According to us, this is a good way to assess the risks and benefits of the cloud computing model.

There are many potential benefits for deploying cloud services, including agility, reduced costs, reduced complexity, greater focus, more innovation and ability to leverage the knowledge and skills of people outside the company.

According to the research, the clue for IT professionals is to perform a thorough analysis, which identifies the benefits that the company hopes to achieve by moving to the cloud. There are still reasons to not to take the path of cloud computing. Among them, the inability to obtain service level agreements that you want, regulatory issues and compliance concerns for disaster recovery and the realization that the cloud might end up saving money.

An accurate cost analysis is particularly complicated, since the user is weighing the cost of capital versus recurrent costs. Customers tend to underestimate the costs of using the cloud, and most companies that intend to move toward a model of professional services contracts to manage the process which increases costs.

There are a number of potential risks. Among them, the executive points out, security, transparency and integration issues. If the company decides to start migrating applications to the cloud, it must do so first by the points and then work your way to the core. The most common applications in these first steps are email, development, productivity applications and web servers.

Another point to keep in mind is that the individual business units have probably moved into software as a service (SaaS), so we recommend that IT executives make concerted effort to get ahead.

A cluster can be defined as a system where two or more computers work jointly to perform heavy processing or mission-critical tasks. Basically, any kind of critical application, or applications that cannot stop working or cannot lose data (such as core banking systems, for example) can use the cluster technology.

High Availability: Cluster model is configured to provide an availability of services and resources on an ongoing basis through the use of redundant systems. The general idea is that if one web server in the cluster fails, applications or services may be available on another server. This type of cluster is used for data base of mission critical e-mail, file servers and applications.

Load Balancing: This model distributes incoming traffic or resource requirements on all servers in the cluster. All servers are responsible for monitoring requests and if a server fails, requests are redistributed among the available servers at the moment. This type of solution is usually used in the application servers.

High Availability Load Balancing: As the name suggests, this is a sport that combines features of both types of cluster, thus increasing the availability and scalability of services and resources. This type of cluster configuration is widely used in application servers, web and e-mail.

Main Advantages of the Cluster:

• Scalability;
• High performance;
• High availability;
• Better utilization of server capacity;
• Use of lower-cost servers.

Currently, there are three categories of “clouds“:

1. Public Cloud
2. Private Cloud
3. Hybrid Cloud

Public Cloud Computing – is the IT infrastructure that is used by many companies and services at the same time. Data users of the clouds are not able to manage and maintain this cloud, the entire responsibility for these matters rests with the owner of the cloud. Subscriber services can be offered by any company and individual user. They offer an easy and affordable way to deploy Web sites and business systems, with high scalability, which in other solutions would be available.

Private Cloud Computing – A secure IT infrastructure is controlled and operated for the benefit of a single organization. The organization can manage  its own private cloud or outsource this task from an external contractor. Infrastructure can be placed either on the premises of the customer, or in a data center. Ideal private cloud is the cloud that is deployed in the organization premises, served and controlled by its employees.

Hybrid cloud Computing – Is the IT infrastructure using the best qualities of public and private clouds, with the task. Often this type of cloud is used when an organization has seasonal periods of activity, in other words, once the internal IT infrastructure can not cope with current challenges, some facilities are  transferred to a public cloud (e.g. large amounts of statistical information, which is in its raw form or something that does not represent value for the enterprise), as well as to provide user access to enterprise resources (for private cloud) via a public cloud.