The document provides an overview of cloud computing, including: - A definition of cloud computing as the migration of computing services from on-premises datacenters to remote systems located on the internet where customers pay for only the resources they consume. - Descriptions of the essential characteristics of cloud computing including on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. - Explanations of the three cloud service models of SaaS, PaaS, and IaaS. - Details of the four cloud deployment models of private, public, community, and hybrid clouds. - Discussions of the advantages of cloud computing such as cost

1. Ahmed Ellithy
Introduction to
Cloud Computing

3. From
ground to
cloud
The Back Story

6. • Content is stored on THAT computer
• To use content must return to THAT computer
• Cannot access this content from another
device or computer
Internal Storage

7. • Purchase programs.
• Load to the computer.
• Each computer would need the program
loaded and stored on the internal drive .
Programs

8. External Storage
External Hard Drive
CD/DVD Thumb Drive
SD Card Micro SD Card
 Allows your content to become mobile.
 Save to the storage device.
 Take device to any compatible computer.
 Open and use content.

9. • Multiple work stations talk to one unit that stores
information and data.
• Data is not saved to the C: drive, but to a network
drive.
• Can retrieve the data stored to the network from any
of the connected workstations.
Networked Storage

10. The Traditional Server Concept
Web Server
Windows
IIS
App Server
Linux
Glassfish
DB Server
Linux
MySQL
EMail
Windows
Exchange

11. The Traditional Server Concept
• System Administrators often talk about servers as a
whole unit that includes the hardware, the OS, the
storage, and the applications.
• Servers are often referred to by their function i.e. the
Exchange server, the SQL server, the File server,
etc.
• If the File server fills up, or the Exchange server
becomes overtaxed, then the System Administrators
must add in a new server.

12. The Traditional Server Concept
• Unless there are multiple servers, if a service
experiences a hardware failure, then the service
is down.
• System Admins. can implement clusters of
servers to make them more fault tolerant.
However, even clusters have limits on their
scalability, and not all applications work in a
clustered environment.

13. And if something goes wrong ...
Web Server
Windows
IIS
App Server
DOWN!
DB Server
Linux
MySQL
EMail
Windows
Exchange

14. The Virtual Server Concept
Hypervisor layer between Guest OS and hardware
Virtual servers seek to encapsulate the server software away from the hardware.
-This includes the OS, the applications, and the storage for that server.

15. • Virtualization:
– The ability to run multiple operating systems
on a single physical system and share the
underlying hardware resources.

16. Virtualization
• Virtual workspaces:
– An abstraction of an execution environment that can be made
dynamically available to authorized clients by using well-defined
protocols,
– Resource quota (e.g. CPU, memory share),
– Software configuration (e.g. O/S, provided services).
• Implement on Virtual Machines (VMs):
– Abstraction of a physical host machine,
– Hypervisor intercepts and emulates instructions from VMs, and allows
management of VMs,
– VMWare, Xen, etc.
• Provide infrastructure API:
– Plug-ins to hardware/support structures Hardware
OS
App App App
Hypervisor
OS OS
Virtualized Stack

18. Hypervisor - Software that controls the layer between the hardware
operating systems.
It allows multiple operating systems to run on the same physical
hardware.
There are two types of hypervisors:
Bare metal: which allows the hypervisor to run directly on the
hardware.
hosted architecture: in which the hypervisor runs on top of an existing
operating system.

19. The Virtual Server Concept
• Virtual servers seek to encapsulate the server software away from the hardware.
-This includes the OS, the applications, and the storage for that server.
• Virtual servers can still be referred to by their function i.e. email server, database
server, etc.
• A computer on which a hypervisor is running one or more virtual machines is
defined as a host machine.
• A hypervisor is a piece of computer software, firmware or hardware that creates
and runs virtual machines.
• Each virtual machine has a guest operating systems, which is managed by
the hypervisor.
• If the environment is built correctly, virtual servers will not be affected by the loss
of a host.
• Hosts may be removed and introduced almost at will to accommodate
maintenance.

20. Welcome
to the
New World
of
Cloud
Computing

21. Cloud Computing
Cloud Computing : The migration of computing services provided
by on-premises datacenters to remote systems located on the
Internet.
•The customer is charged only for resources consumed (pay as used
and on demand).
•It is an internet based service delivery model which provides internet
based services, computing and storage for users in all markets
including financial, health care and government.
•Cloud computing is defined as dynamically scalable computing
resources that are available over the Internet.
Clients can:
•Put their data on the platform instead of on their own desktop
PCs and/or on their own servers.
•They can put their applications on the cloud and use the servers
within the cloud to do processing and data manipulations etc.

22. • An Internet connection
• An account - Created with a user name and a
password
• Agree to Terms
The Cloud Requires

23. • When you do a “save as” on your computer, you
choose where to save the material.
Saving documents
Internal Storage
External Storage
Network

24. • Create an Account –
User name and
password
• Content lives with the
account in the cloud.
• Log onto any computer
with Wi-Fi to find your
content.
Cloud Storage

25. • Download a cloud based app to a computer you own
• The app lives on your Computer
• Save files to the app
• When connected to the Internet it will sync with the
cloud
• The Cloud can be accessed from any Internet
connection
Downloads for storage

26. • Do “save as” to save a file to your computer and the
cloud
• The syncing folders makes data retrieval easier
• Box and DropBox require this download to work
Save file as

27. • Log-in to the online storage account
• Click upload a file
• Find the file on hard drive, network, or external storage
• Upload to cloud storage
Upload Documents
5 GB
5 GB
2 GB
7 GB

28. • Creation is happening in the cloud
• Saving is going to the cloud
• To retrieve files, must return to the cloud
Internet is required

29. Internet capable Devices

30. • Saving Large Files
• Multiple file types – Photos, videos, presentations,
docs
• Back-up of stored files
• File Sharing
• Access from devices
• Nothing to forget (thumb drive, cd)
• Project collaboration
Benefits

31. Cloud Computing Cont’
Clouds were built for a number of reasons:
•Shared Computing.
•Shared memory.
• Shared Storage and access resources.
Cloud Providers deploy multi-tenancy to achieve efficient utilization
of resources , while decreasing cost.
From a consumers perspective, they need to use resources as much
and as far as needed while being able to increase or decrease
resources consumption based on real time basis.
Cloud Computing model meets these demands and restrictions by
delivering two key characteristics:
•Multi-tenancy
•Elasticity

32. Cloud Multi-tenancy Model
Multi-tenancy implies sharing of computational resources, storage,
services, and applications with other tenants, residing on same
physical or logical platform at provider’ premises.

33. Elasticity

34. NIST :National Institute of Standards and Technology
• The role of (NIST) in cloud computing is to promote the
effective and secure use of the technology within
government and industry by providing technical guidance
and promoting standards.
• NIST provides NIST's definition of cloud computing as well as
related guidance.
• This definition will serve as a foundation for NIST's upcoming
publication on cloud models, architectures, and deployment
strategies.
• NIST is responsible for accelerating the U.S. Federal
Government’s secure adoption of cloud computing.
• In order to execute this responsibility, NIST is leading a
number of efforts to develop cloud standards and guidelines,
in close consultation and collaboration with standards bodies,
the private sector, and other stakeholders.

35. The NIST definition of cloud computing (SP 800-145,
September 2011)
Cloud computing is a model for enabling 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.
This cloud model promotes availability and is defined
in terms of
1) 5 essential characteristics.
2) 3 service models.
3) 4 deployment models.

36. The Essential Cloud Characteristics are: Five
• On-demand self-service
• Broad network access
• Resource pooling
-Location independence
• Rapid elasticity
• Measured service
The Cloud Service Models are: Three
• Software as a Service (SaaS) – Use provider’s applications over a
network
• Platform as a Service (PaaS) – Deploy customer-created
applications to a cloud
• Infrastructure as a Service (IaaS) – Rent processing, storage,
network capacity, and other fundamental computing resources

37. The Cloud Deployment Models are: Four
• Private cloud: enterprise owned or leased
•Community cloud: shared infrastructure for specific
community
•Public cloud: sold to the public, mega-scale
infrastructure
• Hybrid cloud: composition of two or more cloud types

39. 5 Essential Characteristics:
On-demand self-service: A consumer can unilaterally provision computing capabilities,
such as server time and network storage, as needed automatically without requiring
human interaction with each service provider.
Broad network access: Capabilities are available over the network and accessed through
standard mechanisms that promote use by heterogeneous thin or thick client platforms
(e.g., mobile phones, tablets, laptops, and workstations).
Resource pooling: The provider’s computing resources are pooled to serve multiple
consumers using a multi-tenant model, with different physical and virtual resources
dynamically assigned and reassigned according to consumer demand. There is a sense of
location independence in that the customer generally has no control or knowledge over
the exact location of the provided resources but may be able to specify location at a
higher level of abstraction (e.g., country, state, or datacenter). Examples of resources
include storage, processing, memory, and network bandwidth.
Rapid elasticity: Capabilities can be elastically provisioned and released, in some cases
automatically, to scale rapidly outward and inward commensurate with demand. To the
consumer, the capabilities available for provisioning often appear to be unlimited and can
be appropriated in any quantity at any time.
Measured service: Cloud systems automatically control and optimize resource use by
leveraging a metering capability at some level of abstraction appropriate to the type of
service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage
can be monitored, controlled, and reported, providing transparency for both the provider
and consumer of the utilized service.

40. Cloud Service Models
41
Software as a
Service (SaaS)
Platform as a
Service (PaaS)
Infrastructure as a
Service (IaaS)
Google App
Engine
SalesForce CRM
LotusLive
Adopted from: Effectively and Securely Using the Cloud Computing Paradigm by peter Mell, Tim Grance

44. Delivery Models
45
While cloud-based software services are maturing,
Cloud platform and infrastructure offering are still in their early stages !
From [6] Cloud Security and Privacy by Mather and Kumaraswamy

50. The Cloud Deployment Models

51. Current Leaders
Key Players in Cloud Computing Platforms (adapted from Lakshmanan (2009))
Company Cloud Computing
Platform
Year of
Launch
Key Offering
Amazon.com AWS (Amazon Web
Services)
2006 Infrastructure as a service (Storage
Computing), Datasets and Content
Distribution
Microsoft Azure 2009 Application platform as a service (.Net,
SQL data services )
Google Google App. Engine 2008 Web Application Platform as Service
IBM
Salesforce.com
Blue Cloud Force.com 2008 Proprietary 4GL Web application as an
demand platform

52. Library Services using Cloud
Mendeley
Worldcat
Research Gate
ExLibris
Google Scholar
Library Thing
Dropbox

53. Google Apps
Google Sites, Google Docs, Google Calendar, Google Chat…

61. Cloud Storage Comparison
Storage Service Comparison on a Annual Basis
Service
Provider
Free First Payment tier Second Payment
tier
Amazon 5GB 20GB ($10) 50GB ($25)
Apple iCloud 5GB 25GB ($40) 50GB ($100)
Box 5GB 25GB ($120) 50GB ($240)
Dropbox 2GB 100GB ($100) 200GB ($200)
Google Drive 5GB 25GB ($30) 100GB ($60)
Microsoft
SkyDrive
7GB 27GB ($10) 57GB ($25)
Mega 50GB 400GB ($120) 2TB ($240)

62. Core Advantages
 Cost saving: You pay for what you use
 Easy on installation and maintenance
 Increased storage
 Highly automated
 Flexibility
 Better mobility
 Shared resources
 Back up and restoration

63. • Can be less expensive compared to buying
software and hardware
• Can be used from any computer or device
with an Internet connection
• The device does not need as large of an
internal storage system
• Compatible with most computers and
operating systems
• Updates occur across the service
advantages

64.  Data security and privacy
 Network connectivity and bandwidth
 Service unavailability due to power outage
 Dependence on outside agencies
 Limited flexibility
 Cost
 Knowledge and integration
 Long term stability of service provider
Disadvantages

66. Thank You