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CLOUD COMPUTING Ankur Desai, Manish Chiniwalar Electronics & Communication Department, Gogte Institute of Technology, Belgaum

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Definition <ul><li>“… moving computing and data away from the desktop and the portable PC and simply displaying the results of computing that takes place in a centralized location and is then transmitted via the internet on the user's screen” </li></ul><ul><li>- John Makroff </li></ul>

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Introduction <ul><li>Cloud is a metaphor for describing the Internet. </li></ul><ul><li>On-demand self-service Internet Infrastructure where you pay only for what you use, all managed by a browser, application or API. </li></ul><ul><li>The best example of cloud computing is Google Apps where any application is deployed on the server can be accessed using a browser through the Internet. </li></ul><ul><li>Where we install subscribe softwares </li></ul>

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Other technologies <ul><li>Grid computing: In a grid of multiple computers, each of them us the others available resources. </li></ul><ul><li>Utility computing: </li></ul>

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Architecture Cloud Computing FRONT END BACK END Server/Data center + Any software (OS, docs, email, games, etc) Client Computer + Interface software Internet

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Characteristics <ul><ul><li>Massive scale </li></ul></ul><ul><ul><li>Virtualization </li></ul></ul><ul><ul><li>Non-stop computing </li></ul></ul><ul><ul><li>Software purchase not required </li></ul></ul><ul><ul><li>Geographic distribution </li></ul></ul><ul><ul><li>Service oriented software </li></ul></ul><ul><ul><li>Autonomic computing </li></ul></ul><ul><ul><li>Advanced security technologies </li></ul></ul>

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Cloud Computing Categories <ul><li>IaaS - Infrastructure as a Service </li></ul><ul><li>PaaS - Platform as a Service </li></ul><ul><li>SaaS - Software as a Service </li></ul>

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Infrastructure as a Service (IaaS) <ul><li>Delivers basic storage and compute capabilities as standardized services over the network. </li></ul><ul><li>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. </li></ul>

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Infrastructure as a Service (IaaS)

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Platform as a Service (PaaS) <ul><li>It is a paradigm for delivering operating systems and associated services over the Internet without downloads or installation. </li></ul><ul><li>Also delivers platform for application development on cloud technologies. </li></ul>

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Platform as a Service (PaaS)

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Software as a Service (SaaS) <ul><li>Features a complete application offered as a service on demand. </li></ul><ul><li>A single instance of the software runs on the cloud and services multiple end users or client organizations. </li></ul><ul><li>Applications may include document editors, games, or any other custom built application </li></ul>

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Software as a Service (SaaS)

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Cloud Infrastructure

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Traditional Computing <ul><li>Purchase hardware </li></ul><ul><li>Purchase software </li></ul><ul><li>Find space in data center </li></ul><ul><li>Create migration plan </li></ul><ul><li>Setup development & test </li></ul><ul><li>Configure systems </li></ul><ul><li>Configure databases </li></ul><ul><li>Configure networks </li></ul>

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With Cloud Computing <ul><li>Get a login ID! </li></ul><ul><li>Lets look at an example… </li></ul>

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The eyeOS operating system

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The eyeOS operating system

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The eyeOS operating system

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The eyeOS operating system

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SINGLE TENANT Vs MULTI-TENANT ARCHITECTURE Single tenancy gives each customer a dedicated software stack – and each layer in each stack still requires configuration, monitoring, upgrades, security updates, patches, tuning and disaster recovery. <ul><ul><li>On a multi-tenant platform, all applications run in a single logical environment: faster, more secure, more available, automatically upgraded and maintained. Any improvement appears to all customers at once. </li></ul></ul>Server OS Database App Server Storage Network App 1 Server OS Database App Server Storage Network App 2 Server OS Database App Server Storage Network App 3 Other apps Shared infrastructure

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Advantages <ul><li>Agility </li></ul><ul><li>Cost </li></ul><ul><li>Device and location independence </li></ul><ul><li>Multi-tenancy </li></ul><ul><li>Centralization </li></ul><ul><li>Peak-load </li></ul><ul><li>Utilization and efficiency </li></ul><ul><li>Reliability </li></ul><ul><li>Scalability </li></ul><ul><li>Security </li></ul><ul><li>Sustainability </li></ul>

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DISADVANTAGES OF CLOUD COMPUTING <ul><li>Stored data might not be secure </li></ul><ul><li>Dependent on internet connection </li></ul><ul><li>It’s not platform agnostic </li></ul><ul><li>Can be slow </li></ul>

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