SAAS:Application is used as an on demand service. Often provided via the InternetThink on-demand TV programsExample: Google App (online office)Benefits to usersReduce expenses: multiple computers, multiple usersEase of usage: easy installation, access everywhereBenefits to providersEasier to maintainControl usage (no illegal copies)
Presentation on cloud computing
Bijit Ghosh Heritage Institute Of Technology.Dept. of Computer Science & Engineering
CloudDemand resources or services over Internet scale and reliability ofdata center.
Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a serve over the Internet. Users need not have knowledge of, expertise in, or control over the technology infrastructure in the "cloud" that supports them.
Grid Computing: A form of distributed computing. Cluster of looselycoupled, networked computers acting in concert to perform very large tasks. Utility Computing: Packaging of computing resources such as computing power, storage, also a metered services.
Share Computers and data Evolved to harness inexpensive computers in Data center to solve variety of problems Harness power of loosely coupled computers to solve a technical or mathematical problem Used in commercial applications for drug discovery, economic forecasting, seismic analysis and back-office Small to big • Can be confined to a corporation • Large public collaboration across many companies and networks Most grid solutions are built on • Computer Agents • Resource Manager • Scheduler Compute grids • Batch up jobs • Submit the job to the scheduler, specifying requirements and SLA(specs) required for running the job • Scheduler matches specs with available resources and schedules the job to be run • Farms could be as large as 10K cpus Most financial firms has grids like this Grids lack automation, agility, simplicity and SLA guarantees
Computing resources (CPU hour, memory, network) and platform to run software are provided as on demand service • Think electricity service The same evolution happened • Hardware as a service (HaaS), Infrastructure as a service (IaaS), Platform as a Service (PaaS) Examples of UC providers: Amazon EC2, Google AppEngine … Who will use UC? Is UC the end of high-end PC? • People who otherwise has to build their own data center: SaaS providers, analytics & batch processing
Evolved over a period of time Roots traced back to Application Service Providers in the 1990’s Parallels to SaaS Evolved from Utility computing and is a broader concept
Write a file -> Save -> Computer downFile is lostFiles are always stored in cloud, never lost.
Empowerment Agility API Cost Device and location dependence Virtualization Multi-Tenancy On demand
Services on demand Resources on demand Physical assets as services
Cloud Computing in three levels Application in the cloud • This is what almost everyone has already used in the form of Gmail , Yahoo mail, wordpress.com, etc. Platform in the cloud • Developers write their application to a more or less open specification and then upload their code into the cloud where the app is run magically somewhere.
Infrastructure in the cloud • Developers and system administrators obtain general compute, storage, queuing, and other resources and run their applications with the fewest limitations. • This is the post powerful type of cloud in that virtually any application and any configuration.
Application Services(services on demand) • Gmail, GoogleCalender • Payroll, HR, CRM etc. • Sugarm CRM, IBM Lotus Live Platform Services (resources on demand) • Middleware, Intergation, Messaging, Information, connectivity etc • AWS, IBM Virtual images, Boomi, CastIron, Google Appengine Infrastructure as services(physical assets as services) • IBM Blue house, VMware, Amazon EC2, • Microsoft Azure Platform, Sun Para scale and more
Client: A cloud client consists of computer hardware and/or software that relies on cloud computing for application delivery. Ex., PC, NB, mobile phones. Application: Cloud application service or "Software as a Service (SaaS)" delivers software as a service over the Internet, eliminating the need to install and run the application on the customers own computers and simplifying maintenance and support. Platform: Platform as a Service (Papas) delivers a computing platform and/or solution stack as a service, often consuming cloud infrastructure and sustaining cloud applications.
Infrastructure:Infrastructure as a Service (IaaS)delivers computer infrastructure, typically a platformvirtualization environment as a service. Server: The servers layer consists of computer hardware and/or computer software products that are specifically designed for the delivery of cloud services, including multi-core processors, cloud-specific operating systems and combined offerings.
The illusion of infinite computing resources The elimination of an up-front commitment by users The ability to use and pay on demand
Software as a service Platform as a service Infrastructure as a service
What is “as a service”? Low barriers to entry • making them available to small businesses. Large scalability Multi tenancy • allows resources to be shared by many users. Device independence • which allows users to access the systems on different hardware
Cloud Computing Services Infrastructure as a Service(IaaS) • Amazon EC2 • Go Grid Platform as a Service(PaaS) • Right Scale Software as a Service(SaaS) • Salesforce.com • Sales force for Google Apps
IaaS is sometimes also called Hardware as a Service (HaaS). Just offers the hardware for customers to rent • Server space • Network equipment • Memory • CPU cycles • Storage space
IaaS involves several pieces: • Service level agreements • Computer hardware • Network • Internet connectivity • Platform virtualization environment • Utility computing billing
PaaS • Supplies all the resources required to build applications and services completely from the Internet • Without having to download or install software
Software as a Service • An application is hosted as a service • The customer does not have to maintain it or support off-site software
Some of SaaS applications include • Customer resource management (CRM) • Video conferencing • IT service management • Accounting • Web analytics • Web content management Benefits of SaaS • Familiarity with the World Wide Web . • Smaller staff IT • Better marketing • Web reliability • Security
Open for use by general public • Exist beyond firewall, fully hosted and managed by the vendor • Individuals, corporations and others • Amazons Web Services and Google appEngine are examples Offers startups and SMB’s quick setup, scalability, flexibility and automated management. Pay as you go model helps startups to start small and go big
Within the boundaries(firewall) of the organization All advantages of public cloud with one major difference • Reduce operation costs • Has to be managed by the enterprise Fine grained control over resources More secure as they are internal to organization Schedule and reshuffle resources based on business demands Ideal for apps related to tight security and regulatory concerns Development requires hardware investments and in-house expertise Cost could be prohibitive and cost might exceed public clouds
A Hybrid cloud is a composition of at least one Private Cloud andat least one Public Cloud. A hybrid cloud is typically offered in oneof two ways: A vendor has a private cloud and forms a partnership with a public cloud provider. A public cloud provider forms a partnership with a vendor that provides private cloud platforms.
Attacks targeting share-tenancy Environment VM-based Malware Launch Pad for brute force and other attacks Data availability (Business Continuity)
Claims Based Authentication A trusted authority issues a signed security token containing a set of claims which is given to the application for validation. The application will authenticate the user if the security token is valid and signed by a trusted issuer.
Bare Operating System Web or Portal Infrastructure Application Web Services Database Services Customizable Application Services
Bare Operating System- RackspaceCloud.com Formerly Mosso, a division of Rackspace Provides various Linux distributions Also supports “Sites” • Web server, both Linux and Windows • O/S managed by hosting Service
Web or Portal Infrastructure- Microsoft SharePoint online Rich Portal capabilities • Excel Services • Forms Services • Visio Services • Access Services • Business Data Services • Search Services
Applications- Google Apps. Prebuilt, fully functional applications • Mail • Calendar • Word Processing • Dynamic Web pages
Web Services- Amazon Amazon EC2 and S3 • EC2-Elastic Compute Cloud • S3-Simple Storage Services Resizable Compute Capability • Auto Scaling- Allocate Resources Based on Definable Conditions Development Environments • IBM sMASH • Jboss Enterprise Application Platform • Ruby on Rails
Database - Zoho’s CloudSQL Cloud based relational database
Google Android Google APIs add-on • extends your Android SDK to give your applications access to Google libraries such as Maps. Android Cloud to Device Messaging • a service that allows you to send lightweight messages from your application server to an Android application on a device.
Adobe AIR • a cross-operating system runtime • lets developers combine HTML, Ajax, Adobe Flash®, and Adobe Flex® technologies to deploy rich Internet applications (RIAs) on the desktop Apple iPhone SDK • includes a complete set of development tools for creating applications for iPad, iPhone, and iPod touch. Microsoft Online
Companies began switching from hardware to cloud services because they were attracted to benefits like a reduction in capital costs as well as an easing in IT staffing issues. According to projections by Century Link, by 2015, the world will see a four-fold increase in the amount of data being created and replicated. And once all of that data comes into being, you need a way to store it all securely and allow end- users to access it efficiently.
Lauren C. State 1 of d cloud blogger: • Cloud computing will allow everybody to be a service provider. • Employees will be able to use any device to access, transact and manage their work. • There will be a security breach in 2012 that will force organizations to rethink how they secure their data and applications. • A new class of real time, personalized service providers will emerge. • In Africa, the convergence of social, mobile and cloud will emerge as critical tools for governments to deliver services and drive economic growth.
The use of the cloud provides a number of opportunities: It enables services to be used without any understanding of their infrastructure. Cloud computing works using economies of scale: • It potentially lowers the outlay expense for start up companies, as they would no longer need to buy their own software or servers. • Cost would be by on-demand pricing. • Vendors and Service providers claim costs by establishing an ongoing revenue stream. Data and services are stored remotely but accessible from “anywhere”.
In parallel there has been backlash against cloud computing: Use of cloud computing means dependence on others and that could possibly limit flexibility and innovation: The others are likely become the bigger Internet companies like Google and IBM, who may monopolise the market. Some argue that this use of supercomputers is a return to the time of mainframe computing that the PC was a reaction against. There have been cases of users being locked out of accounts and losing access to data.
Security could prove to be a big issue: • It is still unclear how safe out-sourced data is and when using these services ownership of data is not always clear. There are also issues relating to policy and access: • If your data is stored abroad whose FOI policy do you adhere to? • What happens if the remote server goes down? • How will you then access files?