During testing of our configuration of Red Hat Cluster System, NTP stepped the time by 16 seconds, and soon afterwards the cluster software locked up.
ntpd: time reset -16.332117 s
I need to repeat the failure to ensure that it was not just a coincidence. My intention is to get NTP to step the time back repeatedly until either a) I give up or b) the cluster hangs again.
If ntpd uses the same mechanism as /bin/date to set the time, then this is easy. If it uses a different mechanism and I need to trick ntpd to stepping the clock, then I am stuck.
What is the easiest way to do this testing ?