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

nfs performance tuning for hp-ux 11.0 and 11i systems page 21

Notes:

Page 21July 22, 2002

Performance Enhancing Defect Fixes

• Most NFS mega-patches contain some defect fixes that

directly impact performance, for example:

Ø JAGad14221

Client performance is degraded as shown by "nfsstat -c", it

makes unnecessary GETATTR calls for each read or write on files

opened with synchronous I/O flags set; and synchronous I/O

mode remains in effect for subsequent opens on an NFS file

opened once with synchronous I/O flags set.

Ø JAGad16541

CPU time is wasted by unnecessary calls to compare_cred

function in NFS PV3 client code

patching

The NFS lab releases mega-patches quarterly. These patches frequently include

defect fixes that impact performance as well as behavior.