From Fedora Project Wiki
Mirroring
Introduction
What is mirroring.
As per wikipedia: "In computing, a mirror is an exact copy of a data set. On the Internet, a mirror site is an exact copy of another Internet site."
Mirroring is generally done for several reasons:
- For keeping multiple copies of a particular website to ensure that the contents are easily available and the master website isn't overburdened.
- Contents are downloaded faster.
- In case the master site goes down, the content is still available.