Typical Network Performance

David Kelly dkelly at hiwaay.net
Mon Aug 2 12:44:23 UTC 2010

On Aug 1, 2010, at 11:31 PM, Corey Smith wrote:

> On Sun, Aug 1, 2010 at 7:30 PM, David Kelly <dkelly at hiwaay.net> wrote:
>> Gigabit ethernet from a 2.8 GHz P4 to or from MacPro I am only limited by disk data rate. About 60 MB/sec on one end of the disk, more on the other end of the disk.
> Did you try realtime monitoring your network interface?
> # route -n get <remoteip>
> interface: <yourinterface>
> # netstat -I <yourinterface> -w 1

No. I saw numbers that I was reasonably happy with and didn't pursue further.

> Do you see errors on the interface?

Nope. 60 MB/sec via FTP is about 60% of gigabit and was faster than some disk accesses.

> # netstat -I <yourinterface>
> Another trick to eliminate disk io from the equation is to use nc:
> machine1 <freebsd>:
> # nc -o -l 2000 > /dev/null
> machine2:
> # dd if=/dev/zero bs=1M count=50 | nc machine1 2000

60 MB/sec was the average over gigabytes of data. Real data. Real network wire.

David Kelly N4HHE, dkelly at HiWAAY.net
Whom computers would destroy, they must first drive mad.

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