淺談雲端運算

2012年時，為了想讓人更容易了解什麼是雲端運算，於是就把當時我對雲端運算的了解整理並寫成文章 -「淺談雲端運算」，沒想到今天一看，國內居然有10篇論文引用它，真是欣慰，沒辦法對國內證券產業雲端服務應用盡到什麼心力，但還是能幫助國內學生快速了解雲端運算，也算是一點小小的貢獻吧。

[轉錄 ] Peter Thiel’s CS183: Startup—Stanford

以下是轉錄 Stanford CS 183: Startup 的課程筆記

Tiers of Data Center

Tier Level	Requirements
1	Single non-redundant distribution path serving the IT equipment Non-redundant capacity components Basic site infrastructure guaranteeing 99.671% availability
2	Meets or exceeds all Tier 1 requirements Redundant site infrastructure capacity components guaranteeing 99.741% availability
3	Meets or exceeds all Tier 1 and Tier 2 requirements Multiple independent distribution paths serving the IT equipment All IT equipment must be dual-powered and fully compatible with the topology of a site's architecture Concurrently maintainable site infrastructure guaranteeing 99.982% availability
4	Meets or exceeds all Tier 1, Tier 2 and Tier 3 requirements All cooling equipment is independently dual-powered, including chillers and heating, ventilating and air-conditioning (HVAC) systems Fault-tolerant site infrastructure with electrical power storage and distribution facilities guaranteeing 99.995% availability

reference: http://en.wikipedia.org/wiki/Data_center#Data_center_tiers