perfSONAR User Q&A and Other Discussion

["Koch, Brian" <>]

Well, if I manually run 4 parallel streams, it goes up to 3.7Gbps. What can I 
do to the regular tests though to exercise this better?

-----Original Message-----
From: Brian Tierney 
[mailto:]
 
Sent: Friday, May 02, 2014 3:35 PM
Cc: Koch, Brian; 

Subject: Re: [perfsonar-user] bwctl speed questions

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