File Upload and copying that file to several servers


I ve got a little rails application to configure another web application. I would like to allow editors to upload graphic files, which will be shown by that web application as a teaser.

My issue is that I have to copy these graphic files to several web servers and I have to guarantee that all servers successfully received these files before I "enable" these new graphics.

Do you have any recommendations? Maybe there is already a plugin?

Thanks a lot in advance.. Volker