perfSONAR User Q&A and Other Discussion

[Brian Tierney <>]

Did you happen to check the CPU load before you rebooted?

I've occasionally see a iperf server go out of control and take over a
core. Killing all iperfs and restarting bwctld fixed the problem.



On Thu, Apr 10, 2014 at 12:39 AM, Roderick Mooi 
<>
 wrote:
> Hi
>
> Referring to the attached graph, a few days ago the incoming throughput to 
> one of our ps servers dropped drastically. Some troubleshooting revealed no 
> explanation but isolated the problem to the server (or server-router 
> interface). Yesterday (9 Apr), the server was updated around 9:00 and 
> rebooted at 15:00. The problem disappeared (the graph indicates around 
> 12:00) following the update and bwctl test results resumed to normal. Does 
> anyone have an explanation for this?
>
> The yum history is also attached if needed.
>
> Thanks!
>
> Roderick
>
>
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-- 
Brian Tierney, http://www.es.net/tierney

Energy Sciences Network (ESnet), Berkeley National Lab

http://fasterdata.es.net