| |November 20209On PremiseDimensionPrivate CloudPublic CloudScalabilityImplementation Lead TimeUpgradeOn Demand deploymentInfrastructure setup TimeServer DeploymentUpgrade to Latest TechnologyAccessibilityCustomizationLicensesStorageRequires capacity planningHighDifficultHighHighPhysical and Virtualised DifficultRestrictedCustomizableExisting licenses can be re-usedDedicatedHighly ScalableLowEasyLowMediumVirtualisedEasyRestrictedCustomizableExisting licenses can be re-usedDedicatedHighly ScalableLowEasyLowLowVirtualisedEasyMultitenantStandardExisting licenses cannot be re-usedCommon with Logical SeparationThe key difference between public and private clouds highlighted here is obvious: Public clouds remove or reduce responsibility for datacenter facilities maintenance, networking, and hardware provisioning and maintenance. The Responsibility Factor makes the public cloud especially attractive for:· Companies with no existing datacenter facilities for which datacenter excellence is a non-differentiating business factor;· Companies that want to get out of the datacenter business, usually for manageability or cost concerns;· Enterprises with heavy compliance requirements. Using a public cloud platform with pre-audited facilities for PCI, HIPAA, SOC 2, FISMA, etc. compliance provides an immediate benefit by removing an enterprise's responsibility (and associated staffing and audit costs) for maintaining compliant corporate datacenters. Enterprises must sign a Business Associate Agreement (BAA) with the public cloud vendor.· Complex public clouds require very specialized skills to orchestrate cloud resources in a way that is secure and highly available. In other words, there are many reasons to choose public cloud, but enterprises need to know that maintenance responsibilities are not inconsequential. Enterprises must then decide whether they want to manage their public cloud infrastructure themselves or outsource it to a managed cloud services provider. A managed cloud services provider can maintain the entire cloud infrastructure (web servers, application servers, load balancing, custom failover scripts)SummaryIn today's digital world and ever evolving business needs, Cloud implementation as an option needs to be considered. Option of Public or Private Cloud basis the IT security needs, scalability, and speed to market is the need of the hour. Companies adapting to customer needs and digital transformation will remain in the race for future. Deciding on the right mix of public, private, and on-premise architecture is complex and time- consuming. Often the right solution depends as much or more on business requirements and roadblocks as on technological requirements. However, the organizational process of auditing, migrating, and optimizing the IT architecture will ultimately result in infrastructure that is more secure, available, and high performing. C I
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