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Cloud Computing

需要的資源與服務,都在雲端上。通常都是用多少算多少,相對的傳統機房不是建太多就是不夠用。

各種雲端比較

Component EnterpriseIT IaaS PaaS SaaS
Application
Security
Database
OS
Virtualization
Servers
Storage
Network
Data Centers

Note: IaaS 的特點應該是可以操作系統層級,PaaS 是可以撰寫指定的語言,SaaS 則是只能使用軟體

Feature

Business Benefits of Cloud

  • Almost zero upfront infrastructure investment,幾乎不用前期投資在基礎建設上
  • Just-in-time infrastructure,隨開即用
  • More efficient resource utilization,更高的資源利用率
  • Usage-based cosing,用多少算多少
  • Reduced time to market,節省資源溝通時間

Technical Benefits of Cloud

  • Automation - “Scriptable infrastructure”
  • Auto-scaling
  • Proactive Scaling
  • More Efficient Development lifecycle
  • Improved Testability
  • Disaster Recovery and Business Continuity
  • “Overflow” the traffic to the cloud