If each Web site has its own application pool (which is a recommended practice for IIS 7.0), it is possible to associate a dedicated FastCGI process pool with each Web site. A FastCGI process pool is uniquely identified by the combination of fullPath and arguments properties when you use the appcmd.exe command to create the process pools. Therefore, if it is necessary to create several FastCGI process pools for the same process executable, such as php-cgi.exe, you can use the arguments attribute to distinguish process-pool definitions. In addition, with php-cgi.exe processes, the command line switch -d can be used to define an entry in the php.ini for the PHP process. This switch can be used to set a PHP setting that makes the arguments string unique. Assume that there are two Web sites (website1. com and website2.com), and each must have its own PHP settings. You can create the FastCGI process pools by using the following appcmd.exe commands: