Subject: Re: Netatalk wire speed
From: Jeff Thompson (jeff@zaius.org)
Date: Wed Feb 21 2001 - 23:53:51 EST
Niall-
> I need to copy about 13GB of files from a Linux box to a G3 Powerbook. The
> Linux box is running 1.4b2+asun2.1.3 (it's stock SuSE 7) and the Powerbook
> has mounted the filesystem using TCP (I hope - I entered the server IP
> address rather than picking it by name from the Chooser so that should do
> it, no ?).
yes, this forces the connection over TCP
> The server has a 3C509 card and is connected to the Powerbook by
> a crossover cable, and the link lights indicate that 100 MB is active. When
> I drag the relevant folder to the Powerbook (containing about 18000 files)
> it trundles away for a while, counting up to the number of files, and then
> starts copying. The estimated varies as a few files are copied, but it's
> always around 40 hours. Now cutting corners here and there this equates to
> an approx. transfer rate of ~ 5MB / minute - this is just a tad below the
> wire speed of a 100 MB network.
Yep, that's very slow.
> Now I know that afp won't really approach wirespeed, even over TCP rather
> than Appletalk, but even so ~ 5MB / minute seems a bit slow. Anyone have
> any suggestions ?
My #1 bet is a bad cable.
#2: You're server's loaded with something else and afpd can't get the cpu
cycles (or disk I/O's) it needs to send the data.
#2a: You're getting the 100MB light on the card, but the server only
recognizes it as a 10MB link (driver issue). Even then, it should be a tad
faster than 5MB/min.
#3: Your server (if it's normally connected to a larger network, ie the
Internet) is trashing itself trying to get some outside connection while it's
connected via the crossover cable to your 'book.
#4: Your powerbook's ethernet port is messed up (it's happened to mine)
I hope this helps
-- -Jeff Thompson (http://jeff.zaius.org) jeff@zaius(.dyndns).org, jeff@artifex.org, jeff@kinkaid.orgIf you keep anything long enough, you can throw it away.
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