perfSONAR User Q&A and Other Discussion

[Brian Candler <>]

On 01/12/2014 13:05, Aaron Brown wrote:
> That error is usually caused by the clocks being too far offset. How far off 
> are the two hosts from each other time-wise? Is the VM instance running NTP?
If I run "date" on both boxes they seem to be within a second of each other.

The VM is perfsonar running inside VirtualBox inside my laptop. The OSX 
instance is my laptop itself.

On Perfsonar VM:

$ ntpq -p
     remote           refid      st t when poll reach   delay offset  
jitter
==============================================================================
 www.bhay.org    145.238.203.14   2 u   60   64    3    6.003 -1.878   
0.492
*golem.canonical 131.188.3.220    2 u   26   64    1    6.554 0.065   1.296

On OSX:

$ ntpq -p
     remote           refid      st t when poll reach   delay offset  
jitter
==============================================================================
 time.euro.apple 17.72.133.55     2 u 253m  512    1  164.282 6.436 917.154

(hmm, no asterisk, is that in sync? If not, why not?)

Regards,

Brian.