Introduction
"Cloud" era has been fully opened. Business benefits not only attractive, fast cloud technology is mature, public cloud services have sprung up, and the private cloud has proven to be robust and secure platform for a variety of business applications. The problem is not whether to use the cloud, but how to use the cloud to optimize business performance and cost-effective information systems and technologies.
The question now is: every application, or a group of related applications, belong to what kind of environment? Original public cloud computing environments, private cloud, hybrid cloud or organization? The individual "work load" on where to deliver the best performance, cost and flexibility combined? From this perspective, we will filter through three basic conditions - to assess some typical workloads, to show you how to answer this question - economics, trust and functionality. Cloud computing basics and cloud services, recommended reading before the forum article:
Three models of cloud computing: public cloud, private cloud and hybrid cloud
Three types (SaaS, PaaS, IaaS) cloud computing services
More information
Cloud Business Benefits :
Potential economic benefits of cloud computing is undoubtedly compelling:
- By means of a private cloud platform, organizations can more efficient use of its technology and reduce the space and cost of the physical infrastructure (including energy costs). Traditional data center costs will be substantially reduced.
- Due to economies of scale public cloud can reduce e-mail and collaboration workspaces and other commercial services cost allocation of resources. With software as a service, you can reduce the cost of using and maintaining business applications. With pay-per-use models, applications and ongoing costs of other services will be reduced and consistent with actual business needs.
- By optimizing across public cloud, workload distribution and management of private and hybrid clouds, the organization may be their IT infrastructure and personnel total expenditure reduced by 25-30%.
While these direct cost savings and reduce the cost structure has been attractive, but cloud computing maximum return also reflected in the other two business advantages:
- Productivity. Business people can demand access to more information and tools they need such information. They can more easily collaborate and share information, expertise and other resources. Daily information management system operations and significantly reduce the workload of IT staff so they can focus more on technology-driven business improvement.
- Agility. On-demand access to modular information assets, we can bring together new business capabilities and quickly bring innovative products to market. Then, they can expand the scope of application of these innovative products and integrate them into business operations while minimizing disruption. They can also access a record in a short time, test and deploy new cloud-based business applications and services.
Clouds can simultaneously improve business performance from many aspects: cost, manageability, information access, new functionality deployment, coordination and collaboration, business continuity and security, business innovation and growth. This is the best way to obtain tissue function, performance, and cost from the computing environment.
Use three filter for workload analysis:
Companies should assess which specific applications and information for cloud computing and cloud types their best applicable. This involves the possibility of moving to the cloud through three filters (economy, reliability and functionality) and understand each asset.
After applying the three filters, candidates range (especially short-term migration for the cloud) will be reduced, and each deployment target of choice for cloud workloads will appear. The results of these three filter combination, after considering the interaction of these results, and then adjust. For example, if you keep the workload due to the use of security features or enhancements to adjust its trust profile and generate additional costs, the "total" cost may change. Remember, for business performance and agility reasons, may not be marginal economic return as a judge that a workload is not suitable for cloud standards.
The workload is mapped to the cloud options :
Typically, you'll find extensive use those acceptable and less than 100% or less of the availability of workloads for public cloud (for example, e-mail, collaboration space, and time and expense reports, etc.). Most core business applications - especially custom applications, or tightly integrated with other applications, applications, or must perform mission-critical application service level agreements - ownership of private clouds. E-commerce applications and other market-oriented workloads may require hybrid cloud to quickly scale to meet peak demand. High degree of specialization operational control systems and fine-tune workloads remain in the original environment. However, this distinction is more general. There are many variations, so the organization must be a detailed assessment of its workload.
逐个评估工作负载后，形成总体概念。工作负载跨平台的新分布将是什么样子？关键信息将如何跨工作负载和平台流动？接口如何工作？对经济性、可信度和功能性的总体影响如何？
不要放在云中的内容：
- 自包含和专业化程度高的业务应用程序，如金融服务中的实时制造控制系统和分析交易系统。这些在特定业务职能内将成为复杂的“重负荷”系统，且共用这些资源的价值有限。它们可能会定期连接到基于云的系统以获得最新信息，但是以云服务客户的形式，而不是在云中托管的资源。
- 出于法律或监管原因（如当地隐私法律）而必须绝对与计算环境的其他部分“隔开”的应用程序和数据库。公司倾向于以物理方式隔离此类资源，以实现安全。但是，借助最新虚拟化管理方法，企业在私有云中可以管理的这类敏感资产通常会超出设想数量。
- 针对特定（有时是专有）系统体系结构编写并进行了性能优化的应用程序。随着时间推移，可以选择将此类资产翻新为在云中共享和运行。
参考
EMC技术白皮书
《Optimizing the journey to the cloud: balancing trust, economics, and functionality》
应用于
云服务