The degree of drift is unusual... one might suspect hardware (warning h/w clueless... could the crystal wear out?) weird, but it should be noted that PC clocks are often terrible, I had one that would absolutely lose 20 minutes a day, and it was fine with NTP, because ntp does not sync. it adjusts the rate of clock ticking. so just running ntp for long enough will calibrate your clock (not sure if it will correct it at bios level, but at least while running will not drift so badly.)
On Tue, Aug 17, 2010 at 12:00 PM, Jeremy <[email protected]> wrote: > On 08/17/2010 11:53 AM, Stefan Monnier wrote: > >> so, why has it just happened recently. I do know about ntp and ntpdate, > >> but since I don't need exact time all the time, the occasional ntpdate > >> has always been fine. > >> > > All workstations I've ever used back when I was a student had an ntpd > > running, as a matter of course. > > Nowadays, I have it running on my cell-phone, my home routers, ... > > Why someone wouldn't want to run it on a machine that runs several VMs > > is beyond me. > > > > This said, 20 minutes over the weekend is *a lot*, so it may be due to > > a real problem, and ntpd may not be able to adjust for it (it's not > > designed for such big discrepancies). > > > > > > Stefan > > > Never really had much of a problem, but it is kind of strange it is not > installed on ubuntu by default (nor on debian stable afaics). Back in > gentoo days it was one of the first things I would install, logger, > dhcp, cron, and ntp. > > It was an hour over the weekend, which is what surprised me. 20 minutes > or so just from 9PM last night to 9AM this morning. > > The VMs are mostly idling as well, only one working "hard" doing remote > rsync backups (backuppc), and that is hard i/o, not CPU. > > Jeremy > > _______________________________________________ > mlug mailing list > [email protected] > https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca >
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