perfSONAR User Q&A and Other Discussion

["Roderick Mooi" <>]

Hi Brian, Jason

I didn't look at the CPU load or number of iperf processes unfortunately. I 
rebooted the system because of updates installed and not specifically to 
address the performance problem. I'll definitely look out for this in future 
though - it's a good point as we've had problems with rogue iperfs before - 
thanks!

Roderick

>>> On 2014-04-10 at 17:31, Brian Tierney 
>>> <>
>>>  wrote:
> 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 
> 
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-- 
This message is subject to the CSIR's copyright terms and conditions, e-mail 
legal notice, and implemented Open Document Format (ODF) standard. 
The full disclaimer details can be found at 
http://www.csir.co.za/disclaimer.html.

This message has been scanned for viruses and dangerous content by 
MailScanner, 
and is believed to be clean.

Please consider the environment before printing this email.