On Mon, Nov 02, 2009 at 01:30:18PM -1000, Michael Painter wrote:
Nathan Ward wrote:
On 3/11/2009, at 10:56 AM, Mark Urbach wrote:
Anyone have a good solution to get "accurate" speed results when testing at 10/100/1000 Ethernet speeds?
An NDT server?... such as: http://ndt.anl.gov:7123/
I just tested that server, and couldn't get any results which were even vaguely close to accurate. Of course it probably didn't help that the only routes I could find to the test server were either Chicago - Palo Alto - Chicago or Chicago - Ashburn - Chicago, but this doesn't seem like it would ever be useful for testing gigabit anything. For end user testing, I've actually seen reasonable results from speedtest.net. http://www.speedtest.net/result/610596179.png for example, better than ndt.anl.gov at any rate. :P For quick and dirty high speed Internet testing up to a gigabit, this is my favorite standby (it often helps to eliminate your local disk from the equation by writing the downloaded file to /dev/null too):
fetch -o /dev/null http://cachefly.cachefly.net/100mb.test /dev/null 100% of 100 MB 102 MBps
But the best (and conveniently enough the most commonly used) tool for in-depth high speed testing was already mentioned, iperf. Another useful tool if you're trying to troubleshoot tcp issues is http://www.tcptrace.org/. -- Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)