gb spam wrote:
> On 4/25/06, Tim <ignored_mailbox@xxxxxxxxxxxx>
> wrote:
>
>>For a brute force check, you could transfer a
> large number of bytes from a byte generator
> (/dev/zero?) to /dev/nul, and time it.
>
> To transfer 1G
>
> One one host run
>
> nc -l -p 30000 > /dev/null
>
> On the other host run
>
> time dd if=/dev/zero bs=1M count=1024 | nc \
> first-hostname 30000
>
> Depending on your version of dd it may or may not
> display a throughput, so you may have to calculate
> it yourself freom the time displayed
Am I right, that the throughput here is 1 Giga BYTES,
which is 8 Giga bits?
On a 1 Gigabit/s network, this then should ideally
take about 8 seconds; right?
I do following:
master$ nc -l -p 30000 > /dev/null
slave$ /usr/bin/time -p dd if=/dev/zero bs=1M \
count=1024 | nc master 30000
which typically prints out:
real 16.20
user 0.00
sys 0.54
This means that I have effectively a network speed
of about 0.5 Gigabits/sec (as it takes 16 seconds
instead of the ideal 8 seconds).
Is my conclusion right?
Thanks,
Rob.
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