[olug] Network Speeds

Carl Lundstedt clundst at unlserve.unl.edu
Wed Dec 16 22:23:40 UTC 2009


You can use iperf utilities (probably not installed, but easy to get) to
check line speed between the two PCs.  google iperf

Carl Lundstedt
UNL
On Wed, 2009-12-16 at 16:08 -0600, Dave Rowe wrote:
> Any suggestions on bandwidth tests?  Locally between the PCs?  I'm mostly
> concerned about local speeds, since I have little to no control over
> Internet speeds.
> 
> Where would I check for duplex errors?
> 
> -Dave
> 
> On Wed, Dec 16, 2009 at 4:05 PM, T. J. Brumfield <enderandrew at gmail.com>wrote:
> 
> > You can check the switch for errors as well.
> >
> > Check the two PCs. Are you getting duplex errors?
> >
> > You can run a bandwidth test on both PCs.
> >
> > -- T. J.
> >
> > On Wed, Dec 16, 2009 at 3:56 PM, Dave Rowe <dave at roweware.com> wrote:
> > > Okay, I need a little schooling here.  Googling for network tweaks brings
> > > articles from the early 2000's, so things have (probably) changed.
> > >
> > > I have 2 linux boxes, sitting on the same switch (100Mbps).  Transferring
> > a
> > > large (50MB) file between the 2 via SSH seems to run abnormally slow for
> > > being on the same switch.  With a couple tests, I seem to be getting
> > 2MB/s
> > > (big B).  Which, while _okay_, its not a huge deal, but seems slow.
> > >
> > > Box A - Debian 5.0 - 2.6.26-2-amd64
> > > Box B - ArchLinux - 2.6.31
> > >
> > > Would hard-disk speed be a significant factor here?  Both are SATA
> > >
> > > Any ideas?
> > >
> > > -Dave
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