First of all i'd like to thank for this forum, and sorry for my very bad english.
I'll try to do my best to explain my problems.

In our company there's a joomla based website with a very high traffic. The images joomla directory is on a OCFS2 storage replicated on 3 different machines. The backend joomla side is on another machine, so, please look at the image:
A user can only upload a file to the A machine, a script running every minute will sync the file system in the sense that the file will be "transferred" to the B C D machines to.

Sometimes i find the problem if i upload an image to the A machine i find a 0 byte file in the A, B C and D too.
Any suggestions?