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ContentsIntroduction (What and Why)Key characteristicsComponents (What is Virtualization?)Supported Application FrameworkArchitectureCloud APIs and Cloud TypesEconomicsPrivacyGoogle App engine and Amazon EC2Latest TrendsApplicationsReferences

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Introduction

It is combination of three Computing concepts :1.Grid Computing2.Utility Computing3.Autonomic Computing

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Contd..Many cloud computing deployments ,depend on grids have autonomic characteristicsbill like utilities

— but cloud computing tends to expand what is provided by grids and utilities.

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What is cloud?The cloud is a computing service that

charges you based only on the amount of computing resources we use.

Pay as you go

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Why?Due to disadvantages of :-Licensed Software Software as a service

And due to advantage of :-Cloud Computing

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Key Characteristics Agility Cost Device and

location independence

Multi tenancy

Reliability Scalability Security Sustainability

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Basic Components of Cloud Computing

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Supported Application Frameworks Platform Framework

Google App Engine Java Google Web Toolkit,Python

Heroku Ruby on Rails

Azure Services Platform

.Net

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Cloud Computing ArchitectureSoftware as a ServicePlatform as a ServiceInfrastructure as a ServiceThese 3 services encapsulate the basic 6 Cloud

Computing Components

Next few slides will elaborate these 3 services..

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Software as a ServiceSoftware as a service features a complete

application offered as a service on demand.

A single instance of the software runs on the cloud and services multiple end users or client organizations.

Eg: salesforce.com , Google Apps

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Platform as a ServicePlatform as a service encapsulates a layer of

software and provides it as a service that can be used to build higher-level services.

2 Perspectives for PaaS :-

1. Producer:- Someone producing PaaS might produce a platform by integrating an OS, middleware, application software, and even a development environment that is then provided to a customer as a service.

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PaaS Contd..

2. Consumer:-Someone using PaaS would see an encapsulated service that is presented to them through an API.

The customer interacts with the platform through the API, and the platform does what is necessary to manage and scale itself to provide a given level of service.

Virtual appliances can be classified as instances of PaaS.

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Infrastructure as a ServiceInfrastructure as a service delivers basic

storage and computing capabilities as standardized services over the network.

Servers, storage systems, switches, routers , and other systems are pooled and made available to handle workloads that range from application components to high-performance computing applications.

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Cloud APIs One of the key characteristics that distinguishes

cloud computing from standard enterprise computing is that the infrastructure itself is programmable.

Instead of physically deploying servers, storage, and network resources to support applications, developers specify how the same virtual components are configured and interconnected.

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Cloud APIs contd…

Including how virtual machine images and application data are stored and retrieved from a storage cloud.

They specify how and when components are

deployed through an API that is specified by the cloud provider.

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Cloud Computing Types

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Public Clouds

Public clouds are run by third parties, and applications from different customers are likely to be mixed together on the cloud’s servers, storage systems, and networks.

Public clouds are most often hosted away from customer premises, and they provide a way to reduce customer risk and cost by providing a flexible, even temporary extension to enterprise infrastructure.

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Private CloudsPrivate clouds are built for the exclusive use of

one client, providing the utmost control over data, security, and quality of service .

The company owns the infrastructure and has control over how applications are deployed on it.

Private clouds may be deployed in an enterprise datacenter.

Private clouds can be built and managed by a company’s own IT organization or by a cloud provider.

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Hybrid clouds

Hybrid clouds combine both public and private cloud models .

They can help to provide on-demand, externally provisioned scale.

The ability to augment a private cloud with the resources of a public cloud can be used to maintain service levels in the face of rapid workload fluctuations.

A hybrid cloud also can be used to handle planned workload spikes.

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EconomicsAvoid capital expenditure Billed on utility/subscription Can terminate contract any time Lower cost of entry Example (car, rent car, taxi)

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In a turbulent economy, cloud computing is even more attractive

( Why pay for more computing capacity than you need?!!!!)

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Privacy Encrypt data at rest Encrypt data in transit Strong authentication Cryptography and more secure algorithms Manage access right holder

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Google App EngineWhat is it? It can run your web applications on

Google’s infrastructure and easy to scale for traffic and data storage

Features (dynamic web serving, persistent storage, automatic scaling)

Sandbox –Isolates your application in its own secure,reliable environment that is independent of hardware,operating system and physical location of web server

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Application environment• Java• Python

Data store (powerful distributed data store with query engine and transactions,can scale as required, is consistent and uses optimistic concurrency control, grouping of data is done)

App engine services (URL Fetch, Mail, MemCache, Image Manipulation)

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Amazon ec2

What is it? Amazon Elastic Compute Cloud (Amazon

EC2) is a web service that provides resizable compute capacity in the cloud.

Service Highlights -Elastic -Reliable -Completely -Secure -Controlled -Inexpensive -Flexible

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Contd..

Features (Amazon Elastic Block Store,Multiple locations,elastic IP,Amazon Cloudwatch,Auto Scaling,Elastic Load balancing)

EC2 works in conjunction with Amazon Simple Storage Service (Amazon S3), Amazon SimpleDB and Amazon Simple Queue Service (Amazon SQS) to provide a complete solution for computing, query processing and storage across a wide range of applications.

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Uses Peer-to-peer / volunteer computing

(Bittorrent, BOINC Projects, Skype) Web application (Facebook) Software as a service (Google Apps, SAP and

Salesforce) Software plus services (Microsoft Online

Services)

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Latest TrendsIntegrating more scripting languagesData center volumesOpen source cloud computing (Red Hat)Salesforce for Google appsGoing green

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Referenceswww.wikipedia.orgYou tube cloud computing videosWhat is Google App Engine? – GoogleIntroduction to Cloud Computing

architecture White Paper 1st Edition, June 2009

Amazon Elastic Compute Cloud – AmazonCloud Computing Potentials -Raphael Volz

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