Public cloud computing provisions for on-demand, dynamically, shared, fine grained utility based computational resources via the Internet. The economies of scale generated, the centralization of utility administration, and outsourcing of infrastructure and software applications and their maintenance are attractions. Concerns around security, privacy and bandwidth are possible detractions.

Experts round the world have opine that private clouds may gain popularity in the short run, but the public cloud will soon overtake it. Cloud economics will drive the choice and many of the issues surrounding public clouds will be resolved advantageously. The highlights of the economics are that there will be a supply side savings due to the scale of operations and cloud data centres have lower costs per server. There will be a demand side aggregation in that the cloud can support intermix of tenants and directly contribute to higher server utilization rates.

Multi-tenancy efficiency will consequently, drive down administrative costs, overheads, and by extension, the enterprise outlay for computing resources.

Riding the public cloud requires enterprises to reverse engineer their computing resources. Good reverse capacity planning can help organizations leverage the advantages of the public cloud. They should desist from focusing on how much capacity they need. They must concentrate on how they can reduce their capacity footprint and harness the power of the public cloud for all their computing resource needs. They need to understand how much computing capacity is actually used and scale back on unused resources for optimization of capacity and taking advantage of elasticity of public clouds.

Public cloud adoption hurdles are hard to overlook, but maturing public cloud computing models are expected to revolutionalize public cloud computing. As businesses begin to look more seriously at SaaS (Software as a Service) or IaaS (Infrastructure as a Service) and try to get more ‘bang for the buck’, newer, sophisticated technologies will emerge making the public cloud as viable and attractive, if not more attractive, than the private cloud.

Further, public clouds will make it possible for enterprises to review and achieve specific requirements in areas such as business agility, flexibility and efficiency. They will be able to expand the geographical boundaries of their organization and deploy a large mobile workforce. Most bedrock elements will be impacted—the processes, the culture, the metrics, the performance, the funding and the service levels! Enterprises will find that they can take a quantum leap at a nominal cost by riding on the public cloud!