12-27-2011
Hi jembalang, I'm not sure about the NFS version provided with HP-UX 11i version 1.6, but the problem with the time only can appear if you are using NFSv4 with Kerberos, but in this case, you can be sure that you will have a lot of "permission denied" errors, and this is not the case. So, after that, with no more data, I think that you can have a latency problem in the network between the NFS server and the client or a heavy load in the server. Also, try to see in the client logs what is the exact time when you have the NFS problems and try to see in the server if you have automatic snapshots at the same time, the I/O error in the client log can be related to a change in the NFS share.
Anyway, always is a good idea to sync all the machines in your environment.
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LEARN ABOUT HPUX
nfs3_do_readdirplus
nfs3_do_readdirplus(5) File Formats Manual nfs3_do_readdirplus(5)
NAME
nfs3_do_readdirplus - turn on or off NFS version 3 readdirplus functionality on the NFS server
VALUES
Failsafe
Default
Allowed values
DESCRIPTION
controls the ability to turn on or off the NFS version 3 readdirplus functionality on the NFS server. If this functionality is turned off,
the client is forced to use the readdir functionality instead.
Who Is Expected to Change This Tunable?
The distributed file system administrator should examine this value if performance issues are being experienced when reading large directo-
ries.
Restrictions on Changing
The tunable is dynamic; tuning will take effect immediately on the running system.
What Are the Side Effects of Turning Off the Readdirplus Functionality?
By forcing the client to use readdir instead of readdirplus, the client is no longer following the NFS version 3 protocol. If problems
occur, turn back on.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by HP.
SEE ALSO
kctune(1M), sam(1M), gettune(2), settune(2).
Tunable Kernel Parameters nfs3_do_readdirplus(5)