Cloud computing has been mainly classified into three forms: public clouds, private clouds, and hybrid clouds. Organizations make use of all three types of cloud implementations: public, private and hybrid to get the best results in line with their business and IT requirements. Adoption of cloud or the process of cloud transformation is gaining momentum due to the benefits of cloud such as faster time to market, streamlined processes and flexible infrastructure costs. The foremost challenge for any organisation, through a cloud transformation is to determine the right cloud path for their business enterprise. They have to analyse their requirements, goals and come up with the best cloud strategy. Often business enterprises adopt the hybrid cloud strategies, whereby services are consumed and span across multiple platforms.
Services and infrastructure on a public cloud environment are provided off-site over the Internet. Mostly, public-cloud services are multitenant, where the provider runs the solution in a shared environment with highly complex security models in place and follows the “pay-as-you-go” pricing model. Public cloud provides an on-demand solutions, which is an ideal solution for small to medium sized businesses and for organisation’s having fluctuating IT resource demands. The primary benefit of any public cloud is the speed with which IT resources and service catalogs can be deployed, and the utility billing it offers. Public cloud follows the the Opex model over the Capex model, which moves spending from a large up-front number to one distributed over time. They provide scalability and reliability, already set up by the cloud provider, without having to build anything in house. Amazon AWS, Microsoft Azure etc., are some of the best examples.
Private clouds provide the benefits of self-service model, automation, consolidation, metered usage, flexibility, scalability, automation and monitoring, almost all the features that are provided on public cloud’s but behind the safety of a organisation’s private firewall within their own private network. Organistaions can build private clouds within their own data centers, using various IaaS implemention tools, creating virtual servers that may reside on any number of available physical machines. Private clouds provides greater levels of control, compliance and security, making it ideal for larger businesses or those with strict data, regulation and governance obligations. Private cloud’s are further classified mainly into 2 categories which are On-Premise Private Cloud and Externally-Hosted Private Cloud. They also require Capex beyond the current needs of the organization and are suitable for organisations, large enough to run a next generation cloud data center efficiently and effectively on its own..
Hybrid cloud helps to bridge incompatible clouds and traditional on-premises environments to operate fluidly as one. With hybrid clouds, organizations mix and match public cloud with private cloud and leverage the best of what each has to offer in terms of a solution perfectly matching your business needs. Hybrid cloud environment is capable of providing on-demand, scalability and effectively manage any unexpected surges in workload.