Large companies began using this term to refer to those services hosted on the network. In fact that is the first thing most of us come to mind about "Cloud Computing". Therefore, we can say that the word cloud would be equivalent to what we know as the Internet. However, the concept has much more scope and is something that we intend to relate in this article.
Types of cloud
There are currently 3 types of clouds:
- Public clouds: These are those that are administered by the service provider. The great advantage of them is that they do not require an initial investment to start using them and do not entail a maintenance expense for the consuming customer. These clouds are shared with other customers within the provider's data centers.
- Private clouds: Private clouds, unlike public clouds, are managed by the client to gain greater control. Due to this, it implies an initial investment in the infrastructure since it will be hosted on-premise, ie at the client's premises. As a main advantage, the customer enjoys a cloud of his property where he is the only one who resides in it, although the maintenance costs are borne by the owner.
- Hybrid clouds: Finally we have this intermediate option between the two previous clouds. While they say that this type will be the most widespread in the future, it is not as defined as the rest. The main idea is that the customer will be able to keep control of those main applications and delegate the administration in which they consider secondary.
Types of services
Once you have covered the types of clouds that exist, what can we do with them?
Depending on the need we need to cover, there are different types of services within cloud computing:
- Infrastructure as a Service (IaaS): This type of service offers us the necessary infrastructure to be able to upload our environment and also to run proprietary software on it. The two fundamental pillars are computing and storage as a service. Sometimes they refer to IaaS as HaaS (Hardware as a Service). As examples of this type of services we can mention GoGrid and Amazon EC2 (Elastic Compute Cloud).
- Platform as a Service (PaaS): When we talk about the platform within the cloud, the service we offer is the environment where we can directly deploy our applications. The clearest examples in this section are the Windows Azure platform by Microsoft and Google App Engine .
- Software as a Service (SaaS): The last service, and one of the best known by the market, are those transformed into final applications provided by the provider, ready to be used by customers. In this type of service we are assured the maintenance, the support and the availability of the software. Within this set, we can find Microsoft Business Productivity Online Standard(BPOS) which is a set of well-known applications in its online version like SharePoint Online , Exchange Online , Office Live Meeting and Office Communications Online . Another group of applications within this area would be Salesforce, Known mainly for its CRM in the cloud, and Basecamp where its flagship product is its collaboration tool for projects.
As an advantage of this administration and development model, we can highlight the cost savings as the most important, in addition to the high scalability, reliability, as well as the abstraction of hardware maintenance, something up to now innovative in large companies with its own department ITEM.
One of the concepts that best define the cloud environment is the term "Pay as you go", which means that we only pay for usage and not a monthly fixed fee, such as traditional hosting services.
Lastly, it is worth mentioning the agility with which we have these services, achieving in a matter of minutes a putting into production that could take months, when dealing with the traditional on-premise process.
While it is true that the advantages of cloud computing are worth considering, there are some points that can be crucial when it comes to hitting the cloud:
First, there is the perception of insecurity in moving our information out of our physical reach, which can manifest a sense of vulnerability. To solve this "fear" among potential customers, large cloud companies have efficient, high-security systems to keep data safe from potential attacks.
Another drawback is dependence on an Internet provider. Due to the location of the services, we are tied to this need, so it is advisable to have a second connection in case of failure of the main.
Although less and less, there is still some immaturity in some of the services offered by lack of functionality, in relation to similar products designed to meet these needs in servers within the client.
In this section, we have been able to know the concept of cloud computing as the technological proposal of large companies to refer to the different services hosted on the Internet, as well as the different types of clouds available in the market. In addition we have listed the types of services available to date and how some companies already offer them to the public.