是时候了！利用 Amazon Time Sync 改进分布式系统.pdf

1、 2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.C M P 4 0 9Its About Time!Improving Distributed Systems with Amazon Time SyncJosh Levinson(he/him)Principal Product Manager,EC2Amazon Web ServicesJulien Ridoux(he/hi

2、m)Principal Software EngineerAmazon Web ServicesNikolai Larbalestier(he/him)SVP Cloud Strategy and Enterprise ArchitectureNasdaq 2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.Agenda1.What is a clock?2.Making a good clock 3.Using a good clock-Nasdaq4.Leveraging good clocks global

3、ly 2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.“Synchronized clocks are interesting because they can be used to improve performance of a distributed system by reducing communication.”Barbara LiskovPractical Uses of Synchronized Clocks in Distributed Systems 2025,Amazon Web Ser

4、vices,Inc.or its affiliates.All rights reserved.What are computer clocks used for?Human ObservabilityCommon ScaleAuditingDistributed Systems?2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.AWS Advances in Clock Sync1.What is a clock?2.3.4.2025,Amazon Web Services,Inc.or its affili

5、ates.All rights reserved.9 8 7Something that“ticks”periodicallySomething that countsHow to build a computer clockC(t)=N(t)/frequency+K6 5 4 3 2 1 0Clock at perfect time tCounterat tTicks per secondTime when counter was 0N=2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.Oscillators

6、 get expensive quicklyCrystal Oscillator(XO)Temperature Compensated(TCXO)Oven Controlled(OCXO)Rubidium OscillatorHydrogen MaserOpticalClockCesiumBeam5mm$1McenturiesRack mount$20,000monthsSizeCost1 shold 2025,Amazon Web Services,Inc.or its affiliates.All rights reserved.Butall oscillators drift Manuf