Hi everyone. I have a web application running on JBoss and we are setting up a cluster  to serve this app. This webapp allow users to upload files and those files are stored on a system folder.

I've already succesfully setup the cluster environment, but we now have the issue that those uploaded files will be distributed between both servers.

Which technique you would recomend to sync a folder between both servers and guarantee that files are available at both cluster members?

Servers are running on CentOS 5 Linux. We already came up with rsync and unison but both are reactive, and we need something that can automatically sync then in almost real time.

Thanks in advance