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AMOS KUJENGAADLSN Training [email protected] Ababa, Ethiopia5 – 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-inGoogle 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 ExamplesCategory Example
Office Applications Google Docs, MS Office 365
Mailing Services Gmail, Yahoo, Zimbra
Storing Services DropBox
Software and Applications Hosted repositories
Video and Presentation Services
YouTube, SlideShare, Prezi
File Sharing Services DropBox
Calendar Services Google Calendar
Social Networking Facebook, Google+
1. 3 Cloud Computing ExamplesHosted Versus Non-Hosted DLs
1. 3 Cloud Computing ExamplesHosted Repositories
1. 3 Cloud Computing ExamplesHosted Repositories
1.4 Cloud Computing FactsMobile 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 FactsSupport by service providers as
opposed to IT staff
1.5 Cloud Computing ProsNo upfront investment in hardware and/or
softwareAnywhere, anytime access to data and
servicesIncreased reliability (subject to debate)Ease of data sharingProvide backup to locally stored dataEase of collaborative workingServices can be provisioned in minutesScalable (add capacity as needed, no old
assets)
1.6 Cloud Computing ConsSecurity concernsPrivacy concernsGreater depence on external
forces◦Loss of local control◦Vendor lock-in
Requires constant high-speed Internet access
“Forces” use of high-end devices