Interesting. I'm thinking there's something else off there. Perhaps the hypervisor is incredibly oversubscribed?
On Mon, Feb 17, 2020 at 04:12:59PM -0600, Hunter Fuller wrote: > I wouldn't say we need it to be "really precise," but we do need it > within a couple of seconds, and on ESXi 6 we were seeing boxes as far > as 500ms off. It may not apply to all VM environments, so I guess it > could be worth testing. But it certainly scared me off. With physical > NTP servers we achieve within 10ms generally. > > On Mon, Feb 17, 2020 at 4:09 PM Alex Balashov <abalas...@evaristesys.com> > wrote: > > > > On Mon, Feb 17, 2020 at 04:00:25PM -0600, Hunter Fuller wrote: > > > > > On Mon, Feb 17, 2020 at 3:57 PM Mike Hammett <voice...@ics-il.net> > > > wrote: > > > > Is having four VMs running NTP a ridiculous proposition (well, other > > > > than resources, which it'll consume very little)? > > > > > > Yes. NTP servers should never run in VMs. > > > > I don't know about that. The nature of virtualisation has changed > > greatly over the past decade; VMs have gone from being a kludgy and slow > > software-emulated environment to almost a first-class CPU guest, thanks > > to paravirtualisation and supporting CPU features. > > > > And NTP is specifically designed for latency in a rather general sense. > > > > If you're using NTP for any really precise timing calibration, that's > > the wrong vehicle, anyway. > > > > -- Alex > > > > -- > > Alex Balashov | Principal | Evariste Systems LLC > > > > Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) > > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > > _______________________________________________ > > VoiceOps mailing list > > VoiceOps@voiceops.org > > https://puck.nether.net/mailman/listinfo/voiceops -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ VoiceOps mailing list VoiceOps@voiceops.org https://puck.nether.net/mailman/listinfo/voiceops