NFS Performance Notes for Red Hat Enterprise Linux 3.0 AMD64
Problem: RHEL 3.0 on x86_64 nfs performance doesn't go well (or at all over weak network links (like VPNs)).
Our solution has been to make this setting in /etc/init.d/autofs:
This should force the options to be effectively
tcp,v3,rsize=32768,wsize=32768,hard at mount time. In the WS_U3 release, you can modify /etc/sysconfig/autofs, but this file does not appear to be present in AS or AS_U1, meaning that you have to modify /etc/init.d/autofs directly.
Note that there appears to be a maximum limit of 800 or so simultaneous mounts.
If you get an error message like
nfs bindresvport: Address already in useThis is related to the autofs bug when aggressively mounting many nfs-over-tcp filesystems (
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=128966)