perfSONAR User Q&A and Other Discussion

[Mark Gordon <>]

Hello everyone,

        I was working with querying utilization data from 
measurement archives when I noticed one was reporting utilization 
data for an interface greater than it's capacity.  The interface in 
question is istf-bckp.rt1.bud.hu.geant2.net (62.40.125.65) 
outbound.  At the time I was querying the utilization was 6% over the 
capacity, but extending my search backward a little showed that it 
had been up as much as 60% above capacity.  I queried the MA with the 
following interface ...

....<nmwgt:interface 
xmlns:nmwgt="<http://ggf.org/ns/nmwg/topology/2.0/>http://ggf.org/ns/nmwg/topology/2.0/";>
....    <nmwgt:hostName>rt1.bud.hu.geant2.net</nmwgt:hostName>
....    <nmwgt:ifName>so-6/0/0</nmwgt:ifName>
....    <nmwgt:ifDescription>LowQ Link to ISTF 2 (Pr:T-Systems 
Id:041/3001)</nmwgt:ifDescription>
....    <nmwgt:ifAddress>62.40.125.65</nmwgt:ifAddress>
....    <nmwgt:direction>out</nmwgt:direction>
....    <nmwgt:authRealm>GEANT2</nmwgt:authRealm>
....    <nmwgt:capacity>155520000</nmwgt:capacity>
....</nmwgt:interface>

and got the following datum like this back

....<nmwg:datum timeValue="1184141100" value="2.5468027626764405E8" 
valueUnits="Bps"/>

2.5468027626764405E8 = 254680276
254680276 > 155520000

Thanks
-Mark