Reasons for Replicating Data

According to a study done by Krishna Bharat and Andrei Brodner there are several reasons why data are replicated or why mirror sites are created – Load Balancing, High Availability, Multi-lingual replication, Franchises or Local versions, Database Sharing, Virtual Hosting, and Maintaining Pseudo Identities.

In load balancing, replication of data is done to decrease the servers’ loads. Instead of just having one server to handle all the traffic from web surfers interested in the data or content, the site is mirrored or the data replicated so that the traffic is split between two or more servers.

Virtual hosting also sometimes result in mirroring. This happens to services with different websites and host names but use the same IP address and server. What happens is the path to one site is the valid one while the path to the other site simply gives an identical webpage as a result.

Google’s Webmaster Guideline about Duplicate Content

Search engines are blatantly against replicated data so much so that Google even has a warning against them in their Webmaster Guidelines. Google’s Webmaster Guidelines were a list of Do’s and Don’ts that ought to be followed by websites to help the search engine in finding, indexing, and ranking websites. Following the Do’s will of course increase the chance that Google will list a specific website and ran it favorably as well. However, doing any of the Don’ts will of course detract from a website’s rank.

Valid Mirrored Sites

However, for valid mirror sites like those mentioned above (multi-lingual, franchise, etc.) there should be no worry since search engines have provisions for such things and take into account the motive behind them. You can help your mirror site by making sure that you follow all the other guidelines to get noticed and ranked by Google. Following the guidelines will surely help not only your ranking with Google but with other search engines as well.