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

nfs performance tuning for hp-ux 11.0 and 11i systems page 42

Notes:

Page 42July 22, 2002

nfsd

What are the various “nfsd”

daemons and kernel threads?

• nfsd Services NFS/UDP requests and manages

NFS/TCP connections

• nfsktcpd Services NFS/TCP requests

• nfskd Currently serves no useful purpose

Difference between 11.0 and 11i

Default UDP nfsds on 11.0 = 4 Default on 11i = 16

nfsd

The nfsd daemons are primarily used to service NFS/UDP requests. When

NFS/TCP is enabled, a single nfsd is also used to manage the NFS/TCP

connection establishment and teardown functions.

nfsktcpd

The nfsktcpd daemon is the process where NFS/TCP kernel threads associate

themselves. The process is dynamically created by the NFS server’s kernel the

first time it receives a request from an NFS/TCP client. Since the process is

created in the kernel, the parent pid will be “0” and it cannot be killed.

nfskd

The nfskd daemon currently serves no useful purpose on HP-UX systems. It was

originally intended to be the UDP-equivalent of nfsktcpd – i.e. the daemon

process where NFS/UDP kernel threads would associate themselves. HP has

not implemented server-side UDP kernel threads at this time so this daemon

remains idle. Like nfsktcpd, it is dynamically created and cannot be killed.