SUMMARY: Problems with NFS between v5.0 and v5.1

[Jan Brueninghaus <Jan@xxxxxxxxxxxxxxxxxxxxxx>]

Thanks all for helping!

Problem: 
NFS-Client Tru64 v5.1 with NFS-Server Tru64 v5.0
Accessing data larger than a few kB fails.

errors in messages on the client:
May 18 22:47:25 omega vmunix: NFS3 server delta not responding still trying
May 18 22:47:37 omega vmunix: NFS3 server delta ok
May 18 22:47:38 omega vmunix: NFS3 server delta not responding still trying

errors in messages on the server:
May 18 22:47:23 delta vmunix: svckudp_send: xdr_replymsg failed
May 18 22:47:23 delta vmunix: rfs_dispatch: sendreply failed IP address: 
129.217.226.24

All other network operations work fine, even a NFS-import from Tru64 v4.0E 
works without problems.


Solution:
John Lanier recommended to check if NFS is working over UDP or TCP, because 
there are patches for v5.0 for NFS over TCP.
By checking out this with "mount -l -t nfs" i notices that wsize and rsize 
were different. The NFS-import from v4.0E had wsize=8192 and rsize=8192, 
but the NFS-import from v5.0 had wsize=32768 and rsize=32768. So I changed 
this to wsize=8192 and rsize=8192 and everything works fine.

It seems that Tru64 v5.1 had used this options automatic, because I mounted 
without giving wsize and rsize. But adding this for the imports from v5.0 
solves the problem.

Regards

--
Jan Brüninghaus
Universität Dortmund
Jan@xxxxxxxxxxxxxxxxxxxxxx