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Cloud Computing An Introduction Dr. Basem Suleiman Web Application Engineering School of Computer Science and Engineering UNSW Cloud Computing, Dr. Basem Suleiman 1 The Internet - Web Applications https://support.office.com/en-us/

  1. Cloud Computing – An Introduction Dr. Basem Suleiman Web Application Engineering School of Computer Science and Engineering UNSW Cloud Computing, Dr. Basem Suleiman 1

  2. The Internet - Web Applications https://support.office.com/en-us/ Cloud Computing, Dr. Basem Suleiman 2

  3. The Internet – Web Applications • Web Applications drive the Internet – Email Applications – Social Media/Network – E-commerce Applications – Web and data Services – Business processes • What makes such applications functional? – Hardware (Servers, Networks, Storage), Application and System Software, Databases system and software, etc. Sources: https://www.tipsandtricks-hq.com/ecommerce/tag/buy-button-image http://tlists.com/how-to-write-effective-and-engaging-facebook-posts/ Cloud Computing, Dr. Basem Suleiman 3

  4. Web Hosting – Traditional Models Sources: http://nuve.com.au/cloud-hosting-vs-shared-hosting/#prettyPhoto http://www.webhostingspree.com/cloud/resources/what-is-cloud-hosting/ Cloud Computing, Dr. Basem Suleiman 4

  5. Data Centers / Server Farms • Collection of servers and computing devices that are networked together and co-located into a single facility • Servers can be configured and set up with appropriate systems and application software • Major online companies have their own data centres, Google, eBay, Amazon • An enterprise cloud have private date center http://www.taxrates.com/blog/2014/09/24/amazon-may-build-data-center-ohio/ http://www.zdnet.com/i/story/60/98/011892/ebay-topaz-room1.jpg Cloud Computing, Dr. Basem Suleiman 5

  6. Cloud Computing – Enabling Technologies Cloud computing is the result of the evolution and adoption of existing technologies and paradigms • Virtualization • A software that separates a physical computing device into one or more virtual devices, each of which can be easily used and managed to perform computing tasks • Autonomic computing • Automation of the process through which a user can provision resources on- demand • Minimal user involvement, the automated process reduces costs and potential human errors • Service-Oriented Computing • All resources in cloud computing model are provided as services • Use of the well-established standards and best practices gained in the domain of SOA to allow global and easy access to cloud services in a standardized way Cloud Computing, Dr. Basem Suleiman 6

  7. So, What’s Cloud Computing? “ Cloud computing is a model for enabling convenient, on- demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction .” (National Institute of Standards and Technology (NIST), USA). • Note: there are many definitions and classification of cloud computing, it’s characteristics and models • NIST definition and models are widely adopted in research and industry Cloud Computing, Dr. Basem Suleiman 7

  8. Cloud Computing – Essential Characteristics On-demand self-service • Computing capabilities, such as server and network storage, are provisioned as needed automatically without requiring human interaction with each service provider Broad network access • Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms Resource poolin g • The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand NIST definition of cloud computing http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-145.pdf Cloud Computing, Dr. Basem Suleiman 8

  9. Cloud Computing – Essential Characteristics Rapid elasticity • Capabilities can be elastically provisioned and released, in some cases automatically, to scale rapidly outward and inward commensurate with demand • To the consumer, the capabilities available for provisioning often appear to be unlimited and can be appropriated in any quantity at any time. Measured service Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts) NIST definition of cloud computing http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-145.pdf Cloud Computing, Dr. Basem Suleiman 9

  10. Cloud Computing – Service Models Cloud Consumers / Clients Software as a Service (SaaS) Platform as a Service (PaaS) Infrastructure as a Service (IaaS) Source: https://commons.wikimedia.org/w/index.php?curid=18327835 Cloud Computing, Dr. Basem Suleiman 10

  11. Infrastructure as a Service (IaaS) • Obtain basic computing resources such as processing, storage, • networking, and associated software as services • Enabled by virtualisation - running fully-functional independent virtual instances on top of the actual physical infrastructure • Processing - Virtual machines - VMWare, Xen, etc. • Storage - Virtual Hard Disk over Distributed File Systems - NFS, GFS, Storage Pools, etc. • Examples : Amazon, Rackspace, GoGrid (public and private cloud resources) Cloud Computing, Dr. Basem Suleiman 11

  12. Public Cloud Provider Example (IaaS) Amazon Web Services • Amazon Elastic Compute Cloud (EC2) - Computing (VMs) • Amazon Elastic Block Store (EBS) - Persistent block-level storage for EC2 VMs • Amazon RDS - Cloud-based RDBMS service • Amazon Simple Storage Service (S3) - Storage Volumes • Amazon CloudFront - Content delivery network that uses S3 to store objects in edge locations. • Amazon Elastic LoadBalancer, CloudWatch • Amazon DynamoDB - NoSQL database • And many more … Cloud Computing, Dr. Basem Suleiman 12

  13. Platform as a Service (PaaS) • Allow users to develop and deploy applications on to a vendor's platform using specific API/libraries that abstract the actual process • Develop application in cloud-based environment • Hardware details are hidden from the user - vendor takes care of the infrastructure (could be IaaS) • User has control over the hosting configurations and how much application-level resources (objects, sessions, database tables) to consume • Pricing is also dependent on the application size • Examples: Google App Engine, Microsoft Azure Services, Heroku, etc. Cloud Computing, Dr. Basem Suleiman 13

  14. Platform as a Service (PaaS) • Allow users to develop and deploy applications on to a vendor's platform using specific API/libraries that abstract the actual process • Develop application in cloud-based environment • Hardware details are hidden from the user - vendor takes care of the infrastructure (could be IaaS) • User has control over the hosting configurations and how much application-level resources (objects, sessions, database tables) to consume • Pricing is also dependent on the application size • Examples: Google App Engine, Microsoft Azure Services, Heroku, etc. Cloud Computing, Dr. Basem Suleiman 14

  15. Software as a Service (SaaS) • Full-featured applications are delivered to the customer over the Internet • No need to install the application locally • Subscription model instead of upfront license and install model • Some developer use APIs for integrating SaaS apps into internal apps • Examples: Salesforce.com (CRM), Zoho (Collaboration), Cloud Computing, Dr. Basem Suleiman 15

  16. Cloud Computing – Deployment Models Private Cloud : The cloud infrastructure is owned by a service provider who makes it available to the general public for commercial purposes. Public Cloud : The cloud infrastructure is owned by an organization which operates it only for its internal use. Hybrid Cloud : Combination of private , https://commons.wikimedia.org/w/index.php?curid=6089457 and public clouds. E.g. resources sourced from public clouds whenever demand exceeds the capacity of a private cloud (cloud bursting) NIST definition of cloud computing http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-145.pdf Cloud Computing, Dr. Basem Suleiman 16

  17. Cloud Computing – Business Models On understanding the economics and Elasticity Challenges of deploying business applications on public cloud infrastructure https://ssrg.nicta.com.au/publications/nictaabstracts/5536.pdf Cloud Computing, Dr. Basem Suleiman 17

  18. Cloud Computing – Business Models Pricing Models of AWS cloud services Cloud Computing, Dr. Basem Suleiman 18

  19. Cloud Computing - Case Study Data-Intensive Application • In 2007, The New York Times decided to make all public domain articles from 1851 - 1922 available free of charge • 11 million articles from 1885 - 1980 - each of which is composed of TIFF images that have to be combined – hugely compute and data-intensive • Solution - Use Amazon S3 to store the article data (4 TB) and EC2 machines to generate the PDFs which were saved back to S3 from where they are served • Use Hadoop (open-source Map-Reduce implementation) for programming http://open.blogs.nytimes.com/2007/11/01/self-service-prorated-super-computing-fun/?_r=0 Cloud Computing, Dr. Basem Suleiman 19

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