Time Drift

My CentOS guest's time was constantly running ahead of the host server's actual time.

Time drift issues are common when working with virtualization.  I found a good article about Hyper-V time synchronization issues at Ben Armstrong's Blog at http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/11/19/time-synchronization-in-hyper-v.aspx.

I was able to resolve the issue by installing the NTP service:

           yum install ntp

The default NTP servers were OK but they can be changed with:

           vi /etc/ntp.conf
The following commands then started the service, synced the guest, and set the NTP service to start automatically.

          service ntpd start
          netpd -q

          hwclock --systohc
          chkconfig ntpd on

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