keen on implementing a cloud computing platform as a solution to
the problem regarding expenses in handling the new physical technology changes. The
organization right now provides its services to the customers through a physical presence,
however, they are trying to migrate some of their servers on the web to the IaaS instances in
Amazon Web Services or AWS for testing this strategy that the organization has been
planning on investing. The full migration would be conducted at first with the help of an
initial plan to determine the kind of architecture that would be required to support the web
services. This would be conducted through a report that would help in preparing the
specification and requirement for the initial web server, the preparation of Office 365 and
SharePoint specifications.
1. Initial Webserver
1.1 DTGOV web servers in an IaaS instance
DTGOV understands it need for migrating the web servers to IaaS instance for the
cloud computing infrastructure provided by AWS. For this particular migration, DTGOV has
to make sure about the specification of the web server that they use. The migration of the web

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servers in an IaaS instance requires the specification of the web servers for understanding
which of the web servers would be appropriate to utilize and work effectively after the
implementation. DTGOV would go through testing processes afterwards to understand if the
implementation procedure has been following the requirements of the entire transformation to
the AWS server (Ranjan et al., 2015). Following would be explanation of how the selected
web servers would work in the IaaS instance in the AWS cloud environment:
1.1.1 How the selected DTGOV webservers will work in an IaaS instance in the AWS
Cloud environment
The DTGOV web servers would first be selected to be migrated to the IaaS instance.
The cloud infrastructure provides various facilities to the physical web servers as initially it
works for the organization as physical entities for hosting the SQL Server software. The IaaS
instance would be entirely controlled over the cloud environment and would form a
collection of these physical servers to form a private virtual web server instance. The thus,
the organization would not need any physical existence of the web servers and any issues
regarding the physical existence of the web servers would be eliminated from the business
infrastructure (Kavis et al., 2013). Previously, the hosting of the SQL servers would happen
over several machines for hosting, however, after the implementation of the IaaS instance, the
entire framework of the servers would be hosted by the cloud instance, which would only
require the handling of the servers run with the help of a single SQL instance. Thus, it can be
clearly stated that the web servers would work the same in the IaaS instance, only, the
physical existence of the servers would no longer be found and the handling of the servers
would not need multiple machines, but only one console that would view each instance
separately functioning in the virtual cloud.

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1.1.2 How will this move affect user of these web services
With the implementation of the physical web servers to be migrated into the IaaS
instance, the organization of DTGOV would be heavily affect regarding its business and the
employees equally. Infrastructure as a Service or IaaS provides a cloud computing model that
helps in maintenance of an entire business infrastructure and DTGOV would be making a
wise investment by migrating the physical web servers to the IaaS instance. The following
would be the effects of the migration to the users:
 Investments: The users would experience no further investment to be made
on the web servers in manually or physically maintaining the web servers
given the migration into cloud. Usually they had to create their own sets of
data for the reliably larger software systems. As a result, a number of
personnel were needed as well. These would be absolutely eradicated since the
instances would now be able to handle the servers through a single console
that would require only one person to handle and manage the data sets.
 Easy customer maintenance: It is found that most on premise packages are
evenly distributed to various customers. DTGOV used to handle customers
individually before since the customers needed individual assistance because
of the physical existence of the servers. On top of that, there were incidences
where the customer support was difficult to attain because DTGOV did not
access to the customer environment (Joshi & Shah, 2019). The implementation
plan would thus provide support to the organization as deploying the
applications would be easier and updating or delivering updates to all the
customers about the downtime information would be much easier because of
the virtual existence of the server. Since, DTGOV has 3,000 employees and

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branch offices in more than 300 localities, with three data centres running both
mainframe and low-level platform environments, it would be much difficult
for the organization to individually handle each of the customers.
 On demand facilities: The organization and the customer would both be
affected by this particular change as before, DTGOV used to go through a lot
of hardships to perform on demand and on premise installations because of the
unknown load patterns. Now, the current implementation would facilitate the
capacity provisioning in a much simpler and flexible way.
1.1.3 Benefits to the Users
The users would also be benefitted by this particular migration process of the
organization to the IaaS instance in the AWS. DTGOV servers a huge amount of customers,
90% of which comprises of the customer portfolio of public organizations that typically do
not have the autonomy or the agility to switch operating methods on such short notice
(Gholami et al., 2017). This is why, DTGOV has been thinking about migrating their own
business servers to the cloud so that they can provide better services to their clients and
customers. Following would be the benefits associated with the migration of DTGOV that
would facilitate or benefit the user:
Distributed resources as a service: IaaS instances would provide the users with the
appropriate hardware and the provisioning software which would allow them in having a
unified setup to work like they have their own data centres through the provisioning of the
virtual network switches and other virtual devices as their own.
Expansion benefits: The organization of DTGOV is based on IT services and thus it
would require internet for accessing. When DTGOV would implement the IaaS Instance, it
would mean that the company would be endowed with powerful virtual servers, storage

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capacities, and networking technologies to accommodate all the needs of the clients
(Mansour, Bouchachia & Cooper, 2017). This would make them serve their customers on-
demand and hence provide the organization with better scalability and greater agility with
respect to the ever changing customer needs and business scenario.
Multiple use on single hardware: IaaS instance on AWS allows the users to access
their work over remote access. The modern business demands require the users to be much
more flexible and agile and the remote access control provides the users the same advantages.
Provision of access even with the server down: IaaS infrastructure in cloud provides
extreme reliability to the users even when the server goes down and thus, even when the
users experience a hardware fail or experiences the data centre going offline, it would still not
affect the users in accessing the internet.
1.2 Types of Cloud Architectures
1.2.1 Types of Cloud Architectures useful for DTGOV as part of their webserver
infrastructure in the Cloud
The types of cloud architectures that would be useful for DTGOV as the part of their
web server infrastructure in the cloud or the IaaS instance can be listed as follows:
 Load Balancing: This particular setup of cloud architecture usually refers to
the distribution of the requests from the customers across a multiple set of
application servers that would be running through the cloud environment. As
the name suggest, the load balancing in cloud would enable the maximization
of the application performance and provide reliability to DTGOV. The
architecture provides the organization to attend the clients on demand and

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even then the resources would be extremely low in cost and the scaling of the
up or down of applications would match the demands or both the organization
and the clients.
 Amazon CloudFront: Amazon CloudFront is regarded as a speedy Content
Delivery Network or CDN which delivers data in the most secured way
possible. It just not helps in delivering data over networks, but also includes
that of videos and dynamic web content like .html, .css, .php images and other
media files. It allows low latency and high performance.
 Elastic Load Balancer: The AWS Elastic Load balancer is a cloud
architecture that makes use of a three-tier structure that automatically helps in
the distribution of the application traffic (Khosravi, Toosi & Buyya, 2017).
With the use of this particular method, DTGOV would be able to
automatically distribute the incoming application traffic across multiple
targets, including the IaaS instances. Along with that the application would
also be able to monitor the health for the registered targets and the traffic
routes to the healthy targets.
 Security Management: This AWS cloud architecture provides the
appropriate models to DTGOV for managing the required performance of the
utilized tools and strategies and provides a security system to the cloud
models, which in this can is the Infrastructure as a Service or IaaS.
 Amazon RDS: Amazon Relational Database Service or Amazon RDS cloud
architecture provides an easy setup for the infrastructure, better operation and
scales for a relational database within the cloud.

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1.2.2 How the current DTGOV infrastructure could be replicated or replaced in a
Cloud deployment
With the help of the following steps, the present DTGOV infrastructure can be
replicated or replaced in the deployment of the cloud architecture:
 The actual objectives of the business and the benefits of the business operations
should be discussed and as a result, these would further be discussed in the
preliminary phase of the development for the business case to find out if its needs
to be developed or not before the migration plan.
 The IT portfolio in this case would be understood to develop the migration
strategies that would be required in developing in this particular phase.
 After having a foundational experience over the migration process, the
deployment process would accelerate. Different partners such as could help in
migration.
 When the initial idea about the migration plan is founded, the acceleration would
proceed for the deployment of the plan (Linthicum, 2016). The organization
would be backed by the various partners like Atadata, Attuinity, Racemi and
CloudVelox who would help DTGOV with the entire migration plan.
 In the final stage, the old systems would be terminated so that the existing systems
should be iterated for habituating the organization into a modern operating model.

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2. Office 365
2.1 Benefits and issues that DTGOV customers, and their users, would achieve
from moving to Office 365 as their office automation suite
Following would be the selected benefits that the organization of DTGOV would
experience along with the users if they move towards Office 365 as their office automation
site:
 It would be easier to scale the business services over Office 365
 The application allows the devices and the organization along with the users to
work from any place and at any time (Sharma et al., 2015)
 The services provided by the application are easier to collaborate
 The application helps in reducing the real-time updates as well as reduces the
send capitals
 As any other cloud based application, this also removes the utilization of
hardware and thus reduces the energy costs.
2.2 How a cloud-based approach will differ from providing this suite from an on
premise data centre
There are many instances that the migration process would differ from the provision
of this suite from an on premise data centre as there would be the following issues based on
this particular instance. These could be listed as follows:
 They would provide hybrid solutions and there would be problems based on
syncing, implementing add-ons as well as implementing the legal solutions
 Some applications would not be available on the cloud as they would require
Publisher and Access (Carrasco, Durán & Pimentel, 2017).

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 Support system might not deal with all kinds of support request.
 Management of bulk files is a critical issue.
 Determining of number of used applications and a specific purpose is a
continuous problem.
3. SharePoint
3.1 What are the major differences between the models IaaS, PaaS and SaaS?
SaaS: This is the most agile method for cloud service with a great abstraction level. It
makes sure that the users are connected to use the cloud based applications over web and the
software deployment and management are assigned to third party services. Typically, they are
available on subscription basis.
PaaS: This operates at a much lower level of abstraction and usually comes with a
platform on which the software can be created and launched (Khoshkbarforoushha et al.,
2016). It provides the users with a self-service provision for the provision of a computer
infrastructure.
IaaS: This is the most agile cloud computing model that helps in building a virtual
data centre within the cloud environment with various resource capabilities (García et al.,
2016). The virtual machines can also be accessed through remote access as well at any point
of time and anywhere.
3.2 Recommend the model that you consider most appropriate for this service
and discuss why this model is the most appropriate for the SharePoint service?
Based on consideration over the three cloud service model, the IaaS is considered as
the most preferable model. The inclusion of IaaS services within the SharePoint service is

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important because helps the users in scaling up of the requirements of the company of
DTGOV and provides remote access to the employees (Menzel et al., 2015). The resources
would include hard disk, storage space, virtual network switches, IP addresses, vLANs and
CPU cores.
3.3 What are the most likely problems that DTGOV will encounter with the
model that you recommend? How would you advise DTGOV to deal with these
issues?
Following are the most likely problems that DTGOV will encounter with the IaaS
model:
 The model can face problems with privacy and security issues
 There are issues with the legal and regulatory problems
 There is no experience found for experience and benchmarking
 There is no sense of interoperability
 Tracking and communicating ambiguity
 Threat over reliability on a single provider of IT service
 Resistance of the company over the change in the company business structure
As a solution to the problem, it could be said that DTGOV can implement the use of a
risk identifier and risk management infrastructure to identify any problem that might hamper
the mitigation process and include this in the continuous strategy of the framework in the
business (Villamizar et al., 2016). The current costs should be calculated to fit the
comparison on the Return on Investments. The organization should also try to implement an
infrastructure to develop better customer relationship to understand the changing needs.

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References
Carrasco, J., Durán, F., & Pimentel, E. (2017). Component-wise application migration in
bidimensional cross-cloud environments.
García-Galán, J., Trinidad, P., Rana, O. F., & Ruiz-Cortés, A. (2016). Automated
configuration support for infrastructure migration to the cloud. Future Generation
Computer Systems, 55, 200-212.
Gholami, M. F., Daneshgar, F., Beydoun, G., & Rabhi, F. (2017). Challenges in migrating
legacy software systems to the cloud—an empirical study. Information Systems, 67,
100-113.
Joshi, N., & Shah, S. (2019). A Comprehensive Survey of Services Provided by Prevalent
Cloud Computing Environments. In Smart Intelligent Computing and
Applications (pp. 413-424). Springer, Singapore.
Kavis, M. J., Erl, T., Puttini, R., Mahmood, Z., Dadmehr, M. D., Nait-Ali, A., ... & Sweet, L.
H. (2013). Architecting the Cloud: Design Decisions for Cloud Computing Service
Models (SaaS, PaaS, and IaaS).
Khoshkbarforoushha, A., Wang, M., Ranjan, R., Wang, L., Alem, L., Khan, S. U., &
Benatallah, B. (2016). Dimensions for evaluating cloud resource orchestration
frameworks. Computer, 49(2), 24-33.
Khosravi, A., Nadjaran Toosi, A., & Buyya, R. (2017). Online virtual machine migration for
renewable energy usage maximization in geographically distributed cloud data
centers. Concurrency and Computation: Practice and Experience, 29(18), e4125.

13DTGOV MIGRATION TO IAAS IN AWS
Linthicum, D. S. (2016). Moving to autonomous and self-migrating containers for cloud
applications. IEEE Cloud Computing, 3(6), 6-9.
Mansour, I. E. A., Bouchachia, H., & Cooper, K. (2017, August). Exploring Live Cloud
Migration On Amazon EC2. In 2017 IEEE 5th International Conference on Future
Internet of Things and Cloud (FiCloud) (pp. 366-371). IEEE.
Menzel, M., Ranjan, R., Wang, L., Khan, S. U., & Chen, J. (2015). CloudGenius: a hybrid
decision support method for automating the migration of web application clusters to
public clouds. IEEE Transactions on Computers, 64(5), 1336-1348.
Ranjan, R., Benatallah, B., Dustdar, S., & Papazoglou, M. P. (2015). Cloud resource
orchestration programming: overview, issues, and directions. IEEE Internet
Computing, 19(5), 46-56.
Sharma, P., Lee, S., Guo, T., Irwin, D., & Shenoy, P. (2015, April). Spotcheck: Designing a
derivative iaas cloud on the spot market. In Proceedings of the Tenth European
Conference on Computer Systems (p. 16). ACM.
Sharma, P., Lee, S., Guo, T., Irwin, D., & Shenoy, P. (2018). Managing risk in a derivative
IaaS cloud. IEEE Transactions on Parallel and Distributed Systems, 29(8), 1750-
1765.
Villamizar, M., Garces, O., Ochoa, L., Castro, H., Salamanca, L., Verano, M., ... & Lang, M.
(2016, May). Infrastructure cost comparison of running web applications in the cloud
using AWS lambda and monolithic and microservice architectures. In 2016 16th
IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing
(CCGrid) (pp. 179-182). IEEE.

14DTGOV MIGRATION TO IAAS IN AWS
Gonzales, D., Kaplan, J. M., Saltzman, E., Winkelman, Z., & Woods, D. (2017). Cloud-trust
—A security assessment model for infrastructure as a service (IaaS) clouds. IEEE
Transactions on Cloud Computing, 5(3), 523-536.
Tyagi, R. (2017). Security Aspects of Cloud Migration. International Journal of Engineering
Science, 13137.
Mansour, I., Sahandi, R., Cooper, K., & Warman, A. (2016, March). Interoperability in the
heterogeneous cloud environment: A survey of recent user-centric approaches.
In Proceedings of the International Conference on Internet of things and Cloud
Computing (p. 62). ACM.
Muller, C. J., & Davis, A. C. (2016). NoSQL Application Redesign may be Unnecessary for
Most Corporation Cloud Migration Deployments. International Journal of Cloud
Applications and Computing (IJCAC), 6(4), 36-64.