TAILIEUCHUNG - cloud computing dummies phần 2

Tương phản này đáp ứng theo yêu cầu với quá trình tại một trung tâm dữ liệu điển hình. Khi một bộ phận để thực hiện một ứng dụng mới, nó đã gửi một yêu cầu đến trung tâm dữ liệu cho phần cứng máy tính bổ sung, phần mềm, dịch vụ, hoặc các nguồn tài nguyên quá trình. | Chapter 1 Grasping the Fundamentals 11 Contrast this on-demand response with the process at a typical data center. When a department is about to implement a new application it has to submit a request to the data center for additional computing hardware software services or process resources. The data center gets similar requests from departments across the company and must sort through all requests and evaluate the availability of existing resources versus the need to purchase new hardware. After new hardware is purchased the data center staff has to configure the data center for the new application. These internal procurement processes can take a long time depending on company policies. Of course nothing is as simple as it might appear. While the on-demand provisioning capabilities of cloud services eliminates many time delays an organization still needs to do its homework. These services aren t free needs and requirements must be determined before capability is automatically provisioned. Application programming interfaces APIs Cloud services need to have standardized APIs. These interfaces provide the instructions on how two application or data sources can communicate with each other. A standardized interface lets the customer more easily link a cloud service such as a customer relationship management system with a financial accounts management system without having to resort to custom programming. For more information on standards see Chapter 14. Billing and metering of services Yes there is no free lunch. A cloud environment needs a built-in service that bills customers. And of course to calculate that bill usage has to be metered tracked . Even free cloud services such as Google s Gmail or Zoho s Internet-based office applications are metered. In addition to these characteristics cloud computing must have two overarching requirements to be effective A comprehensive approach to service management A well-defined process for .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.