About Netcom and the telecommunications mirror of the answer _ outside the star virtual host

1. The premise of using mirroring
First you have to check the download speed between two servers, need to reach more than 100k/s, because, platform many content is need to call the database, if not up to such speed, database calls will be very slow, there is no need to use mirroring.

2. Need to install the main control of the mirror authorization, the specific price can contact customer service staff

3. You can use a dual-line server directly, you do not need to set up two servers, and do not need to buy image authorization.