I am trying to convince our sysadmins to upgrade from NFS 3 or NFS 4 because I think that this will result in a dramatically performance improvement, especially when dealing with many small files.
However, my colleagues are afraid that an upgrade will cause severe problems. Currently, our infrastructure consist of both Solaris SPARC and Linux x64. We use a big NetApp Storage system for the most shares which currently provides only NFS 3.
What advantages (and disadvantages) can you see for an upgrade to NFS 4? Which problems may arrise? Do you already have any experiences with such an upgrade?
Any help is appreciated.