perfSONAR User Q&A and Other Discussion

[Michael Johnson <>]

Hi Brian,

On Thu, Jun 15, 2017 at 09:13:00AM +0000, Brian Candler wrote:
> > > (1) If I set a throughput test to run at 1 hour intervals, it 
> > > seems "jerky". Sometimes the interval between tests is 2 hours; 
> > > sometimes it is only 20 minutes.

I mentioned this privately but wanted to highlight here as well, that the 
graphs are displaying the data points that were collected, which does indeed 
happen at somewhat irregular intervals.

> I think it has changed. If that change was unintentional, it can be 
> changed back.  That, combined with the zooming, would be fine for me.

I'll do some testing and make sure the performance is still acceptable, and 
if so, we can change it back.


> Incidentally, the summary interval is such an important property for 
> interpreting the graph that I think it ought to be displayed somewhere 
> on the page.

Yes, we have an open issue on this -- well, two. First, to display the 
summary window (planned for 4.1):

https://github.com/perfsonar/graphs/issues/90

And another to make it selectable (currently not planned for a particular 
release):
https://github.com/perfsonar/graphs/issues/20

I see how this could be useful, but it's complicated, as different tests may 
have different summary windows available, and choosing the wrong values could 
make things grind to a halt. As there has been little interest, it is frankly 
a relatively low priority.

- Michael

--
Michael Johnson
GlobalNOC Software Engineering
Indiana University

812-856-2771

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