Hi all, after some double checks and test I still have CentOS nfs client performance not exciting... Just for the record nfs server is Solaris 10. With CentOs client I reach at most ~ 80 MB/s on a gigabit ethernet... I should be satisfied, as it is close to real-world ethernet performance. Nevertheless I have ~100 MB/s with other linux clients (not CentOS). The mount options are the same on CentOS and on Gentoo... rw ,nosuid ,vers = 3 ,rsize =1048576,wsize=1048576,hard,noacl,proto=tcp,timeo=600,retrans=2,sec=sys Also, I've tried another NFS server based on FreeBSD rw ,vers =3,rsize=32768,wsize=32768,hard,proto=tcp,timeo=600,retrans=2,sec=sys (options are results of nfsstat -m). I have ~74 MB/s on Gentoo and 52 MB/s on CentOS... I've tried many wsize/rsize, a bunch of different mount options, but still I can't outperform those values... d Davide Cittaro davide.cittaro at ifom-ieo-campus.it