On Wed, Jan 2, 2013 at 3:53 AM, Robert Dinse <nanook at eskimo.com> wrote: > > Friday, I moved our servers to a new co-lo facility and ran into an > interesting problem with virtual machines. > > I did an orderly shutdown of the CentOS 6.3 host, and it in turn suspends > all the guests. It took about an hour and a half to move and fire up the host. Suspends? Or shuts down? There's a big difference, and I don't think you'd have seen this problem with the gu4ests shutdown. > The guests, being suspended, were then an hour and a half behind and it > seems ntpd does not want to correct more than 1000 seconds of error so it would > not automatically adjust the clocks. ntpd is sometimes too smart for its own good. However, "rdate -s time.mit.edu" or other rdate server works very well and doesn't have the problems with not being able to run "ntpdate" while the ntpd is running.