Posted on 2005-11-08 10:26
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體系結構
從架構的服務級別上總結架構師所要的做的工作就是在有限資源下權衡并且做出
系統的最佳架構 來保證
Scalability - the ability to support the required quality of service as the load increases
Maintainability - the ability to correct flaws in the existing functionality without impacting other components/systems
Reliability - the assurance of the integrity and consistency of the application and all of its transactions. Reliability spans from the OS to the Application to the service provided.
Availability - the assurance that a service/resource is always accessible
Extensibility - the ability to add/modify additional fuctionality without impacting existing functionality
Manageability - the ability to manage the system in order to ensure the continued health of a system with respect to scalability, reliability, availability, performance, and security.
安全性是目前比較難解決的機制。
在架構的定義中，必須包括了持續性，分布，通信，事務管理以及安全管理等基礎性建筑。
滿足系統的業務和服務級別需求，是架構師的目標。在有限的資源下，盡大可能的滿足是職責。而提高滿足是架構師的能力。