RE: [Nolug] LAN speed confusion

From: John Souvestre <>
Date: Sat, 14 Jul 2012 01:39:27 -0500
Message-ID: <019701cd618b$6d3a5420$47aefc60$>

Hello Petri.


What chatter is there other than the normal TCP overhead? Indeed, short of
dedicated tools, FTP is what is generally used to measure speed.



    John Souvestre - New Orleans LA - (504) 454-0899


[] On Behalf Of Petri Laihonen
Sent: Friday, July 13, 2012 10:40 pm
Subject: Re: [Nolug] LAN speed confusion



Yes. FTP is probably one of the worst protocols AFAIK.
There is so much back and forth chatter that it consumes a lot of bandwidth.

This is most prominent when transferring few hundreds (or thousands) smaller
files vs. same files inside one tar file. I'm sure most protocols have
similar problems.


On Fri, Jul 13, 2012 at 6:17 PM, Ron Johnson <> wrote:

Is ftp really a wasteful protocol?

(Though I do remember that file xfer speeds took a tumble when moving from
BBS/Zmodem to TCPIP/ftp.)

On 07/13/2012 06:06 PM, Petri Laihonen wrote:

My theory is wasteful protocols. (If such terminology even exists)

I have similar observation. Mine maxed out at 12MB as well, though the
speed dropped to 7MB after I converted from single drive on the media
server to Raid6. (Local read/write speeds are now higher, yet transfers
over the network are slower)

I don't trust interwebs speed tests.


On Fri, Jul 13, 2012 at 5:26 PM, Ron Johnson <> wrote:

I've got a bunch of devices at home connected to a Fast Ethernet switch.
  Among them are a Netgear switch (aku), my Linux desktop (haggis) and my
wife's Linux desktop (peanutbutter). So, I should get a theoretical max of
12MBps in half-duplex mode and 25MBps in full-duplex mode.

That's presumably why internet speed tests on both haggis and peanutbutter
show peaks up to 24MBps (close enough to my paid-for max of 25MBps).

Why, then, do xfers (NFS, scp & plain old ftp) between haggis and
peanutbutter max out just under 12MBps?


"There is usually only a limited amount of damage that can be
done by dull or stupid people. For creating a truly monumental
disaster, you need people with high IQs."
Thomas Sowell
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