Public Cloud, Private Cloud, Hybrid Cloud, Multicloud … with the the arrival of the internet, Cloud computing has become an ever-present reality that is constantly evolving. How do we define these different types of Cloud? How is Multicloud distinguished from Hybrid Cloud? What are the advantages and the characteristics of each one of these solutions employed by company IT services? Here is an article that will allow you to clarify…
What is a private, public or hybrid Cloud ?
Here are some fundamentals to remember: in the world of Cloud computing, the terms public Cloud, private or hybrid refer to different Cloud structures that each respond to specific company needs.
The public cloud is a flexible and open structure, managed by a third-party provider. Several users, whether they are individuals or companies, can access it via the Internet. With the public Cloud, the same I.T. resources will be provided by the supplier to be shared by multiple users. It can be summarized as the possibility to use I.T. resources with owning them. These are, for example, public Cloud services, the most common of which include VOD (Video on Demand) services or even document storage services like Google Drive, Hubic or Drop Box.
A private Cloud relates to an entire infrastructure dedicated to a unique company that can be managed internally or by a third party and hosted internally or externally. If the Cloud is hosted by a service-provider, the collaborators of the company can only access it by secure networks called VPN. The private Cloud is particularly suitable for big companies or ones whose activity requires strong protection regarding criticality and data security. For example, a private cloud will allow a rigorous database to be used with a budget that is better controlled than it would be on a public Cloud.
And the hybrid cloud? It’s a mixed structure, an alternative solution that allows the combination of private Cloud resources with those of the public Cloud. A company that uses a hybrid Cloud can, for example, have recourse to the public Cloud occasionally during peak activity and the rest of the time, settle for resources available internally in its private Cloud. The goal of the hybrid Cloud is, therefore, to make the most of these 2 services in order to create an optimal solution. The hybrid Cloud will allow, particularly, to facilitate data, application and service transferability and will offer more choice in terms of deployment models.
All of these types of Clouds will offer users access to three types of services. The company (or the individual) will then be able to have access to infrastructure as a service (Iaas), platform as a service (PaaS) and software as a service (SaaS).
The Multicloud or the future of Cloud computing ?
Convinced by the suitability to integrate a public Cloud in their IT system, and therefore to develop hybrid Clouds, companies are confronted however with a new problem: how to choose the right Cloud when their applications have different and sometimes contradictory needs and constraints. The Multicloud strategy will allow a customized solution to be adopted when managing different types of Clouds (public or private) within the same organization.
The process of being able to host a virtual infrastructure on-site and off-site increases I.T. flexibility and dynamism. However, it is supported by an increasing complexity of self-service systems. Whether for governance, conformity, financial controls or even capacity planning, the Multicloud management and automation tools will offer more visibility and coherence on all of these different resources.
No Cloud solution is able to do everything; therefore, the Multicloud allows different cloud resources to be linked in a coherent and operational manner. For example, when the material and software deployed independently by the members of an IT team increases to such a point that they require heightened surveillance, it may not be necessary to migrate the infrastructure and data to a dedicated system. A deployment of ‘’Shadow IT’’ will then be added to existing Clouds, leading in this way to the creation of a Multicloud within the company I.S.
The advantages of the Multicloud facing the hybrid Cloud
We’ve seen it: a Multicloud creates the deployment of many Clouds of the same type, which are public or private, provided by different suppliers. The hybrid Cloud involves the deployment of different types of Clouds (public and private) that will be linked by integration or orchestration functions.
A Multicloud can be composed of two public Cloud or two private Cloud environments. A hybrid Cloud can be composed of one pubic Cloud and one private cloud environment with an infrastructure that improves the transferability of workload. The two approaches can be combined and adopted at the same time. This is observed in most of the companies that look to improve the security and performance in a wide range of environments.
Companies wish quite simply to have more options. With several Cloud suppliers to take over different applications, they can use the solution which corresponds most accurately to their needs in optimizing their operational budgets, security and the efficiency of their I.T. systems.
The Multicloud approach consists more and more of customized solutions. This allows deployment of an expertise and operational direction to handle the growing complexity of I.T. resources. In offering a center of unique services, supported by centralized directional portals, the Multicloud approach authorizes efficient management of several Clouds. This is why if the hybrid Cloud continues to be a growing trend, most companies today will set up Multicloud strategies adapted to their activity. Lastly and especially, these strategies avoid dependence on only one supplier.