Informatics
Table 1: Cloud 101 abbreviation list SaaS
On-demand software
Software as a Service – Software distribution model in which discreet applications are hosted by a vendor or service provider and made available to customers over the Internet
• Easier administration • Automatic updates and patch management • Compatibility and easier collaboration: All users will have the same version of software
• All operational costs. No capital investment. Pay as you go and subscription based
PaaS STaaS
Platform/STorage as a Service – External service which provides the hardware, operating system, software upgrades, security and everything else related to the day to day hosting of an (enterprise) application
• Unification of programming development efforts
• Enabling geographically distributed development teams
• Lower operational costs; cross-boundary, single vendor support
• Enterprise data integration and systems consolidation
IaaS HaaS
Infrastructure as a Service – Provision model to outsource equipment used to support operations, including storage, hardware, servers and networking components
DaaS Virtual desktop Hosted desktop
XaaS Anything as a service Everything as a service
Public Cloud
Desktop as a service – The outsourcing of a virtual desktop infrastructure to a third party service provider
Refers to an increasing number of services that are delivered over the Internet rather than provided locally or on-site
Standard cloud computing model available to the general public over the Internet
• Utility computing service and billing model • Automation of administrative tasks • Dynamic scaling • Desktop virtualisation • Policy-based services
Service provider manages the back-end responsibilities of data storage, backup, security and upgrades • All operational costs
XaaS is the essence of cloud computing
• Inexpensive. Hardware, application costs are covered by the provider
• Scalable to meet needs • No wasted resources; you pay for what you use
• Examples include Gmail, Hotmail, Yahoo,
SalesForce.Com
Private cloud Internal cloud Corporate cloud
Hybrid cloud
Marketing term for a proprietary computing architecture that provides hosted services behind a firewall
A hybrid cloud is a composition of at least one private cloud and at least one public cloud
• Full control over data • Internally hosted • Traditional approach
Allows a business to take advantage of the scalability and cost-effectiveness that a public cloud computing environment offers without exposing mission-critical applications and data to third-party vulnerabilities
Multi-tenancy architecture
An architecture in which a single instance of a software application serves multiple customers. Each customer is called a tenant. Tenants may be given the ability to customise some parts of the application, such as colour of the user interface (UI) or business rules, but they cannot customise the application’s code
• Cost effective – provider only has to make updates once
• Ability to take advantage of virtualisation and remote access
• High security – each tenant’s data is isolated and remains invisible to other tenants
discovery. “ICT democratises innovation and enables smaller companies, academia and students to get access to computing that were previously
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only accessible by large organisations,” said Rüdiger Dorn, Director Cloud Computing, Public Sector EMEA of Microsoft Corporation. “Pay by
Drug Discovery World Fall 2011
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