perfSONAR User Q&A and Other Discussion

[Brian Tierney <>]

With 909 retransmits, you will never get much about 1Gbps.

How "full" is that path? Is there a firewall on the path? Also look at
errors on all your router / switch interfaces.
There may be a dirty fiber.




On Fri, May 2, 2014 at 1:52 PM, Koch, Brian 
<>
 wrote:
> Latency shows ~0.7ms with 0% loss.
>
> -----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



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

Energy Sciences Network (ESnet), Berkeley National Lab

http://fasterdata.es.net