[geeks] Well, THAT was a setback

[gsm at mendelson.com]

On Tue, Jan 19, 2010 at 07:44:43AM -0500, Phil Stracchino wrote:

>Your experience differs from mine.  Testing via FTP between Solaris and
>Linux hosts, I routinely see an honest 95-98 megabits across my network
>on 100Mbit NICs and switches, as long as the source machine can sustain
>that transfer rate.  I have to wonder what you're doing (or not doing)
>to be getting such poor performance.  (Though "AFP" gives me a clue; my
>experience is that Macs have *always* been sluggish relative to other
>machines with comparable processor speed and memory.)

What I'm NOT doing is mixing bits and bytes. The original quote was
40megaBYTES per second for the tape drive, so I converted my figures
into bytes. 

A single bit serial link (e.g. 100BaseT) has a RAW bit rate of 100 megaBYTES
per second, or 12.5 megaBYTES. So if I said I was seeing 3-4 megaBYTES per
second throughput, that translates to 24 to 32 megaBITS per second,
sustsained rate. 

Note that that is a shared rate, it might be higher with a direct connection
between the computers and no one else sharing the "ethernet".

Geoff.


-- 
Geoffrey S. Mendelson, Jerusalem, Israel gsm at mendelson.com  N3OWJ/4X1GM
New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge or
understanding, as in he has a sub-wikipedia understanding of the situation. 
i.e possessing less facts or information than can be found in the Wikipedia.