Microsoft Web farm framework and server farms

The cluster system NLB that comes with Windows 2008 can only detect the IP layer. Even if IIS cannot provide services, the link will still be imported to the faulty server. You need to use Arr (http://www.iis.net/download/ApplicationRequestRouting) if you need to be able to detect whether the IIS service is stopped ). Application Request Routing (ARR) is introduced in IIS 7.0, which can be used to check the IIS status based on the HTTP status. At the same time, ARR also provides up to six Server Load balancer solutions for selection, to configure arr, you must install Web platform installer.

 

 

Command Line view server farms Configuration

% Windir % \ system32 \ inetsrv \ appcmd.exe list config-Section: webfarms
% Windir % \ system32 \ inetsrv \ appcmd.exe list config-Section: system. webserver/Rewrite/globalrules

% Windir % \ system32 \ inetsrv \ appcmd.exe list config-Section: system. webserver/Rewrite/Rules 

 

Http://technet.microsoft.com/zh-cn/library/cc772200 (ws.10). aspx

 

Comparison of network load balancing (NLB) and application Request Routing (ARR:

First, arr serves as the gateway server. IIS on it cannot deploy websites, but can only jump to other content servers (Web servers ). NLB automatically allocates access by setting the cluster IP address.

 

Second, arr can check whether the website can be accessed by setting the health test in server farms. NLB does not have this function.