I would like to set up multiple wiki sharing only
I see that different wikis can make use of images uploaded to the
commons. Thats waht i would like to have.
The problem imho is (?), that they have to share some parts of the
database regarding images. How is that possible?
Normally, each hosted wiki will exist in its own database on the same
The shared image host wiki (for instance Wikimedia Commons for our
installation) is one of these, and you will want to provide its database
name in $wgSharedUploadDBname.
If using multiple table prefixes in a single database, then you would
set $wgSharedUploadDBprefix as well.
Take a peek at the comments in DefaultSettings.php for these variables
and the settings around them for some more hints.
-- brion vibber (brion @ pobox.com