[email protected] writes: > Hi, > > I am looking to implement an NTP network and I was reading > http://support.ntp .org/bin/view/Support/DesigningYourNTPNetwork. It > suggests 4 stratum 1 peers and 4 stratum 2 peers well. I understand, > that the document recommends this so that if one of the servers in a > stratum dies, there will still be 3 servers from which a majority > clique should be found. The problem is that we will be starting out > with simply 100 nodes at most. > > At the same time, we want drift less than 1 second. However, over the > next 7 years or so, we should hit ~ 1000 NTP clients. Is the > document's recommendation overkill for my situation?
"It depends." What (and who) will it cost if this design/deployment goes wrong? What will it cost if your machines drift away more than a second? Do you need to keep good time even if no external timesources are available? If so, for how long? How well-synch'd do your clients need to be with each other? You can get a decent S1 source for not a lot of money. It won't keep decent time for long if no external sync source is available. You can do much better if you start spending more (maybe US$3,000 or so). You can do better than that if you spend even more. In 7 years' time it might be much better to be ready for PTP as well. You have a lot of choices. What you should buy really depends on what your actual requirements are (and those requirements might cover a fairly wide area). Please let me know if I can help more. -- Harlan Stenn <[email protected]> http://networktimefoundation.org - be a member! _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
