perfSONAR User Q&A and Other Discussion

[Brian Tierney <>]

Brian: What latency is the path you are testing? Does owamp show any
packet loss on that path?

Try doing a test with iperf3, which will give you TCP retransmit  count.

bwctl -c hostname -I iperf3 -i1 -fm -x -t20




On Fri, May 2, 2014 at 7:47 AM, Aaron Brown 
<>
 wrote:
> Hey Brian,
>
> Unfortunately, there’s not a way to do multiple streams currently. The idea 
> was to show how single stream performance looked since any network can be 
> made to look good with enough streams :) The next version of the Toolkit 
> should include the ability to configure number of streams, however.
>
> Cheers,
> Aaron
>
> On May 2, 2014, at 10:04 AM, 
> 
>  wrote:
>
>> Is there a way to run multiple data streams? I'm not sure why the data 
>> path is
>> fully tested.
>> Connections:
>> Perfsonar --> core router (10G)
>> core router --> firewall (10G) (fw throughput = 2G)
>> firewall --> outside WAN router (10G)
>> outside WAN router --> perfsonar (10G)
>>
>> Theoretically, I should be seeing close to 2Gbps on my bwctl graphs, but
>> graphs are barely showing over 1Gbps.
>>
>> Are there some settings I need to tweak? I'm a little new to this.
>



-- 
Brian Tierney, http://www.es.net/tierney

Energy Sciences Network (ESnet), Berkeley National Lab

http://fasterdata.es.net