#Online mirror software
#Online mirror download

Notable websites with mirrors include Project Gutenberg, KickassTorrents, The Pirate Bay, WikiLeaks, the website of the Environmental Protection Agency, and Wikipedia. The primary mirror sites distribute to secondary mirrors by using rsync to ensure integrity of files and file consistency with the master mirror. New Mirrors use HTTPS and support IPv6 along with IPv4.

Debian removed FTP access to its mirrors in 2017 because of declining use and the relative stagnation of the FTP protocol, mentioning FTP servers' lack of support for techniques such as caching and load balancing that are available to HTTP.

#Online mirror download

Some of these networks, such as Info-Mac or Tucows are no longer active or have removed their mirrored download sections, but some like CPAN or the Debian package mirrors are still active in 2019. Download archives such as Info-Mac, Tucows and CPAN maintained worldwide networks mirroring their content accessible over HTTP or anonymous FTP. Mirror sites were heavily used on the early internet, when most users accessed through dialup and the Internet backbone had much lower bandwidth than today, making a geographically-localized mirror network a worthwhile benefit. These sites are called partial mirrors or secondary mirrors.

#Online mirror software

The maintainers of some mirrors choose not to replicate the entire contents of the upstream server they are mirroring because of technical constraints, or selecting only a subset relevant to their purpose, such as software written in a particular programming language, runnable on a single computer platform, or written by one author. Mirror sites are particularly important in developing countries, where internet access may be slower or less reliable. The purpose of mirrors is to reduce network traffic, improve access speed, ensure availability of the original site for technical or political reasons, or provide a real-time backup of the original site. Mirror sites are often located in a different geographic region than the original, or upstream site. Such sites have different URLs than the original site, but host identical or near-identical content.

The concept of mirroring applies to network services accessible through any protocol, such as HTTP or FTP. Mirror sites or mirrors are replicas of other websites or any network node. Replica of website components hosted elsewhere