Two boxen need to be in sync on a load balanced #Drupal setup. How to keep the files in sync ? #NFS, #Unison or #Rsync?

The file sites/guy.cognasium.com/modules/cumulus/cumulus.js is missing. Please download it from http://pratul.in/files/cumulus.js, and add it to the Cumulus module folder!

mrchrisadams (Chris Adams):Two boxen need to be in sync on a load balanced #Drupal setup. How to keep the files in sync ? #NFS, #Unison or #Rsync?