Re: [Madwifi-users] Fast rate, slow transfer?

[Matt F. <mat...@cl...>]

Quoting Josh (Norm) Audette (no...@gn...):
> Thanks for the excellent responses.  Considering this new information,=20
> and now that I think a little bit more about how I was doing the=20
> transfer (thanks for the hints), the rate I was getting seems pretty good.
>=20
> The transfer was done using rsync -av -e ssh.  I don't know how much=20
> overhead the -v adds, but tunnelling through ssh would certainly add=20
> some.  The wireless connection was also encrypted, which should add even=
=20
> more overhead.
>=20
> Maybe I'll give the same file transfer a try using my 802.11b PCMCIA=20
> card and see how well it performs under the same conditions.
>=20
> Thanks again for the info.
>=20
> Cheers,
> Josh

Hi again Josh,

Using rsync over ssh will probably introduce a really high overhead to
your test, since it both encrypts and compresses the data being
transferred.=20

For a more representative figure, you should try using netcat, i.e.
one the client end:

# nc -l -p 3210 > output_file
and on the server end
# nc client_hostname 3210 < hugefile

To give some idea of figures, transferring a 100Mb ISO between my pc and
laptop give me ~13MB/s (I think my laptop's disk is the main bottleneck
there).=20

Transferring the same file over my wireless card, which is about 1M away
=66rom my AP, I get ~3.1Mb/s (just glancing at gkrellm).

Have fun,

matt

--=20
Time exists so that everything doesn't happen at once,=20
space exists so that everything doesn't happen to you.
Matt Foster | http://www.mattfoster.clara.co.uk=20