This paper that improves clock synchronization accuracy to tens of nanoseconds is amazing work. What changes with that level of accuracy? Like the paper says, Spanner commit times get a lot shorter. But is it now safe to take action without coordination? https://www.usenix.org/system/files/conference/nsdi18/nsdi18-geng.pdf …
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It is not straightforward to coordinate with precise time. You still need tight bounds on message delivery times. Faults also complicate silent-consent coordination. I wrote an NSF project proposal on the subject, and am eager to delve into this. http://muratbuffalo.blogspot.com/2019/12/i-am-looking-for-phd-students.html …
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Can’t tight clock sync can be used to bound delivery times, by failing to deliver everything that arrives after a timeout?
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