پاورپوینت ارائه جالب OpenStack (انگلیسی)

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BY- NAMITA,PALAK,SABI
Why switch to Cloud Computing?
An Insight into Cloud Computing
What is Cloud ?
The word cloud is used as a metaphor for "the Internet"
 The expression cloud is commonly used in science to describe a large agglomeration of objects that visually appear from a distance as a cloud and describes any set of things
In analogy to above usage the word cloud was used as a metaphor for the Internet and a standardized cloud-like shape was used to denote a network on telephony schematics and later to depict the Internet in computer network diagrams.
The NIST Models
The nist service models

Software as a Service(SaaS)
Defined as service-on-demand, where a provider will license software tailored.
In the SaaS model, cloud providers install and operate application software in the cloud and cloud users access the software from cloud clients. Cloud users do not manage the cloud infrastructure and platform where the application runs. This eliminates the need to install and run the application on the cloud user's own computers, which simplifies maintenance and support.
Examples of SaaS include: Google Apps, Microsoft Office 365.
Platform As A Service(PaaS)
In the PaaS model, cloud providers deliver a computing platform typically including operating system, programming language execution environment, database, and web server. Application developers can develop and run their software solutions on a cloud platform without the cost and complexity of buying and managing the underlying hardware and software layers.
Examples of PaaS include: AWS Elastic Beanstalk, Force.com, Google App Engine, Windows Azure Cloud Services.

Infrastructure As A Service(IaaS)
In the most basic cloud-service model, providers of IaaS offer computers physical or (more often) virtual machines and other resources. IaaS clouds often offer additional resources such as a virtual-machine disk image library, raw (block) and file-based storage, firewalls, load balancers, IP addresses, virtual local area networks (VLANs), and software bundles. IaaS-cloud providers supply these resources on-demand from their large pools installed in data centers.
Examples of IaaS providers include: Amazon EC2, Azure Services Platform, Google Compute Engine, HP Cloud, Oracle Infrastructure as a Service, Rackspace Cloud
The NIST Deployment Models
Types of Cloud
Public Cloud-It allows systems & services to be easily accessible to general public
Private Cloud- It allows systems & services to be easily accessible within an organization
Community Cloud- It allows systems & services to be easily accessible to group of organizations serving the same purpose
Hybrid Cloud-It’s a mixture of public and private cloud.

Open Stack

OpenStack is a collection of open source technologies delivering a massively scalable cloud operating system (IaaS).
History
NASA wanted to host its own high-res images without help from Google, Microsoft or Amazon.
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