Cloud Hosting services provide a web-hosting platform in virtual servers that take their informatics resources from wide underlying networks formed by physical web servers. Their model is similar to that of traditional public services suppliers, such as power electricity, gas, etc. it is to say, it is available as a service more than a product. The big picture looks like the client can connect to the service as many times as he needs, depending on his web demand and pay just for what he needs.
It is about an altarnative to web hosting through individual servers (unique or shared), and it can be considered an extention to the shared-hosting concept, where the webs are lodger in several servers. The main difference is that through cloud hosting the servers’ network used is too wide and most of the time it is shared among different data centers placed in many different places.
The practical examples of this service can be included among the categories of IaaS, Infrastructure as a Service or as PaaS, Platform as a Service. In the IaaS model, the client receives just the virtual hardware on which he can install the software he wants to create on it his own web app, while In the PaaS model the client receives the software, for example, as a complete solution on which he can install directly and develop his web app.
If you have an enterprise with a complex informatics infrastructure and experimented IT professionals you can be more interested in the IaaS model, which is more user-adjustable. If your enterprise does not have a complex informatics infrastructure, you could find a better experience with the PaaS option.
Some examples about the use of Cloud Hosting
A specific case about the development of the cloud hosting concept for business clients is the Virtual Data Centre (VDC) service, which uses a virtualized web of servers in the cloud that can be used to harbor all the informatics resources of an enterprise, including its websites.
The most evident examples of this service are based in the use of public cloud models that host webs on virtual services, which underlying services came from the same resource bank that use other virtual servers available to the public. And also employ the same public networks to the data transmission, which at the same time are saved physically on the underlying shared servers that form the cloud resource.
These public clouds join several security mechanisms to guarantee the privacity of its data and can be enough for the majority of the web installation. Yet, on the cases where security and privacy are priority criteria, the enterprise can save the information in private clouds, it is to say, those in which the resources (servers, networks, etc) of each user are completely isolated from the rest.
Characteristics and advantage of this service:
Liability; instead of the information being saved in a single physical server, the web is placed in a virtual partition that takes its resources, for example in the disk space, of a wide underlying network of physical servers. If one of the servers is out of service, the degree of availability of the resources on a cloud gets a little blurry but it does not affect the resources available inside the website.
Some cloud platforms are even capable of resisting the loss of a whole data center, since the cloud resources ensemble of cloud resources used is shared among several data centers placed in different place, to share risks among all of them.
Physical security: the physical servers on which this service works are in data centers, for they benefit the security measures that these installations have to avoid that non-authorized people can access physically to them or disrupt its functioning.