[olug] Network Speeds

[Dave Rowe]

Heh *slaps head*

Okay, testing with the raw SCP, yields MUCH better results, ~12MB/s.  My
initial tests were with Konqueror and fish://

So, now I know what the culprit is.

Off to Google.

Thanks

On Wed, Dec 16, 2009 at 4:26 PM, Jay Swackhamer <Jay at reboottheuser.com>wrote:

> You can use 'ethtool' to get stats. i.e.
> ethtool -S eth0
>
> Based on my experience/observation, You should be able to do around
> 10Megabytes/sec on an scp between linux boxes. It's limited by the
> software, so 10-11Megabytes/sec on a 100 or 1GB link is fine with scp.
> An ftp/http transfer could go to 80-100MB on a gigabit link.
>
> I've only seen speeds down to 2-3MB/s when using a windows client, but
> never between linux boxes.
>
> How much memory is in each box?
>
> Have you tried doing an scp on each box individually to itself?
>
> What make/model switch do you have?
>
>
> --
> Jay Swackhamer
> Reboot The User
> 402-933-6449
> http://www.reboottheuser.com
> http://www.cafepress.com/rtu
> http://stores.ebay.com/RebootTheUser
> http://www.hotr.com
>
>
> Quoting Dave Rowe <dave at roweware.com>:
>
> > 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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