Post on 03-Jan-2016
INTRODUCTION TO CLOUD COMPUTING
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UNDERSTANDINGCLOUD
COMPUTING
DEFINITION
CLOUD COMPUTING
understanding cloud computing
Traditional software with licenses
Software as a services
CLOUD COMPUTING
Pay as you Go
Per Monthly
understanding cloud computing
understanding cloud computing
SAAS
PAAS
VIRTUALIZATION
IAAS
UTILITY COMPUTING
DEFINITIONS:
"Clouds are a large pool of easily usable and accessible virtualized
resources (such as hardware, development platforms and/or services).
These resources can be dynamically reconfigured to adjust to a variable
load (scale), allowing also for an optimum resource utilization. This pool
of resources is typically exploited by a pay-per-use model in which
guarantees are offered by the Infrastructure Provider by means of
customized SLA“
- Vaquero, L., L. Rodero-Merino, et al. (2008)
Cloud computing is simply a
buzzword used to repackage grid
computing and utility computing,
both of which have existed for
decades.”
Evolution from Grid to Cloud ComputingEvolution from Grid to Cloud Computing
• Public Cloud: The services are delivered to the client via the Internet from a third party service provider.Example: Amazon
• Private Cloud: These services are managed and provided within the organization. There are less restriction on network bandwidth, fewer security exposures and other legal requirements compared to the public Cloud.Example: HP Data Centers
It is a combination of services provided by the Private and public cloud
Example: –ERP in private cloud –Sales & Email in public
IAAS (Infrastructure as a service)
• Offers capacity for rent, basically hosted data
centers and Servers
• An evolution of web site and server hosting
services provided by VPS
Examples:
– Verizon's CAAS (Computing as a service)
– AT&T (Hosting & Storage)
IAAS IAAS
PAAS (Platform as a service)
• Platforms enable application developers
to host their services
Example:
– Google’s App Engine
– Amazon E2C
– Microsoft azure
PAAS PAAS
• SAAS – Software as a service
• The application itself is provided
by service provider
Examples:
– ENTERPRISE: SalesForce.com, WebEx,
Officelive
– USER MAIL: gmail, Hotmail, Yahoo
– USER PICS: flickr, picasa
SAAS SAAS
• Amazon
• Microsoft windows Azure
• Savvis
• Google App Engine
• Vmware cloud
• Rack space
• Go grid
• Reduced Hardware equipment for end users
• Improved Performance
• Lower Hardware and Software Maintenance
• Instant Software Updates
• Accessibility
• Pay for what we use
•
• Security Issues
• Internet connection
• Features may be limited
• Location of Servers
• Speed