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

nfs performance tuning for hp-ux 11.0 and 11i systems page 2

Notes:

Page 2July 22, 2002

agenda

(part one)

• Environmental

Considerations

• Daemons and Kernel

Threads

• Automount & AutoFS

• CacheFS

• NFS PV2 vs. PV3

• NFS/UDP vs. NFS/TCP

An important step in tuning HP-UX systems for NFS performance is to evaluate the

entire environment in which the client and server systems reside. The underlying

network, local filesystems, and operating system patch levels can heavily influence

throughput results.

There are many client and server daemons and threads involved in implementing

the ONC+ protocol suite (including the optional AutoFS and CacheFS products).

The behavior of these daemons and threads, as well as their impact on NFS

performance, is discussed.

Many differences exist between the versions of the NFS protocol itself (HP-UX

currently supports versions 2 and 3). These protocol differences can dramatically

affect performance.

The choice of underlying network protocols, UDP/IP and TCP/IP, can also have a

significant impact on how NFS behaves and performs.