perfSONAR User Q&A and Other Discussion

[Terrence Martin <>]

So as requested in the LHC/USCMS I have perfsonar installed on our cluster in 
a spare node. It is still not clear to me, what is the value to me, as an 
administrator of a CMS T2 site of having this service? I have looked through 
the web interfaces, and aside from being fairly cryptic and offering several 
uninteresting tests between my browser and the node I do not see much else. 

Since I do not really care about my browser on my desktop on the 100Mbps 
building network and really care about my cluster and its two 10Gbps uplinks 
(one to ESNet) how do I use these system to improve the reliability and 
performance of my cluster? For example does this node upload data on a 
constant basis to a central site? Does it report information like CMS SAM? 
Does it run tests periodically between it and other nodes to develop a map of 
the current weather of the network? The Pinger service seems to be capable of 
collecting some sort of network data, and I saw some graphs when searching 
online, but aside from seeing UCSD-T2 in the configuration it is not clear to 
me how to actually get anything out. 

For example, what URL(s) do I enter in the PingER GUI?

Terrence