In each group, a memory process plays the role of a link process (LP) (see Fig 4). It is dedicated to the communication between groups. When a memory process attempts to access to an object belonging a different group, it sends its request to the LP. This Link Process will communicate with the others LP of the virtual architecture to find the requested object. The LP is the only entry point in the groups (special data are managed by these LP to know the name of objects shared by each group).