Hello Supun, Thank you Supun for your advice. I have started implementing what you described in your email, and I guess this "Central Time Authority approach" is the only way to go.
Thank you all for your input, Nick 2015-04-23 12:16 GMT-04:00 Supun Kamburugamuva <[email protected]>: > From our experience, no matter how much we tried, we cannot get an > accurate time measurements across different machines. NTP can only make the > clocks synchronize up to some level and even if the clocks are synced they > drift again very quickly. If you really want to measure the time across > machines I guess one method is to send a message with a timestamp, get a > response with the same time-stamp and get the difference. > > Thanks, > Supun.. > > On Thu, Apr 23, 2015 at 10:45 AM, Nick R. Katsipoulakis < > [email protected]> wrote: > >> Hello Jeremy, >> >> I have the same fears on using nano-time. >> >> Cheers, >> Nick >> >> 2015-04-23 10:29 GMT-04:00 Jeremy Heiler <[email protected]>: >> >>> On Wed, Apr 22, 2015 at 3:18 PM, Sushant Kumar <[email protected]> >>> wrote: >>> > >>> > look at >>> http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/System.html#nanoTime%28%29 >>> . >>> >>> I'd be wry of using nanoTime() across systems. I don't think there's any >>> guarantee of consistency. >>> >> >> >> >> -- >> Nikolaos Romanos Katsipoulakis, >> University of Pittsburgh, PhD candidate >> > > > > -- > Supun Kamburugamuva > Member, Apache Software Foundation; http://www.apache.org > E-mail: [email protected]; Mobile: +1 812 369 6762 > Blog: http://supunk.blogspot.com > > -- Nikolaos Romanos Katsipoulakis, University of Pittsburgh, PhD candidate
