[rescue] Slow NFS between Sun-3 and Raspberry Pi 2

Patrick Giagnocavo xemacs5 at gmail.com
Tue Mar 29 18:46:14 CDT 2016

My guess is window size, rsize and wsize are the settings.  Find out
the defaults on the Linux side and make the other side have the same.

On Tue, Mar 29, 2016 at 5:17 PM, Shawn Neely <maxweb at pacbell.net> wrote:
> I recently got a diskless Sun-3/60LE up and running NetBSD 7.0 using a
> Raspberry Pi 2 B (running the latest Debian/Raspbian Jessie) as a network boot
> and NFS server.B  I'm still working out a few kinks, but the first is the slow
> speed of my network file accesses.
> I measured SD card write performance directly on the RPi2B like this:
> $ cd /tmp
> $ time sh -c "dd if=/dev/zero of=ddfile bs=8k count=250000 && sync"; rm
> ddfile
> The above test averages around 11 MB per second.B  However, when I run the
> exact same command on the Sun-3/60LE in a FreeBSD shell, using the same SD
> card (NFS-mounted in this case) for storage, I get only about 100 KB per
> second... less than 1% of the speed measured on the RPi2B.
> The Sun-3/60LE AUI Ethernet is attached to a 10Base-T adapter and a router
> running DD-WRT in Client mode which also connects the RPi2B via Cat-5 cable.B
> I'd expect to get about 1 MB (10Mbps) through the Ethernet connection, but I'm
> still an order of magnitude off that, throughput-wise.
> Any thoughts or suggestions?B  Compiling a simple hello_world.c program takes
> a good 5 minutes with this set-up.B  Could the router be the problem?B  My IP
> addresses are static so maybe I could just try a simple hub instead, but I
> like the fact that the router in Client mode provides WiFi network access for
> both machines.
> Another thought is to find an external SCSI-1 drive to mount locally on the
> Sun-3/60LE, and just use the RPi2B for network booting.
> Or maybe there are NFS or mount options I can set to make things faster?B  I
> basically just copied some steps I found online
> here:http://jonsip.sdf.org/netboot.txt
> which adds the following lines to /etc/exports on the RPi2B side:
> /export/sun3/root sun3(rw,no_root_squash)
> /export/sun3/swap sun3(rw,no_root_squash)
> /export/sun3/usr sun3(rw,root_squash)
> /export/sun3/home sun3(rw,root_squash
> and the following /etc/fstab lines on the Sun-3/60LE side:
> nfsserver:/export/sun3/swapB B B  noneB B B  swapB B B  sw,nfsmntpt=/swap
> nfsserver:/export/sun3/rootB B B  /B B B  nfsB B B  rw 0 0
> nfsserver:/export/sun3/usrB B B  /usrB B B  nfsB B B  rw 0 0
> nfsserver:/export/sun3/homeB B B  /homeB B B  nfsB B B  rw 0 0
> Any bits of wisdom or other thoughts regarding file I/O speed improvements
> would be most appreciated!
> thanks,
> Shawn NeelyOakland, CA
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