Subject: Re: Network throughput and upgrading kernel questions
To: None <>
From: Henry R. Bent <>
List: port-vax
Date: 05/02/2003 06:31:17
Blaz Antonic wrote:
> Hello,
> I was downloading some stuff with my VS3100/m38 yesterday and i noticed
> i get different throughput when using Lynx (preferred because i can
> browse FTP sites) and wget:

I know this isn't exactly what you're looking for, but I have a 4000/200 machine
(about 5 MIPS; same SOC CPU) to do comparisons with so it's only a little faster
than yours.  However I should note that the 4k/200 has SGEC while you're using
LANCE ethernet.
> When downloading something from external (outside local network) FTP i
> got throughput of ~50 KB/s with Lynx and ~60 KB/s with wget;

Interesting.  I find that wget and lynx can usually get about the same overall
speeds of 60KB/s here (512Kbit cable modem), and if anything lynx is a little
faster.  I take it you're using both lynx and wget from pkgsrc?

> When downloading something from local FTP (another box on same network
> segment) i got throughput of 150 KB/s with Lynx and 220 KB/s with wget.

Huh.  My 4k/200 is packed up at the moment (I'm in the process of moving) but I
usually see local speeds of around 500KB/sec with both lynx and wget.  Are you
using the local disk or are you running over NFS?  It's possible in either case
that the disk interface or the overall system bandwidth are limiting transfer
speeds; in any case it seems like you should be getting better speeds using
either program.  You don't happen to be using a local MFM disk?  My experience
with those drives is that they're pokingly slow.

If you are using a local SCSI disk, is it possible you could benchmark with
another drive?  When I upgraded my DECstation 5000/120 from an RZ58 to a
somewhat more modern Quantum drive (both ~1GB) I saw a decent performance
upgrade even though both disks should be able to achieve the maximum thoroughput
of the SCSI controller.

Henry Bent