Thursday, May 28, 2015 - 11:00
When most people think of the cloud it’s the public cloud that comes to mind, that is, a virtualised environment using pooled shared physical resources, and accessible over a public network such as the internet.
Public clouds are used extensively for private individuals, small businesses or start-ups that don’t require the level of infrastructure and security offered by private clouds. But that said, enterprise sized businesses can still utilise public clouds to make their operations more efficient, by for example, storing online non-sensitive content, online document collaboration and webmail.
A public cloud model typically offers the following benefits:
Scalability because cloud resources are available on demand from the public clouds’ pools of resource so that the applications that run on them can respond changing demand.
Cost efficiency because public clouds bring together greater levels of resource and as a result deliver economies of scale. Centralised operation and management of the underlying resources is shared across all of the cloud services.
Better pricing similar to utility bills in that you only pay for what you use. Public cloud services often employ a pay-as-you-go charging model whereby so users can access the resource they need, when they need it, and only pay for what they use.
Reliability is gained thanks to the vast number of servers and networks involved in creating a public cloud. Some public cloud services draw resource from many data centres so if one data centre went offline and individual cloud services wouldn’t suffer. And furthermore, if one physical component fails the cloud service would still run unaffected on the remaining components.
Anytime anywhere computing as all that is required to access a public cloud is an internet connection. This means organisations can establish remote access to IT infrastructure and online document collaboration from multiple locations.
Flexibility thanks to Software as a Service, Infrastructure as a Service and Platform as a Service offered from a public cloud as well as cloud based web hosting and development environments.
All of these services can also be provided from private and hybrid clouds too.