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In Microsoft Windows XP, the Windows Time service automatically synchronizes your computer’s internal clock with other clocks in the network. The time source for this synchronization varies, depending on whether the computer is joined to an Active Directory domain or to a workgroup.”
Today, It seemed all of my workstations on my network were behind a few minutes. After some digging, I found some of my Virtual Domain Controller’s where behind as well. Hmm, I checked the following settings.
I then did some research, to refresh my mind on the way’s to sync time.
Timekeeping in VMware Virtual Machines
This is a great complete guide.
Timekeeping best practices for Windows
KB Article: 1318
“This article presents best practices for achieving accurate timekeeping in Windows Guest operating systems. These recommendations include a suggested configuration for time synchronization in the guest and on the host.”
Timekeeping best practices for Linux guests
KB Article: 1006427
“This article presents best practices for Linux timekeeping. These recommendations include specifics on the particular kernel command line options to use for the Linux operating system of interest. There is also a description of the recommended settings and usage for NTP time sync, configuration of VMware Tools time synchronization, and Virtual Hardware Clock configuration, to achieve best timekeeping results.“
I also found the following:
Time in virtual machine drifts due to hardware timer drift
KB Article: 1006072
Time Synchronization in Guests Deployed from OVF Template
KB Article: 1014038
Troubleshooting timekeeping issues in Linux guest operating systems
KB Article: 1011771
Time in a Linux 2.6 guest operating system runs faster than real time due to lost tick overcompensation
KB Article: 1006113
KB Article: 1189
And the following for configuration:
Follow your Documentation guides at http://www.vmware.com/support/pubs/ Or Here for vSphere.
Installing and Configuring NTP on an ESX host
KB Article: 1339
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This article provides steps to install and configure NTP on an ESX 2.x and 3.0.x host.”
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The vicfg-ntp command supports specifying the NTP (Network Time Protocol) server for an ESX/ESXi host. Some protocols, such as Kerberos, must have accurate information about the current time”
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In my case, I had not changed my NTP server, after I moved.
So then , how do you update your clocks on your workstations?
How to synchronize the time with the Windows Time service in Windows XP
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This article describes how to synchronize the time on your computers by using the Windows Time Service.
In Microsoft Windows XP, the Windows Time service automatically synchronizes your computer’s internal clock with other clocks in the network. The time source for this synchronization varies, depending on whether the computer is joined to an Active Directory domain or to a workgroup.”
That seemed to fix any workstations that didn’t automatically update, or if someone didn’t want to wait for it to auto update.
Roger L.
