Definitions: Types of Deployment Models and Clouds
Cloud has commonly bestowed as a singular configuration/option once there are many flavors. It is overwhelming for growing little and medium businesses to differentiate between forms of cloud, abundant less to know the strengths and weaknesses of cloud suppliers themselves. Consistent definitions of forms of cloud offerings area unit associate degree in the vital initial step to putting together structure awareness of the variations. Key ones to know area units are as follows:
• Public Cloud: Public cloud computing relies on a service composition model and on-demand delivery of IT resources via the web with a pay-as-you-go valuation. it’s sort of a utility as a result of its computing setting where unrelated customers will acquire technology like cipher power, storage, databases, and other services on an associate degree as-needed basis.
• personal Cloud: Dedicated IT services (located either at an organization website or hosted by a third-party offsides provider) are delivered on a cloud design wherever IT practicality is delivered as a service, accessible by subscription with pay-as-you-go chargeback models and use is restricted for users in a very single organization.
• Hybrid Cloud: the combination and orchestration between a personal setting together with on-premise and private cloud, and one or a lot of public clouds.
• IaaS: Servers, system management, and security services, delivered via a public or personal cloud.
• PaaS: Application development/deployment, and middleware delivered via public or personal cloud services model.
• Hosted: Servers, system management, associate degreed security services area unit in an IT services knowledge center versus on the business’s own premises. The business could or might not additionally use service suppliers to manage completely different aspects of the infrastructure.
Once businesses have made the decision to move to the cloud, often the next decisions are what workloads to move to the cloud and which cloud provider to use. When it comes to deciding the cloud path forward, small and medium businesses need to consider a number of factors about the implementation itself, as well as ongoing considerations to plan the journey correctly.
One key factor to take into consideration is what workload is to be moved and why. A common misconception is that the right deployment model for one workload is the right deployment model for all workloads in the organization, but this is sometimes not the case. Migrations must be evaluated on a workload-by-workload basis as factors such as cloud
suitability, workload performance requirements, and cost feasibility must be considered.
Cloud suitability means evaluating the sensitivity and complexity of the workload as well as the current challenges with the current model of deployment, to determine if the business case is appropriate, feasible and within acceptable risk levels. Cloud performance is about understanding that different clouds are optimized for different applications and other workloads.
It is important to assess how each workload will perform in each cloud environment to ensure a good experience for the best business value.