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Cloud Computing

Lec . 5 April 22, 2010 ISM 158. Cloud Computing. Instructor: Pankaj Mehra Teaching Assistant: Raghav Gautam. What is cloud computing?. A computing paradigm that allows one or more of systems infrastructure, application platform, or applications

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Cloud Computing

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  1. Lec. 5 April 22, 2010 ISM 158 Cloud Computing Instructor: Pankaj Mehra Teaching Assistant: Raghav Gautam

  2. What is cloud computing? • A computing paradigm that allows one or more of • systems infrastructure, • application platform, or • applications to be delivered as services over the Internet

  3. Cloud Computing is Different • Applications are delivered aaS and do not need to be installed or licensed • Like leasing a car • Painless upgrades • Computing platform is remote • Runtime services • Application’s data • Resources are remote, virtual and flexible in scale

  4. Cloud Computing is easier • Easy adoption • Less capital intensive for the consumers • Pay as you go • Eliminates the slavery that comes from technology ownership • Simple economics • Statistical multiplexing of pooled resources • Economy of scale and greater utilization of capacity

  5. Example: Using Amazon EC2 • Select a pre-configured, templated VM image to start.Or create an Amazon Machine Image (AMI) containing the applications, libraries, data, and associated configuration settings. • Configure security and network access on Amazon EC2 instance. • Choose the instance types and OS you want, then start, terminate, and monitor as many instances of your AMI as needed, using AWS APIs or associated management tools. • Choose to run in many locations, utilize static IP, or attach persistent block storage to your instances. • Pay only for the resources that you actually consume, like instance-hours or data transfer.

  6. Cloud Computing Concepts • Virtualization A trick invented by operating systems scientists that creates an illusion of unlimited, dedicated resources • Multi-tenancy A software architecture principle by which a single instance of a service may support multiple client organizations

  7. The Vanishing Computer • Increasingly, cloud computing is taking the physical and application resources that providers had in-house and putting that off promises • At the same time, it is creating an illusion that the resource can be scaled out without limits

  8. Cloud adoption areas • We find all four variants used by businesses in practice • Discussion: why would IT choose one option over another?

  9. Key value propositions • Scalability Scalability is the ability to achieve greater performance by adding resources What are the business model implications? • On-demand The ability to deliver and configure applications and supporting infrastructure with increasingly shorter turnaround times

  10. Cloud computing is disruptive • Changes the dialog between business and IT • Threatens and challenges established model • Not the lowest cost option • Changes the economics of starting a new business imperative • Provides new ways to reach customers, quickly

  11. Where to learn more • IEEE Internet Computing Magazine special issue on Cloud Computing, September/October 2009. • Living Document at Cloud Computing Use Cases whitepaper by Tidwell, et al (recent update in Feb. 2010) available at http://www.scribd.com/doc/18172802/Cloud-Computing-Use-Cases-Whitepaper

  12. In the next lecture … • Controlling the delivery of cloud services in a business: how?

  13. Questions?

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