NFS Performance Tuning for HP-UX 11.0 and 11i Systems

nfs performance tuning for hp-ux 11.0 and 11i systems page 96

Notes:

Page 96July 22, 2002

nfs/udp

vs.

nfs/tcp

How is 11.0 NFS/TCP support

different from 11.i?

Difference between 11.0 and 11i

Ø When HP-UX 11.0 released, the only network transport available to

NFS was UDP. NFS/TCP support was added in March 2000.

Ø Even when the March 2000 patches are installed on HP-UX 11.0

systems, UDP remains the default protocol used by NFS.

NFS/TCP support must be manually enabled via the new

setoncenv(1M) command. Once NFS/TCP support has been

enabled, TCP becomes the default protocol used for NFS.

Ø On 11i, TCP is the default protocol for NFS.

When HP-UX 11.0 shipped it only supported NFS running over UDP. HP added

support for NFS/TCP via the kernel and user-space NFS patches released in March

2000. Any HP-UX 11.0 NFS patches released after March 2000 also contains this

functionality. Since new NFS patches are released periodically, be sure to consult

HP Support or the IT Resource Center web site – http://itrc.hp.com – to obtain

information about currently available NFS patches.

After installing these patches on both the client and server (assuming both systems

run HP-UX 11.0), the system administrator must enable NFS/TCP functionality

manually via a new command called setoncenv(1M). Again, this must be done on

both the NFS client and the server. Once enabled, TCP becomes the default

network transport for new NFS mounts.

On HP-UX 11i, TCP is the default transport used for NFS mounts.