On Jan 22, 2013, at 8:16 PM, Matt Garman wrote:
Hi,
We have a little over 100 servers, almost all running CentOS 5.7. Virtually all are Dell servers, generally a mix of 1950s, R610s, and R410s.
We use NTP and/or PTP to sync their clocks. One phenomenon we've noticed is that (1) on reboot, the clocks are all greatly out of sync, and (2) if the PTP or NTP process is stopped, the clocks start drifting very quickly.
If it was isolated to one or two servers, I'd dismiss the issue. I also had this problem under CentOS 4.
I suspect something is mis-configured, because I can't imagine the hardware clock on ALL these servers is *that* bad.
Anyone else dealt with anything similar?
---- pretty much everyone deals with this issue in one way or another.
You don't actually show us your ntp.conf but generally, I would recommend that you make this the very first line of ntp.conf: tinker panic 0
Craig