NFS slow

[Ulrich Deiters]

On a B160L (under HP-UX 10.20)
file export via NFS is done at 1 MB/s
(cp FILE /net/elsewhere/ ...) whereas
the import (cp /net/elsewhere/FILE .)
is rather at 1 MB/min. What slows the
machine down? (LVM?)

[Pedro Sousa]

Maybe you should install the patch PHNE_20957. This is not know as a critical patch, but it solves some slow NFS responses.
good luck.

[Vincenzo Restuccia]

You can see s700_800 10.20 NFS Kernel General Rel & Perf Patch(PHNE_22877)

[Brian Hackley · Accepted solution]

Hi,
There are a couple of things that do come to mind. First of all, how many biod's are in use. The default is 4. Try 16. If that does not help. try 0 (zero). Check nfsstat -rc to see how many timeouts you get.
Detailed NFS Performance Assessment documents are available in the HP IT Resource Center Knowledge Documents KBAN00000261 and NETUXKBRC00006283
Hope this helps,
-> Brian Hackley

[Ulrich Deiters]

Starting 16 biod processes did not help, but killing all biods did it!

Why is the NFS client system working at all? Is it safe to run the system without "resident" biod processes?