Our NFS implementation, NFSP (NFSParalì ele) aims at providing some transparent ways to aggregate unused disk space by means of dividing a usually centralized NFS server into smaller entities: a meta-data server and I/O servers. This paper illustrates the issues related to increasing the performances of such an implementation. Two different approaches have been taken: distributing the load across several servers and implementing the server in a more efficient and intrusive way (in kernel mode). The results obtained with both versions are given and compared to the ones of the first user-mode implementation.