Hi. I believe XEN (and other vps) servers can be used as NTP servers (with stratum 2 or higher), as long as you know what you are doing :-).
That means: - selecting a sensible clocksource (xen should do ok for you) - unbinding clock on VPS from clock on hardware node (can't be done on some (para)virtualization platforms) - carefully monitoring time accuracy to see, if it is acceptable for production use I have a XEN NTP server with offsets usually within +- 100 us, which i believe is perfectly fine for pool usage. Some reading I found interesting: Virtualize Everything but Time http://static.usenix.org/event/osdi10/tech/full_papers/Broomhead.pdf Timekeeping in VMware Virtual Machines http://www.vmware.com/files/pdf/Timekeeping-In-VirtualMachines.pdf If you have any questions about XEN setup, just let me know. Matej Snoha On Wed, May 30, 2012 at 12:53 PM, IT2GO <[email protected]> wrote: > Dear, > > At the moment I run about 15 NTP servers around the world. 12 of them are > hosted on a XEN vps'es, 3 on dedicated servers. > Some time ago, someone told me that it isn't allowed to run NTP on a VPS. > Is this true or not? May i continue to set up NTP servers on my VPS'es or > only on dedicated servers? > > PS : all my vps'es runs on a XEN node, with openVZ virtualisation it isn't > possible to start a NTP server. > > > ______________________________**_________________ > pool mailing list > [email protected] > http://lists.ntp.org/listinfo/**pool <http://lists.ntp.org/listinfo/pool> >
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