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echo: rberrypi
to: ALL
from: DENNIS LEE BIEBER
date: 2021-01-12 12:16:00
subject: Re: My darn NAS...

On Tue, 12 Jan 2021 10:57:04 +0000, Chris Green  declaimed the
following:


>
>bone-debian-9.4-console-armhf-2018-07-08-1gb.img                  100% 850MB 
16.2MB/s   00:52
>
>So I get about half the 'expected' speed, also quite similar to your
>speeds I think.

 Are you taking into account the IP header size, the TCP (or UDP) header
size, and MTU size? The latter will tend to determine how many packets need
to be sent (and for TCP, ACKed). Also, does your transfer method apply any
sort of CRC or ECC logic, which will also consume some space in those
packets?

https://networkengineering.stackexchange.com/questions/19976/trying-to-find-out
-exact-tcp-overhead-cost


--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/

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