The delivery of computing as a service rather than a product, whereby shared resources, software and information are provided to computers and other devices as a utility (like the electricity grid) over a network (typically the Internet). Intec have been delivering ‘Cloud based’ IT solutions for over 5 years, including provision of our own software applications hosted in our own data centre, and also resell the IBM email and business collaboration suite known as ‘Lotus Live’.
Describes cloud computing in the traditional mainstream sense, whereby resources are dynamically provisioned to the general public on a fine-grained, self-service basis over the Internet, via web applications/web services, from an off-site third-party provider who bills on a utility computing basis. Examples include Lotus Live, Google Apps & Microsoft Office 365.
Infrastructure operated solely for a single organization, whether managed internally or by a third-party and hosted internally or externally. The main advantage with a privately-managed cloud is direct control over every aspect of the cloud’s implementation: the hardware, the networking, the operating system and other software used to create the cloud itself, also the way security is implemented. However, often attracts criticism because users “still have to buy, build, and manage them” and thus do not benefit from lower up-front capital costs and less hands-on management, essentially “lacking the economic model that makes cloud computing such an intriguing concept”. Examples of this would be VMWare or Citrix with the virtual servers hosting given applications, maybe virtual desktops running on Thin Clients, or even applications being hosted on a central system and delivered to a user via a client.
A composition of two or more clouds (private, community, or public) that remain unique entities but are bound together, offering the benefits of multiple deployment models. For example, an organization might use a public cloud service, such as Amazon Simple Storage Service (Amazon S3) for archived data but continue to maintain in-house storage for operational customer data. Ideally, the hybrid 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.
Shares infrastructure between several organisations from a specific community with common concerns (security, compliance, jurisdiction, etc.), whether managed internally or by a third-party and hosted internally or externally. The costs are spread over fewer users than a public cloud (but more than a private cloud), so only some of the benefits of cloud computing are realised.For example, a consortium of schools might decide to create a community cloud. Payments for use of the cloud might be made via dues to the consortium or through some other equitable pricing mechanism.