Commons is a multimedia project; its primary dump should be its media.
This is not currently so, which is confusing; and the lack of that media dump is hidden in every place where dumps are discussed (or linked to ancient dumps from ~2013.)
A Commons media dump should be made again on a regular basis.
- It is urgent to have a current dump made and mirrored (_there is a deadline_, for our systems too)
- It is important to have a periodic update, at least annually
- Many commons files are already in public archives (such as the Internet Archive or Library of Congress), and include links to those archival sources in their metadata. The most useful dump would be of images that are not already sourced to one of those archives.
As of 2021 we have regular backups for Commons media working (T262668#7332883 - thanks @jcrespo @ArielGlenn and others!) but no public dumps of them.
These backups are not world-readable, nor accessible to would-be mirrors.