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On Fri, Apr 27, 2012 at 11:17:40AM -0700, Chuck Swiger wrote:
> On Apr 27, 2012, at 11:10 AM, Petar Bogdanovic wrote:
> > I'm trying to figure out, why two nearly identical netbsd-6 hosts have
> > troubles using hpn. They are connected through a 5000 Kb/s link and the
> > following (not very scientific) test:
> > dd if=FILE bs=1m count=2 | ssh HOST dd bs=64k of=/dev/null
> > yields different results when defaults are in place (430KB/s) and when
> > HPNDisabled=yes and/or HPNBufferSize=2048 (590KB/s).
> You need to increase the TCP window size to take significant advantage
> of the SSH HPN changes. Take a look at the following sysctls:
> You'll also need to increase NMBCLUSTERS, unless that has become
> a sysctl tunable as well...
Thanks for the hints but I'm not sure I understand the logic behind
this. HPNDisabled=no is the default setting, and I'm not running high
powered n Gigabit-Interfaces so why should a default setting in a rather
unspectacular environment require any additional tweaking?
Or in other words: Wouldn't a HPNDisabled=yes default make more sense?
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