On 18.11.14 22:50, Mathew Snyder wrote: > [...] This poses a few concerns such as: How will a Vmotion affect > the service?
We sync the ESXi hosts themselves and all VMs (various CentOS 6.x, CentOS 7, OpenBSD 5.x, some Windows) to a set of internal Stratum-2 servers that in turn sync to some Stratum-1 servers on the 'net. ntpdate turned out to be unnecessary, synchronization on startup is very quick if "iburst" is used in ntp.conf . So they run just ntpd and are nicely synced with millisecond precision -- unless a VM gets VMotioned which makes it lose a few clock ticks. Of course NTP soon gets a grip on it but resynchronization takes some minutes. > We likely won't get approval for hardware to host NTP >From the above you see why I would recommend against running your Stratum servers on VMs. Maybe you have the chance to use some Cisco or Juniper? Re-commission an old one? If you can get approval for a Raspberry Pi have a look here: http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html Ciao, Lobo _______________________________________________ Tech mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
