The Azalai software, a MetaOPAC created by CILEA, has found various applications: from MAI, Italian Azalai MetaOPAC, to specialized MetaOPAC such as MAIA for architecture, and MAL, MetaOPAC of the Region Lombardia for public libraries. These services have seen the raising of users and of the applications created to connect a wide number of OPAC. It is evident a regular growth of resources for these systems, and one of these is the webfarm.