perfSONAR User Q&A and Other Discussion

[Kathy Benninger <>]

Hi Andy,

Load/usage numbers are typically low on the pSs. Unfortunately I didn't 
think to check at the time when tests were failing.

Scheduled testing has been running as expected since I rebooted all the pSs 
yesterday. As you note, >48 hours has passed for all pSs that had problems 
with testing. Now that you've reminded me to look for pscheduler test 
results, I will do that as soon as I notice if problems occur again.

Thanks,
Kathy


On 9/22/2017 10:09 AM, Andrew Lake wrote:
> Hi Kathy,
>
> Does the box have high load and/or CPU usage numbers in top? or did it when 
> the tests were failing? That could potentially account for some tests not 
> appearing and the GUI seeming slow. Looks like maybe we are out of the 48 
> hour window that pscheduler keeps test results around so I can’t dig into 
> the pscheduler API to see the failed tests unfortunately.
>
> Thanks,
> Andy
>
>
> On September 21, 2017 at 4:02:44 PM, Kathy Benninger ( 
> <mailto:>) wrote:
>
> > I am seeing inconsistencies with perfSONAR Test Results Display on a few of
> > the pSs in a mesh that I manage. I first noticed the problem earlier this 
> > week.
> >
> > There was also an issue where some of the pSs stopped initiating scheduled
> > tests last Friday ~5pmET. This latter issue seems to have been resolved with
> > a restart of pscheduler services or a reboot. I don't know that the display
> > and testing problems are in any way related, but I mention both in case
> > there is some known correlation.
> >
> > Regarding the ongoing Test Results Display issue:
> >
> > 1) The "Test Results Overlay" stats box does not appear for some tests
> > 2) Response to mouse interaction for these tests is limited and very slow
> > (on the order of 20 seconds or more)
> >
> > Example at:
> > http://ps.iu.xsede.org/toolkit/
> >
> > The display for test results with ps.nics.utk.edu <http://ps.nics.utk.edu> 
> > looks OK.
> >
> > The display for test results with ps.psc.xsede.org 
> > <http://ps.psc.xsede.org> demonstrates
> > the problem.
> >
> > I rebooted to fully update all pSs, which are now running:
> > CentOS Linux 2.6.32-696.10.2.el6.x86_64
> > perfSONAR Toolkit v4.0.1-1.el6
> >
> > I'm looked for guidance on what error messages to look for or how to go
> > about diagnosing this problem.
> >
> > Thanks!
> > Kathy
> >
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > Kathy Benninger
> > Pittsburgh Supercomputing Center