Thread:Project:Support desk/How mediawiki work with multiple servers?

For example assume I have 3 servers. I set up A as database and the other two B C as web servers. Mediawiki were installed on both B and C servers, and both of then connect to the only database.

If I upload image when visiting B server, the C server will have the description page but not able to access image file (due to upload to other server).

In other words, how could I set Mediawiki so that all servers could upload and modify image on same single location?