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 :: Mailing Lists

[ILUG] tuning NFS over a wireless LAN

[ILUG] tuning NFS over a wireless LAN

Justin Mason jm at jmason.org
Wed Jul 11 14:17:19 IST 2007


paul at clubi.ie writes:
> On Wed, 11 Jul 2007, Justin Mason wrote:
> 
> > "bing" reports around 15Mbps pretty consistently.
> 
> 'bing' likely isn't measured sustained, reliable bandwidth.. ;)
> 
> > However -- a wget reports 790.96K/s... so that's pretty similar to 
> > what NFS is getting!
> 
> Tada.
> 
> > Maybe it's just the limits of TCP over that link itself, then. 
> > Pity, given that iwconfig reports a bit rate of 24 Mb/s and the 
> > bing results above. looks like I need to tune *that* instead!
> 
> Isn't it the case that with 802.11 that the useable bit-rate is only 
> half the link bitrate? I.e. 24Mb/s is only 12Mb/s really.
> 
> (I dont remember, but there's some level of that kind of thing in 
> 802.11 anyway).

But even so -- 12 Mbits/sec == 1.5 Mbytes/sec, which is twice what the
TCP-using app is seeing: 790Kbytes/sec.  I seem to be missing something
there?

--j.



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