AMOS KUJENGA ADLSN Training Coordinator Addis Ababa, Ethiopia 5 – 7 November 2014 Cloud Computing

Outline of Presentation Definition Types of Cloud Services Examples Facts Pros and Cons

1. 1 Cloud Computing Defined “Cloud” is a metaphor for the Internet. “Cloud Computing” is a modern phrase commonly used today to refer to the act of storing, accessing, sharing data, applications, and computing power over the Internet, in other words in cyberspace. (ANDERSON & RAINIE, 201)

1.1 Cloud Computing Defined “Cloud Computing” is when computing is delivered as a service rather than a product ◦ Computing services are made available to computers and other devices over a network such as the Internet ◦ On-demand access can be rapidly given with minimal service provider interaction

1.2 Types Of Cloud Services Software as a Service (SaaS) Platform as a Service (PaaS) Infrastructure as a Service (IaaS)

1.21 Software as a Service (SaaS) A software distribution model in which off-the shelf applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet. Is the simplest form of cloud computing Innovative Sierra, WorldCat

1.22 Platform as a Service (SaaS) Cloud based platform, services, and tools for creating and hosting SaaS applications Allows users to create their own applications using supplier-specific tools and languages Risk of vendor lock-in Google App Engine, Windows Azure

1.23 Infrastructure as a Service (SaaS) AKA Hardware as a Service (HaaS) Virtual computer and infrastructure services in the cloud for hosting traditional software applications Allows users to run any applications they please on cloud hardware of their own choice Amazon Elastic Compute Cloud (EC2), Amazon Simple Storage Service (Amazon S3)

1. 3 Cloud Computing Examples CategoryExample Office ApplicationsGoogle Docs, MS Office 365 Mailing ServicesGmail, Yahoo, Zimbra Storing ServicesDropBox Software and ApplicationsHosted repositories Video and Presentation ServicesYouTube, SlideShare, Prezi File Sharing ServicesDropBox Calendar ServicesGoogle Calendar Social NetworkingFacebook, Google+

1. 3 Cloud Computing Examples Hosted Versus Non-Hosted DLs

1. 3 Cloud Computing Examples Hosted Repositories

1. 3 Cloud Computing Examples Hosted Repositories

1.4 Cloud Computing Facts Mobile technology is driving people to cloud-based services, killing the PC market The exponential increase in access to the Internet is also a major player Social networking sites are the most popular cloud-based services Less staff focus on IT issues, more focus on service delivery

1.4 Cloud Computing Facts Support by service providers as opposed to IT staff

1.5 Cloud Computing Pros No upfront investment in hardware and/or software Anywhere, anytime access to data and services Increased reliability (subject to debate) Ease of data sharing Provide backup to locally stored data Ease of collaborative working Services can be provisioned in minutes Scalable (add capacity as needed, no old assets)

1.6 Cloud Computing Cons Security concerns Privacy concerns Greater depence on external forces ◦ Loss of local control ◦ Vendor lock-in Requires constant high-speed Internet access “Forces” use of high-end devices