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Questions tagged [time-synchronization]

257 questions
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Best way to synchronise the time on a Windows 2008 Server

I have a small Windows domain (all servers running Windows 2008), with a single Windows 2008 Domain Controller. What is the best way to synchronise the time across all servers with an Internet Time Server?
Daniel McPherson
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How do I re-enable the VM IC Time Synchronization Provider for a Hyper-V client?

We have a Windows domain network with 2 Hyper-V hosts. On these hosts, there are several Hyper-V VM clients. Two of these clients are Domain Controllers. The Hyper-V hosts are both clients of that domain. This brings one to a common time…
Oliver Salzburg
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Increasing time difference between Windows Server 2003 and time.nist.gov even after explicitly syncing time

I have synced the time of my server to time.nist.gov. This server communicates with a client’s server which is also synced with time.nist.gov. After noting that we seemed to be out of sync with the time server even after explicit syncing, I set up…
Abbas
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Windows Server 2008 - inexplicable system time jumps/glitches/inaccuracies

I'm running a production web server on Windows Server 2008. On this server I have a database which logs certain user actions, but every now and again I inexplicably get database entries which, according to the record ID and the records immediately…
Nathan Ridley
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Sync ntp immediately at boot with undiciplined clock

I have setup one ntp server and 5 clients. I want to force sync the clients to server clock on boot. With my current ntp settings the computers are syncing but after several minutes. I cannot wait so long for them to synchronise. I am not using a…
Sap
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Time not propagating to machines on Windows domain

We have a two-domain Active Directory forest: ourcompany.com at the root, and prod.ourcompany.com for production servers. Time is propagating properly through the root domain, but servers in the child domain are unable to sync via NTP. So the time…
Richard Beier
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Compute Engine VM clock runs fast and gains 15 seconds per hour (or about 1 second per each 4 minutes)

I have a 2 vm instances in GCE that do not keep correct time in spite of the server OS being set to sync with NTP every 24 hours. The OS clock gains about 1 second of time every four minutes (or about 15 seconds each hour). One vm instance machine…
Ricky
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Domain Controller time is 7 minutes fast

I have a Server 2008 R2 domain controller running in VM on Hyper-V that is 7 minutes fast which I need to fix. I understand that this maybe down to the DC running in VM's. What I would like to know is how I can correct it? I believe I can setup…
stead1984
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How do I tell if chronyd is actually self-synchronising correctly?

I'm working on some devices where I want them to self-synchronise while their network connection is down (i.e. use chrony's calculations of drift rates to compensate for system clock drift), and then sync normally when remote connectivity is…
ncoghlan
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How to prevent relative time shift after restoring a snapshot in Parallels?

I am working with a web-based app on an Ubuntu test/development system running in Parallels. At specific dates and times (taken from the system time) some events happen and things are changed in the database. (e.g., a user account is locked, if…
Stefan Winkler
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Find windows process that is changing time back 1 hour

I have a windows machine which will periodically change the system time, for reasons unknown. It appears to happen every hour. This windows machine is a virtual machine (Parallels Desktop 9, Win7 guest, OSX host). It has an NTP service (NetTime)…
Ian
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FreeBSD: how to syncronize the system clock with the hardware clock in bash?

I am writing a script that synchronizes the system clock with the hardware clock (aka RTC, or CMOS clock) assuming that no Network Time Protocol (NTP) daemon is running. I am running in a virtual machine and the supervisor doesn't let the hardware…
Lilás
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Measuring system clock (time) of a remote server

What are the network protocols that can be used to measure the system clock (time) of a remote server? So far I have: Query with NTP TCP Timestamps HTTP headers Are there any other?
vy32
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NTP using GPS and PPS as clock, PPS is marked as falseticker

I am attempting to add a GPS-based clock source to my network, using a GPS which emits a 1-PPS clock pulse. This is connected to a GPIO pin. After allowing ntpd to run for 30 minutes or so, the PPS clock is still not used, and marked as bad, but I…
Michael Graff
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Wrong time on Domain Controller running as guest on Hyper-V

As stated in the headline our Domain Controller runs on Windows Server. This server is a Hyper-V Guest. The Hyper-V Host is joined to the Domain. Unfortunately the Time on the Domain Controller is off by a couple of minutes. As a result all clients…
Thorsten Niehues
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