philipp@gris.informatik.uni-tuebingen.de (Philipp) (05/31/91)
Hello,
We have got the problem that SGI and HP workstations don't like to work
together via NFS. Here is the problem:
We have a large network (university) with several SGI-workstations on the
backbone net.
Attached to it is a HP discless cluster (5 HP400t at one server) that
is connected to the backbone by a UNIX-PC (386 running Interactive Unix) that
is only acting as a router (no other tasks).
Connections from either the HP's or the SGI's to other hosts on the net (via
the router or not) are no problem, but access between SGI and HP (either
direction) don't work. The problem is mostly apparent on large files, when
a programm accessing it, halts with the message 'NFS server not responding'.
After a while the message 'NFS server OK' appears, but (on the next package ?)
we start again with 'not respondig'.
Small files seem to be ok, most of the time.
Maybe others have had this problem before an can send suggestions on a fix.
Any help is welcome.
Here the data on the machines:
HP: Serie 9000, HP400t, HP-UX 7.05 (7.03 is same problem), 16MB, 3x660MB SCSI
disks on the server.
SGI: W-4D210GTXB and W-4D25TG-I, IRIX 3.3.2, 16MB, 300MB local disk each
Network:
The backbone is a thick ethernet, while the cluster is on a thinwire.
.
. (lots of other machines) .
. . ( 5 more HP's)
| +----------+ .
+---------------| SGI | |
B | +----------+ | +---------------+
a | +-----| HP Client |
c | +----------+ | +---------------+
k +---------------| SGI II | |
b | +----------+ | +---------------+
o | +-----| HP Server |
n | +----------+ | +---------------+
e +---------------| UNIX PC |------------+
| +----------+
.
.
Philipp Slusallek Universitaet Tuebingen, WSI/GRIS
Auf der Morgenstelle 10-C9, D-7400 Tuebingen, FRG
Email: philipp@gris.informatik.uni-tuebingen.de Phone: +49-7071-295462
--
Philipp Slusallek Universitaet Tuebingen, WSI/GRIS
Auf der Morgenstelle 10-C9, D-7400 Tuebingen, FRG
Email: philipp@gris.informatik.uni-tuebingen.de Phone: +49-7071-295462mg@ (Mike Gigante) (06/01/91)
The problem may be the PC router - we had a similar problem at this site (b/n two SGI machines) The PC ethernet cards have a small (4k? ) buffer, anyhow smaller than the default packet size in NFS. You can change the NFS packet size to be smaller that the PC buffer and then things worked for us. see the nfs man poage for details. Mike Gigante, RMIT Advanced Computer Graphics Centre