Overview of Cloud Computing

2.  Computing
 Cloud Computing
 Cloud Components
 Applications
 Why to Opt Cloud Computing?
 Disadvantages of Cloud Computing
 Characteristics of Cloud Computing
 Service Models
 Deployment Models

3.  The process of utilizing computer technology to complete
a task.
 Computing may involve computer hardware and/or
software, but must involve some form of a computer
system.
 Examples can be
• Swiping a debit card
• sending an email or
• using a cell phone

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6.  Cloud computing is a computing paradigm shift where
computing is moved away from personal computers or an
individual application server to a “cloud” of computers.
 It is a service that charges based on the amount of
computing resources that we use.
 The name comes from the use of a cloud-shaped symbol
as an abstraction for the complex infrastructure it contains
in system diagrams.

7.  Cloud computing is a model for enabling
• Ubiquitous,
• Convenient,
• On-demand network access
to a shared pool of configurable computing resources (e.g., networks,
servers, storage, applications, and services) that can be rapidly
provisioned and released with minimal management effort or
service provider interaction.

8. • Shared pool of configurable computing resources
• On-demand network access
• Provisioned by the Service Provider
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9. Clients.
Data Center (Collection of Servers where the application to
which you subscribe is housed).
Internet.

10. • Email
– Gmail, Yahoo mail
• Online Collaboration tools
– Google docs for collaboration on documents
– Google Hangouts for video conferencing
• Big Data Analytics
– Provides a cost effective and scalable infrastructure to support big data and
business analytics.
• Test and Development
– now readily available environments tailored for your needs at your
fingertips.
• Storage

11. • Several large Web companies (such as Amazon and Google)
are now exploiting the fact that they have data storage
capacity that can be hired out to others.
• This approach, known as cloud storage allows data stored
remotely to be temporarily cached on desktop computers,
mobile phones or other Internet-linked devices.
• Amazon’s Simple Storage Solution (S3) is a well known
example.
19th May, 09 mark.baker@computer.org

12. • Provides secure, durable, highly-scalable cloud storage.
• Amazon S3 Standard for general-purpose storage of
frequently accessed data
• Amazon S3 Standard - Infrequent Access (Standard - IA) for
long-lived, but less frequently accessed data
• Amazon Glacier for long-term archive.

13.  Lower computer costs:
• You do not need a high-powered and high-priced computer to run cloud
computing's web-based applications.
• Since applications run in the cloud, not on the desktop PC, your desktop PC
does not need the processing power or hard disk space demanded by traditional
desktop software.
• When you are using web-based applications, your PC can be less expensive,
with a smaller hard disk, less memory, more efficient processor...
 Device independence.:
• You are no longer restricted to a single computer or network.
• Move to a portable device, and your applications and documents are still
available.
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14.  Improved performance:
• With few large programs hogging your computer's memory, you will see better
performance from your PC.
• Computers in a cloud computing system boot and run faster because they have
fewer programs and processes loaded into memory…
 Reduced software costs:
• Instead of purchasing expensive software applications, you can get most of
what you need for free-ish!
• most cloud computing applications today, such as the Google Docs suite.
• better than paying for similar commercial software
• which alone may be justification for switching to cloud applications.
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15.  Instant software updates:
• Another advantage to cloud computing is that you are no longer faced with
choosing between obsolete software and high upgrade costs.
• When the application is web-based, updates happen automatically
• available the next time you log into the cloud.
• When you access a web-based application, you get the latest version
• without needing to pay for or download an upgrade.
 Improved document format compatibility:
• You do not have to worry about the documents you create on your machine
being compatible with other users' applications or OSes
• There are potentially no format incompatibilities when everyone is sharing
documents and applications in the cloud.
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16.  Unlimited storage capacity:
• Cloud computing offers virtually limitless storage.
• Your computer's current 1 Tbyte hard drive is small compared to the hundreds
of Pbytes available in the cloud.
 Increased data reliability:
• Unlike desktop computing, in which if a hard disk crashes and destroys all your
valuable data, a computer crashing in the cloud should not affect the storage of
your data.
• if your personal computer crashes, all your data is still out there in the
cloud, still accessible
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17. Universal document access:
• That is not a problem with cloud computing, because you do not take your
documents with you.
• Instead, they stay in the cloud, and you can access them whenever you have a
computer and an Internet connection
• Documents are instantly available from wherever you are
Latest version availability:
• When you edit a document at home, that edited version is what you see when you
access the document at work.
• The cloud always hosts the latest version of your documents
• as long as you are connected, you are not in danger of having an outdated
version
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18. Requires a constant Internet connection:
• Cloud computing is impossible if you cannot connect to the Internet.
• Since you use the Internet to connect to both your applications and documents,
if you do not have an Internet connection you cannot access anything, even
your own documents.
Does not work well with low-speed connections:
• Similarly, a low-speed Internet connection, such as that found with dial-up
services, makes cloud computing painful at best and often impossible.
• Web-based applications require a lot of bandwidth to download, as do large
documents.
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19. Stored data might not be secure:
• Limited knowledge of the physical location of stored data.
• Multi-tenant platform.
• Limited capabilities for monitoring access to applications hosted on cloud.
Features might be limited:
• This situation is bound to change, but today many web-based applications
simply are not as full-featured as their desktop-based applications.
• For example, you can do a lot more with Microsoft PowerPoint than
with Google Presentation's web-based offering
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20. Can be slow:
• Even with a fast connection, web-based applications can sometimes be slower
than accessing a similar software program on your desktop PC.
• Everything about the program, from the interface to the current document, has
to be sent back and forth from your computer to the computers in the cloud.
• If the cloud servers happen to be backed up at that moment, or if the Internet is
having a slow day, you would not get the instantaneous access you might
expect from desktop applications.
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21. Characteristics - 5
Services models - 3
and
Deployment Models - 4

22. • On-demand self-service
• Ubiquitous network access
• Location-independent resource pooling
• Rapid elasticity
• Measured service with flexible pricing models
(Pay as per usage)
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23. • Service Models describe the type of services that the service
provider is offering.
• Three types of Service Models are there:
– Software as s Service (SaaS)
– Platform as a Service (PaaS)
– Infrastructure as a Service (IaaS)

24. Clients
SaaS
PaaS
IaaS
S
Cloud Service
Stack
E R V E R S

25. Infrastructure as a service (IaaS) is a cloud computing model that offers / provides
users access to computing resources such as servers, storage, and networking.
Organizations use their own platforms and applications within a service provider’s
infrastructure.
Key features:
• Instead of purchasing hardware outright, users pay for IaaS on demand.
• Infrastructure is scalable depending on processing and storage needs.
• Saves enterprises the costs of buying and maintaining their own hardware.
• Because data is on the cloud, there is no single point of failure.
• Enables the virtualization of administrative tasks, freeing up time for other work.

26. • IaaS is also sometimes referred to as Hardware as a Service (HaaS).
• Beneficial for startup or small business.
• For bursty and dynamic loads, cost savings will be significant.
BENEFITS:
• The user can buy the infrastructure according to the requirements at any particular
point of time instead of buying the infrastructure that might not be used for months
• Dynamic scaling
• Usage based pricing
• Reduced costs
• Access to superior IT resources

27.  Amazon
 Rackspace
 Gogrid
 GoDaddy
 Joyent
 Microsoft Sql Services

28. Platform as a service (PaaS) is a cloud computing model, in which the cloud provider
offers and manages programming languages, frameworks, libraries, and tools for the
end user to develop, manage, and deliver applications. In addition to storage and
other computing resources, users are able to use a suite of prebuilt tools to develop,
customize and test their own applications.
Key features:
• PaaS provides a platform with tools to test, develop, and host applications in the
same environment.
• Enables organizations to focus on development without having to worry about
underlying infrastructure.
• Providers manage security, operating systems, server software, and backups.
• Facilitates collaborative work even if teams work remotely.

29. Pros:
• Set up environments and deploy apps very quickly.
• Infrastructure and Platform manages by service provider.
Cons:
• The difficulty with PaaS is that it locks the developer( and the customer)
into a solution that is dependent upon the platform vendor.
• An application written in Python against Google’s API using the Google
App engine is likely to work only in that environment.

30.  Google App Engine
 Windows Azure
 Microsoft .Net Services
 Cisco Webex Connect
 Longjump
 Force.com

31. Software as a service (SaaS) is a cloud computing offering that provides users with
access to a vendor’s cloud-based software. Users do not install applications on their
local devices. Instead, the applications reside on a remote cloud network accessed
through the web or an API. Through the application, users can store and analyze data
and collaborate on projects.
Key features:
• SaaS vendors provide users with software and applications.
• Users do not have to manage, install, or upgrade software; SaaS providers
manage this.
• Data is secure in the cloud; equipment failure does not result in loss of data.
• Use of resources can be scaled depending on service needs.
• Applications are accessible from almost any Internet-connected device, from
virtually anywhere in the world.

32. Pros:
• No longer have to install, update and maintain the software's.
• No data is lost if computer breaks.
• Access apps and data from any connected end points.
• No license required.
• Automatic upgrades and updates and patch management.
• All users have the same version of the software so each user’s software
is compatible with others.

33.  Google Drop box
 Google docx
 Google Drives
 Google talk
 Salesforce.com

34. Salesforce.com
• Formed by Oracle employees in 1999.
• To create a CRM (Customer Relationship Management)
System.
• Then it was created as a hosted software based on cloud
computing model.

37. • This refers to the location and management of the
infrastructure.
• There are four deployment models.
– Private Cloud
– Public Cloud
– Community Cloud
– Hybrid Cloud

38. • The cloud infrastructure is operated solely for an organization.
• It may be managed by the organization or a third party
• It may exist on premise or off premise.
• Exp: Healthcare, Security Agencies, Govt. Agencies
• Amazon also provides the option of a virtual private cloud.

39. Pros:
• Security: The cloud belongs to a single client. Hence, the infrastructure and systems
can be configured to provide high levels of security.
• Controls & Flexibility: Better controls for data, users and information assets.
• Performance: Normally private clouds are deployed inside the firewall of the
organization’s intranet which ensures efficiency and good network performance.
Cons:
• Cost: Costs are substantial in the case of building an on premise private cloud.
• Under-utilization: In some instances, the resources subscribed can be under-utilized.
Hence, optimizing the utilization of all resources is a challenge
• In case of natural disaster and internal data theft the private cloud may be prone to
vulnerabilities.

40. • The cloud infrastructure is made available to the general public or a large
industry group and is owned by an organization selling cloud services.
• IBM Blumix
• Salesforce
• Gmail
• Amazon EC2

41. Pros:
• Simple and Scalable: Public clouds are available as a service in the internet, they are
easy to deploy.
• Cost: Initial investment is very low or nil.
• No maintenance: The hardware and networks are maintained by the cloud services
provider. Internal IT staffs have no responsibility in maintaining the infrastructure.
And less time is required.
Cons:
• Lacks proper controls: The client has no control of data or infrastructure.
• Performance: The performance of the network depends on the speed of the internet
connectivity.
• Weak on Security: Since the hardware resource is shared between multiple users, IT
security I issues are more profound and data is vulnerable to thefts.

42. • More than one entity involved.
• The cloud infrastructure is shared by several organizations and supports
a specific community that has shared concerns (e.g., mission, security
requirements, policy, and compliance considerations).
• It may be managed by the organizations or a third party.

43. Pros:
• This helps to further reduce costs as compared to a private
cloud, as it is shared by larger group.
• Various state-level government departments requiring access
to the same data relating to the local population or
information related to infrastructure, such as hospitals, roads,
electrical stations, etc., can utilize a community cloud to
manage applications and data.

44. • The cloud infrastructure is a composition of two or more clouds
(private, community, or public) that remain unique entities but are
bound together by standardized or proprietary technology that enables
data and application portability.

45. • This deployment model helps businesses to take advantage of secured
applications and data hosting on a private cloud, while still enjoying scalability
and cost benefits by keeping shared data and applications on the public cloud.
• For migrating workloads between public and private hosting without any
inconvenience to the users.
• For example, an organization might use a public cloud service, Amazon S3 for
archived data but continue to maintain in-house storage for operational customer
data.
• Facebook uses 2 clouds Public & Private (tagged as private and public)

46. Questions???