[olug] Network Speeds

[Jay Swackhamer]

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
>> > _______________________________________________
>> > OLUG mailing list
>> > OLUG at olug.org
>> > https://lists.olug.org/mailman/listinfo/olug
>> _______________________________________________
>> OLUG mailing list
>> OLUG at olug.org
>> https://lists.olug.org/mailman/listinfo/olug
>>
> _______________________________________________
> OLUG mailing list
> OLUG at olug.org
> https://lists.olug.org/mailman/listinfo/olug
>