Am Mittwoch, den 10.12.2008, 20:07 +0100 schrieb Davide Cittaro:
Hi all, I'm migrating from Gentoo to CentOS... I'm experiencing a rather low performance in NFS r/w (as client).
I am not the Linux Expert when it comes to the nfs implementation, but you should try two things:
1.) Nail Linux to use nfs v3 (imho mount option nfsvers=3) 2.) Use TCP, UDP Transmits are often slow these days. (mount option tcp)
NFS server is solaris (which exports zfs volumes via nfs). The very same exports were mounted with the same parameters (auto,nosuid,exec) on gentoo and centos server (bot x86_64)... It happens that centos is 5-10 times slower either in read and write operations... Ok, I'll try to tune rsize and wsize, but does anybody have an hint on this low performance?
Maybe gentoo uses v3 per default. We have made great improvements at our site with these mount options.