perfSONAR User Q&A and Other Discussion

[Trey Dockendorf <>]

I just discovered my bandwidth testing host is failing to run some of the configured tests.  I'm seeing errors like this in /var/log/perfsonar/regular_testing.log

2015/08/03 11:57:35 (21746) ERROR> MeasurementArchiveChild.pm:125 perfSONAR_PS::RegularTesting::Master::MeasurementArchiveChild::__ANON__ - Problem handling test results: Problem storing results: Error writing metadata: Error running test to psonar3.fnal.gov  with output bwctl: star

t_endpoint: 3634164453.980392

Attached is my regular_testing.log

The system: http://psonar-bwctl.brazos.tamu.edu/toolkit/gui/services/

The tests I was hoping to look at were against psonar3.fnal.gov.  I've noticed other tests are missing data too like tests to tx-learn.net hosts.  Tests to psnr-bw01.slac.stanford.edu is one that shows data but with lots of "red dots" at the top of the graphs.

I saw some mention of NTP problems in the logs so I forced NTP server updates via interface hoping to get closer NTP servers used.

# ntpq -p -c rv

     remote           refid      st t when poll reach   delay   offset  jitter

==============================================================================

-nms-rlat.chic.n 141.142.143.138  2 u   11   64  377   24.055   -3.209   0.407

*nms-rlat.hous.n .IRIG.           1 u    6   64  377   18.186    1.227   0.230

-nms-rlat.salt.n 128.138.140.44   2 u   65   64  377   33.024   -4.304   0.435

+time2.chpc.utah 198.60.22.240    2 u    8   64  377   34.591   -2.486   0.335

+time3.chpc.utah 198.60.22.240    2 u    2   64  377   34.534   -2.771   0.219

associd=0 status=0615 leap_none, sync_ntp, 1 event, clock_sync,

version="ntpd Mon Mar 16 14:53:03 UTC 2015 (1)",

processor="x86_64", system="Linux/2.6.32-504.30.3.el6.web100.x86_64",

leap=00, stratum=2, precision=-24, rootdelay=18.186, rootdisp=18.007,

refid=64.57.16.162,

reftime=d96a2001.60695f02  Mon, Aug  3 2015 12:14:41.376,

clock=d96a2090.760490a5  Mon, Aug  3 2015 12:17:04.461, peer=21380, tc=6,

mintc=3, offset=-0.105, frequency=41.314, sys_jitter=2.330,

clk_jitter=1.141, clk_wander=0.151

# ntpstat

synchronised to NTP server (64.57.16.162) at stratum 2

   time correct to within 27 ms

   polling server every 64 s

Let me know what other information would be useful to debug this.

Thanks,

- Trey

=============================

Trey Dockendorf 

Systems Analyst I 

Texas A&M University 

Academy for Advanced Telecommunications and Learning Technologies 

Phone: (979)458-2396 

Email:  

Jabber:

Attachment: regular_testing.log
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