Comments on: Time Is Marching On… Disabling TimeSync, Completely. http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/ How Many Turtles Can You Fit On A Rock? Sat, 31 Jul 2010 19:59:12 -0500 http://wordpress.org/?v=2.9.2 hourly 1 By: Liens du jour #5 - Hypervisor.fr http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-1345 Liens du jour #5 - Hypervisor.fr Sat, 24 Apr 2010 23:52:56 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-1345 [...] the esxcfg-auth –usecrack command to set password complexity Change VUM Download Directory Disabling Time Synchronization VMware tools time sync can’t slowing down time Windows Server 2008 Enterprise/Datacenter SAN [...] [...] the esxcfg-auth –usecrack command to set password complexity Change VUM Download Directory Disabling Time Synchronization VMware tools time sync can’t slowing down time Windows Server 2008 Enterprise/Datacenter SAN [...]

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]]> By: professionalvmware http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-904 professionalvmware Wed, 07 Oct 2009 01:35:29 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-904 I agree with the second post here:<br><a href="http://communities.vmware.com/thread/221235" rel="nofollow">http://communities.vmware.com/thread/221235</a><br><br>In summary:<br><br> - ESX hosts and vCenter sync to an external source<br> - virtual domain controllers sync to host or external source<br> - domain-joined vms sync to DCs via normal Windows methods<br><br>-C I agree with the second post here:
http://communities.vmware.com/thread/221235

In summary:

– ESX hosts and vCenter sync to an external source
– virtual domain controllers sync to host or external source
– domain-joined vms sync to DCs via normal Windows methods

-C

]]> By: Tom http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-903 Tom Wed, 07 Oct 2009 01:11:55 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-903 How does one decide how critical time is??<br>All our hosts are set to ignore the Windows time service and get their time from the ESX host, which gets its time from our external physical server (DNS, NTP, etc.), which itself looks to <a href="http://pool.ntp.org" rel="nofollow">pool.ntp.org</a>.<br>We don't do anything that requires sub-second precision, so how do we decide where time should sync from??<br>Our ESX hosts don't have Internet-accessible addresses.<br>Thank you, Tom How does one decide how critical time is??
All our hosts are set to ignore the Windows time service and get their time from the ESX host, which gets its time from our external physical server (DNS, NTP, etc.), which itself looks to pool.ntp.org.
We don't do anything that requires sub-second precision, so how do we decide where time should sync from??
Our ESX hosts don't have Internet-accessible addresses.
Thank you, Tom

]]> By: professionalvmware http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-902 professionalvmware Tue, 06 Oct 2009 21:57:01 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-902 From KB *1006427*<br>"NTP Recommendations *Note*: In all cases use NTP instead of VMware Tools<br>periodic time synchronization. Also, you may need to open the firewall (UDP<br>123) to allow NTP traffic."<br><br>In some situations, such as a VM moving from one host to another, or<br>resuming from snapshot, the VMware tools will force a sync of time. The<br>period of time between this time sync and the next update from NTP may be<br>otherwise unacceptable in some environments.<br><br>-C From KB *1006427*
“NTP Recommendations *Note*: In all cases use NTP instead of VMware Tools
periodic time synchronization. Also, you may need to open the firewall (UDP
123) to allow NTP traffic.”

In some situations, such as a VM moving from one host to another, or
resuming from snapshot, the VMware tools will force a sync of time. The
period of time between this time sync and the next update from NTP may be
otherwise unacceptable in some environments.

-C

]]> By: jeckhart http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-901 jeckhart Tue, 06 Oct 2009 21:40:46 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-901 Under what situations would I want to disable TimeSync? Under what situations would I want to disable TimeSync?

]]> By: professionalvmware http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-709 professionalvmware Tue, 06 Oct 2009 20:35:29 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-709 I agree with the second post here:<br><a href="http://communities.vmware.com/thread/221235" rel="nofollow">http://communities.vmware.com/thread/221235</a><br><br>In summary:<br><br> - ESX hosts and vCenter sync to an external source<br> - virtual domain controllers sync to host or external source<br> - domain-joined vms sync to DCs via normal Windows methods<br><br>-C I agree with the second post here:
http://communities.vmware.com/thread/221235

In summary:

– ESX hosts and vCenter sync to an external source
– virtual domain controllers sync to host or external source
– domain-joined vms sync to DCs via normal Windows methods

-C

]]> By: Tom http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-708 Tom Tue, 06 Oct 2009 20:11:55 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-708 How does one decide how critical time is??<br>All our hosts are set to ignore the Windows time service and get their time from the ESX host, which gets its time from our external physical server (DNS, NTP, etc.), which itself looks to <a href="http://pool.ntp.org" rel="nofollow">pool.ntp.org</a>.<br>We don't do anything that requires sub-second precision, so how do we decide where time should sync from??<br>Our ESX hosts don't have Internet-accessible addresses.<br>Thank you, Tom How does one decide how critical time is??
All our hosts are set to ignore the Windows time service and get their time from the ESX host, which gets its time from our external physical server (DNS, NTP, etc.), which itself looks to pool.ntp.org.
We don't do anything that requires sub-second precision, so how do we decide where time should sync from??
Our ESX hosts don't have Internet-accessible addresses.
Thank you, Tom

]]> By: Tweets that mention Time Is Marching On… Disabling TimeSync, Completely. -- Topsy.com http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-707 Tweets that mention Time Is Marching On… Disabling TimeSync, Completely. -- Topsy.com Tue, 06 Oct 2009 19:36:12 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-707 [...] This post was mentioned on Twitter by cody_bunch and Grant Burns. Grant Burns said: How to fully disable #VMware guest time sync. http://bit.ly/pVSBl [...] [...] This post was mentioned on Twitter by cody_bunch and Grant Burns. Grant Burns said: How to fully disable #VMware guest time sync. http://bit.ly/pVSBl [...]

]]> By: professionalvmware http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/comment-page-1/#comment-706 professionalvmware Tue, 06 Oct 2009 16:57:01 +0000 http://professionalvmware.com/2009/10/time-is-marching-on-disabling-timesync-completely/#comment-706 From KB *1006427*<br>"NTP Recommendations *Note*: In all cases use NTP instead of VMware Tools<br>periodic time synchronization. Also, you may need to open the firewall (UDP<br>123) to allow NTP traffic."<br><br>In some situations, such as a VM moving from one host to another, or<br>resuming from snapshot, the VMware tools will force a sync of time. The<br>period of time between this time sync and the next update from NTP may be<br>otherwise unacceptable in some environments.<br><br>-C From KB *1006427*
“NTP Recommendations *Note*: In all cases use NTP instead of VMware Tools
periodic time synchronization. Also, you may need to open the firewall (UDP
123) to allow NTP traffic.”

In some situations, such as a VM moving from one host to another, or
resuming from snapshot, the VMware tools will force a sync of time. The
period of time between this time sync and the next update from NTP may be
otherwise unacceptable in some environments.

-C

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