IIS–Web Farm

Web farm

(1) A group of computer systems and Web server software that collectively provide the Web page delivery mechanism in a company either for internal use (intranet) and/or for the public Internet. It is a server farm made up of Web servers (HTTP servers). See server farm.

(2) A group of Web servers that are controlled locally, but centrally managed. Each Web site is administered by its own Webmaster; however, centralized monitoring provides load balancing and fault tolerance. See server farm.

server farm

A group of servers that are housed in one facility. A server farm comprises dozens, hundreds or even thousands of rack-mounted servers, typically running the same operating system and applications. Using load balancing, the workload is distributed among all machines.

Although the terms "server farm" and "datacenter" are mostly synonymous, a server farm often refers to a "darkened" datacenter full of Web servers that is devoid of people except for machine repairs. A general-purpose datacenter, on the other hand, may have human operators at consoles as well as people loading paper in printers and loading and unloading disc and tape cartridges. See clustering, darkened datacenter and telecom hotel.

另一個與應用程式集區有關的特性是，IIS 6.0允許將應用程式集區配置成一個Web園（Web Garden）。要理解Web園的概念，可以設想這樣一種情形：假設有一個IIS 5.0伺服器和三個Web網站，每一個Web網站運行著相同的應用程式，如果IIS 5.0能夠自動按照圓形迴圈的模式將請求依次發送給這些功能上等價、實際上分離的Web網站，將負載分離到三個不同的進程，就可以構成一個小型的Web農場（Web Farm）——這就是Web園。

本文來自CSDN部落格，轉載請標明出處：http://blog.csdn.net/henryhappier/archive/2009/10/31/4750495.aspx