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тАО04-27-2010 11:31 AM
тАО04-27-2010 11:31 AM
I have a problem with the operating system clock. the clock is delayed 15 minutes in a period of 2 months. then I set the clock again and repeat the problem.
Any body know what is the problem?
Solved! Go to Solution.
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тАО04-27-2010 11:41 AM
тАО04-27-2010 11:41 AM
SolutionFifteen seconds a day is a fairly large amount. Server clocks are not noted for accuracy and a 1-2 seconds drift a day isn't that uncommon depending on the operating environment.
That said, you need to be running NTP (Network Time Protocol) to synchronize your server's time to an accurate source.
For setup, see:
http://docs.hp.com/en/B2355-90774/ch04.html
For connectivity to free, public, accurate timesources (configure at least three) see:
http://www.pool.ntp.org/en/
Regards!
...JRF...
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тАО04-27-2010 12:38 PM
тАО04-27-2010 12:38 PM
Re: System Clock
Computer clocks can't tell time.
There is this nifty tool called ntp, which lets you sync your system to a time source. Its already in your 11.23 system.
See /etc/rc.config.d/netdaemons check the xntp settings.
Find a valid time source from your network administrator and this problem will never return.
Note: ntp adjusts to about 16 minutes. Beyond that a manual change will be required to get the system back into that range.
SEP
Owner of ISN Corporation
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http://hpuxconsulting.com
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тАО04-27-2010 01:52 PM
тАО04-27-2010 01:52 PM
Re: System Clock
This is a production server and the part that I do not understand is all the minutes he has of the other servers carrier delays on other servers only 2 or 3 minutes past due.
1 would have to review some hardware
2 the problem is operating system-level
There will be some other way to solve the problem and that this solution does not use the NTP service.
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тАО04-27-2010 03:52 PM
тАО04-27-2010 03:52 PM
Re: System Clock
However, NTP is by far the best solution to keeping time in sync on all servers.
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тАО04-27-2010 04:52 PM
тАО04-27-2010 04:52 PM
Re: System Clock
As already noted, when someone wants to keep time "in sync" "the" way to do so is to use NTP. The idea is you would point three or more of your systems at willing NTP servers "on the net." Those systems will then be the "root" of your local time tree. You would then point your other servers at those three servers.
Why three? The NTP code has logic in it to separate "good" from "bad" timesources, and it needs/wants at least three timesources to be able to do that.
There will likely be much more in the way of details on www.ntp.org and/or in the HP-UX sysadmin manuals.
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тАО04-27-2010 05:53 PM
тАО04-27-2010 05:53 PM
Re: System Clock
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тАО04-27-2010 07:24 PM
тАО04-27-2010 07:24 PM
Re: System Clock
this indicate it should have NTP.
what does ntpq -p says.
if you have ntp make sure your source should be running fine, cause you may beat the bush around all the other servers.
Else check the battery on the affected server.
BR,
Kapil+