AMOS KUJENGA ADLSN Training Coordinator akujenga@gmail.com Addis Ababa, Ethiopia 5 – 7 November...

AMOS KUJENGAADLSN Training Coordinatorakujenga@gmail.comAddis 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