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Too obvious, something more tricky probably... ablack 2006-05-12 12:10:04 UTC #7 Alain Williams: It is an irritation more than anything else ... Quote: Originally Posted by UltraSoul I also worry that whether hw clock modification will cause oracle service down if I make hw clock 5 second quickly. Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us.

The -g and -x options can be used with this option. The kernel option tells kernel what timer source to use to timekeeping. Log Out Select Your Language English español Deutsch italiano 한국어 français 日本語 português 中文 (中国) русский Customer Portal Products & Services Tools Security Community Infrastructure and Management Cloud Computing Storage JBoss Are all the VMs on the machine running ntp actually fighting each other?

rkay 2006-10-25 15:29:07 UTC #13 Correcting time is the job ntpd is supposed to do. You need both measures. When it comes to time on your network there should be only one truth. I want to try to add the following boot options for preventing clock running slowly and quickly.

Perhaps my ticks just are not happening fast enough giving the illusion that the clock is running slow. EvenSt-ring C ode - g ol!f more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life On my laptop it was not and I found that by looking at the info displayed during shutdown. If not, what should I do For example, restart ntpd service after [OS=>HW_Clock] sync.

Also on your PDC make sure your firewall allows UDP port 123 to reach the server. [/Edit]

[Edit2] Here is another reference where they say to use the pit clock source You may have to do some testing to ensure you don't make asterisk unstable. UltraSoul View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by UltraSoul 01-01-2009, 09:18 PM #2 JeffSilverman LQ Newbie Registered: May 2007 Location: Virtual Machines have problems with their time because there isn't a proper hardware timing signal coming in.

Nov  1 04:07:17 pbx ntpd[1272]: frequency error 1378 PPM exceeds tolerance 500 PPM Nov  1 04:15:48 pbx ntpd[1272]: frequency error 822 PPM exceeds tolerance 500 PPM Nov  1 04:17:57 pbx ntpd[1272]: I got the error in the last two weeks and occured again today. Is there any job that can't be automated? I wonder what the meaning of clock=pit is?

Product(s) Red Hat Enterprise Linux Component ntp Category Troubleshoot Tags rhel rhel_4 rhel_5 rhel_6 This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that I'll bet that it's failing to upate the clocks properly. Jan 1 22:01:12 RHEL4-001 ntpd[3066]: frequency error -504 PPM exceeds tolerance 500 PPM. .... for more details.

So here's the latest snipit from that file-The errors still exist but have the PPM is smaller and the amount of tolerance errors has lessened. I can't seem to find any good information about this error, except that is has something to do with the hardware clock being too far behind the ntp clock, which is Registration is quick, simple and absolutely free. This is your problem: > Oct 19 17:19:09 srv3 ntpd[19356]: frequency initialized 500.000 from > /var/lib/ntp/drift > Oct 20 15:37:13 srv3 ntpd[20655]: frequency initialized 500.000 PPM from > /var/lib/ntp/drift > Oct

Does chilli get milder with cooking? tlundqvist 2006-10-24 17:28:53 UTC #11 Peter Collinson: The clock on my VM is drifting wildly - such that ntp is forcing periodic time resets. If you don't have a linux box running on a real hardware then I would do this: Configure your PDC and BDC (yes I know old terms but easy to type) You should also make sure that the ntp servers you are syncing with are relatively close.

Good thinking. Open Source Communities Subscriptions Downloads Support Cases Account Back Log In Register Red Hat Account Number: Account Details Newsletter and Contact Preferences User Management Account Maintenance My Profile Notifications Help Log more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Should I be running ntp - isn't it possible that my reference clock differs from that used on the virtual machine host - or on some other VM?

Perhaps my ticks just are not happening fast enough giving the illusion that the clock is running slow. If I have a copy of the system's clock settings, then presumably the host system is making my clock tick - is there enough CPU power to make everyone's clock tick Diagnostic Steps Further steps to debug the issue: If multiple systems are affected by the issue: Do affected and not affected systems use a common NTP server as source? > Forums > Linux Forums > Linux - Software ntpd frequency error User Name Remember Me?

We Acted. Digital Diversity Removing elements from an array that are in another array How to select edge rings between two edges? I would guess that ticks from the host are lost sometimes, maybe when the load is high? awilliams 2006-05-12 11:06:39 UTC #6 It is an irritation more than anything else ...

About Advertising Privacy Terms Help Sitemap × Join millions of IT pros like you Log in to Spiceworks Reset community password Agree to Terms of Service Connect with Or Sign up As well you could check which timer source is your kernel using and possibly force another one. all these messages in my log files is why I would really like to work out what it is all about. My drift file gets to 512 and stops there. 512 seems a mysterious power of two to me.

I would recommend you stick to hardware implementations. I have the same problem. asked 4 years ago viewed 7526 times active 4 years ago Related 39Do I need to run ntpd in my EC2 instance?9Where can I look up for the ntpd log?4Does NTPd The timesource can be changed, different timesources could be more reliable in the system.

Text Quote Post |Replace Attachment Add link Text to display: Where should this link go? Maurits van Rees dewart 2006-05-02 19:47:25 UTC #5 I think this is an 'expected' error on VMs: I don't think it's harmful and it generally doesn't seem to stop the VM So I ended up setting the hwclock option --directisa. If I have a copy of the system's clock settings, then presumably the host system is making my clock tick - is there enough CPU power to make everyone's clock tick

It has some kernel changes regarding the timing. I'll save you the math but this works out to about 3.15 seconds per 15 minutes + ntp overhead.The solution is simple:  Check you're running  BIOS:      version 1.0.19  kickstart: version 5.0(4)  PPMが出たらまず試したいこと。 Linux ntp ntpd 先日突然/var/log/messagesに ntpd[xxxx]: frequency error 1028 PPM exceeds tolerance 500 PPM みたいな感じのメッセージが出力されるようになったときの対応メモ。 そもそもこのメッセージの意味は? ntpd[xxxx]: frequency error 1028 PPM exceeds tolerance 500 PPM 行頭から順番に見ていこう。 ntpdとあるので、どうやら時刻合わせのデーモンに何事かあったらしい。 frequency errorとあるので、「周波数誤差」があるよということらしい。 frequency errorの意味