perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

Hi Jim;

This is a performance-node specific issue, so I am going to cross post 
to performance-node-users.  The list is here if you are interested in 
joining:

  https://mail.internet2.edu/wws/info/performance-node-users

We have had reports on this issue before and are working on a fix for 
version 3.2.  The problem is that the javascript plotting library 
(Google Visualization API) does not properly support time ranges and 
also the BWCTL/OWAMP testing do not store 'failed' results.

Thnaks;

-jason

> It has been mentioned before on this list that sometimes bwctl has a
> port contention
> hiccup and no data results for a scheduled test. That is old news.
> And sometimes tests fail because the remote server is down. Such is
> real life.
> But what I've noticed is that the way that the perfSONAR graphing routines
> deal with missing data is pretty strange. I was going to attach a
> picture to
> my post, but I don't know whether I can do that through this list. My
> sample
> is at:
>
> http://noc.ucsc.edu/missingdays.PNG
>
> This plot looks absolutely clean and wonderful -- until you look
> carefully at
> the values along the X-axis and see that four days are missing between Feb
> 11 and Feb 15.
> I have to say that I'm in the habit of flipping quickly through graphs
> and having
> my attention drawn to anomalies. And I don't want the bumps and warts
> hidden in the style of these graphs. The bumps and warts are important
> data.
>
> -jim warner, UCSC