[ILUG] tuning NFS over a wireless LAN

[Pádraig Brady]

Justin Mason wrote:
> hey all -- another question! What are the best NFS mount options to use
> for NFS over a local WLAN?
> 
> I have an NSLU2 connected to a Linksys WRT54GL via local 100Mbps ethernet.
> I also have a Dell laptop running Ubuntu Feisty, associated with the
> WRT54GL over 802.11g wifi. The laptop->WRT54GL link is 18Mb/s right now
> according to "iwconfig"; "bing" reports 12.337Mbps between the laptop and
> the NSLU2.
> 
> The laptop is running 2.6.15, the slug 2.4.22.
> 
> I currently use these mount options:
> 
>   noauto,noatime,rsize=8192,wsize=8192,nfsvers=3,rw,hard,intr,tcp,timeo=20
> 
> I'm already using "tcp" since apparently wifi and UDP don't get on too
> well. Can anyone suggest additional suitable optimisations?
> 
> One of the uses will be to access a reasonably large library of MP3s,
> fwiw.

So reliability rather than speed is what you want?
I.E. layer 1 is the most important consideration?
Personally when accessing the internet using my wireles
through my DSL modem, I fix the rate to 2Mb/s using:
  sudo iwconfig eth1 rate 2Mb/s fixed
I find the autospeed negotiation problematic.
Note you probably can fix a higher rate, since I've
got 530-700mm walls in my house.

Note you can get better control over the WRT54GL (wireless power)
by installing DD-WRT. Definitely recommended:
http://www.pixelbeat.org/systems/WDS/

Pádraig.