Testing network connectivity on a server with Gigabit Ethernet

gigabitgigabit-ethernetnetwork-speed

I have a box with Gigabit Ethernet, and I'm unable to get past about 200Mbps or 250Mbps in my download tests.

I do the tests like this:

% wget -6 -O /dev/null --progress=dot:mega http://proof.ovh.ca/files/1Gb.dat
--2013-07-25 12:32:08--  http://proof.ovh.ca/files/1Gb.dat
Resolving proof.ovh.ca (proof.ovh.ca)... 2607:5300:60:273a::1
Connecting to proof.ovh.ca (proof.ovh.ca)|2607:5300:60:273a::1|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 125000000 (119M) [application/x-ns-proxy-autoconfig]
Saving to: ‘/dev/null’

     0K ........ ........ ........ ........ ........ ........  2% 5.63M 21s
  3072K ........ ........ ........ ........ ........ ........  5% 13.4M 14s
  6144K ........ ........ ........ ........ ........ ........  7% 15.8M 12s
  9216K ........ ........ ........ ........ ........ ........ 10% 19.7M 10s
 12288K ........ ........ ........ ........ ........ ........ 12% 18.1M 9s
 15360K ........ ........ ........ ........ ........ ........ 15% 19.4M 8s
 18432K ........ ........ ........ ........ ........ ........ 17% 20.1M 7s

With the constraint that I only control one server which I want to test, and not the sites against which I want to perform the tests, how do I do a fair test?

Basically, is there some tool that would let me download a 100MB file in several simultaneous TCP streams over HTTP?

Or download several files at once in one go?

Best Answer

Aria2 is command line tool similar to wget that supports multiple simultaneous downloads over http , bittorent, ftp etc.

aria2c -d /dev -o null  --allow-overwrite=true -x 15 url  --file-allocation=none

Download file with 15 connections to /dev/null.

--allow-overwrite prevents aria from trying to rename /dev/nulll.

I prefer not to start allocating space before the download since it takes time for the download to start

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