Uploaded File Replication in cluster

We are using jboss-as-web-7.0.2.Final with Linux , Postgresql , Mod_cluster as Load balancer .
Our goal is to achieve 2 or 3 Node in cluster.
Using jboss-as-web-7.0.2.Final we get HttpSession replication + Cache Replication.
We want same thing for Uploaded file replication.
Meas when we upload image file or some other file in cluster it must have to replicate to all node in cluster .
we d'nt want to store file in database b'coz of large size and we r using database replication so it take lots of Network traffic.
We have look GridFilesystem but it store file in memory which is not acceptable due to size of Heap .
We want some solution from JBOSS side that one or more directory in cluster sync with each other .....so that any file uploaded in this Direcory all Node in Cluster get same File.
In case, Node which handle client request crash then other Node must have knowledge to handle request related with Uploaded File on previous Node.