Re: [A bit OT] Diagnosing home network
On Thu, Jun 01, 2017 at 10:39:07AM -0000, Dan Purgert wrote:
> Curt wrote:
> > On 2017-05-26, Mark Fletcher <mark27q1@gmail.com> wrote:
> >>>
> >> It seems like you read my original problem as slowness accessing the
> >> internet. That isn't the problem, I'm concerned about intra-LAN speeds.
> >> Haven't even got the length of worrying about internet speeds yet, since
> >> there are so many variables that can impact that, I have to be sure my
> >> end is in tip-top shape before I start poking at that.
> >
> > Intra-LAN speeds; I thought you were speaking of transferring a movie
> > file(?) between two computers on your LAN [...]
>
> Think he goofed the word, but intranet ("LAN") speeds would affect
> transferring a movie.
>
No "goof"ing involved, thank you very much -- at least not at this end.
Intra-LAN means exactly what it says -- inside the LAN. "Inter" means
"between" -- "intra" means "inside". You seem like a native speaker of
English, I would have expected you to know that. Apologies if I am
wrong.
The original reference was in reply to a reply to my original post, in
which the replier explained how their inTER-LAN, that is from one
network to another (local LAN to internet, in this case) connection was
set up -- indicating the poster of that reply had not understood what I
was trying to do.
> > [...] which couldn't proceed any faster than the receiving end could
> > write that file to disk? I mean, would that not be a limiting factor,
> > even with a quantum link?
>
> I/O speeds of the drives are definitely a factor -- but pretty much
> anything relatively decent (i.e. not those godawful 5400 RPM laptop
> drives) can read fast enough to saturate a wifi link. On the "writing"
> side, it's buffered to RAM first, so that'll help (even with a godawful
> slow 5400 RPM laptop drive).
>
> SSD's shouldn't have much trouble (though, does kind of depend on the
> SATA bus).
>
Receiver is a high-end laptop hard disk. Based on regular usage of the
laptop I am extremely confident it is fast enough to not be a factor.
The overall machine is pretty zippy, even hobbled as it is by Windows
8.1. The sending end is an SSD mounted on a machine running Jessie.
Again intra-machine (that word again!) suggest the machine itself is
healthy and performant.
Next steps on this are for me to follow the advice I've received here
and try iperf, which I will hopefully have time to do this weekend. I
see there is a Windows version and that the Linux version is part of
Jessie. I don't think I am going to have a lot of luck with running on
my AP as it is not, to my knowledge, running an OS that will let me run
arbitrary software (and I think I'd sort of be uncomfortable if it were)
but at least I can put iperf on the two endpoint machines, and on two
wired LAN machines, and compare. I will post back here if I find
something interesting.
Mark
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