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Xiaokun's Architecture Exploration Notes
Xiaokun's Architecture Exploration Notes
May 4, 2025 · Fundamentals

Why Unreliable Clocks Threaten Distributed Systems—and How to Fix Them

This article examines how unreliable physical clocks—both wall and monotonic—affect distributed systems, compares synchronous and asynchronous network timing, illustrates conflicts caused by timestamp drift, and presents logical clocks and Google’s TrueTime as robust solutions for achieving consistent ordering and data reliability.

TrueTimeclock synchronizationdistributed systems
0 likes · 11 min read
Why Unreliable Clocks Threaten Distributed Systems—and How to Fix Them
Code Ape Tech Column
Code Ape Tech Column
Feb 19, 2021 · Databases

Understanding Timestamps in Distributed Transactions: TSO, TrueTime, Lamport Clock, and HLC

This article explains the role of timestamps in distributed transaction processing, comparing implementations such as MVCC‑based TSO, Google’s TrueTime, Lamport logical clocks, and Hybrid Logical Clocks, and discusses their impact on linearizability, consistency guarantees, and practical designs like TiDB Async Commit.

HLCMVCCTSO
0 likes · 14 min read
Understanding Timestamps in Distributed Transactions: TSO, TrueTime, Lamport Clock, and HLC
High Availability Architecture
High Availability Architecture
Jul 6, 2017 · Databases

Linearizability, Serializability, and TrueTime in Google Spanner

This article explains the concept of linearizability, contrasts it with serializability, and describes how Google Spanner uses the TrueTime API and commit‑wait mechanisms to provide external consistency and reliable snapshot reads in a globally distributed database system.

LinearizabilitySpannerTrueTime
0 likes · 17 min read
Linearizability, Serializability, and TrueTime in Google Spanner
Qunar Tech Salon
Qunar Tech Salon
May 20, 2015 · Databases

An Overview of Google Spanner: Architecture, Design, and Concurrency Control

This article provides a comprehensive overview of Google Spanner, a globally distributed, multi‑version database, covering its background, core components, TrueTime‑based global synchronization, Paxos replication, data model, and the various transaction and concurrency mechanisms it employs.

Database ArchitectureDistributed DatabaseGoogle Spanner
0 likes · 19 min read
An Overview of Google Spanner: Architecture, Design, and Concurrency Control