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Physical vs Logical Clocks, and the Limits of NTP

This generated surface maps a learner-facing curriculum unit to its canonical source routes.

Curriculum surface​

  • Open learner-facing unit
  • Curriculum path: content/curriculum/architecture/semester-06-databases-distributed/module-05-distributed-systems-fundamentals/concepts/cluster-02-time-clocks-and-ordering/04-physical-vs-logical-clocks-and-ntp-limits-primary.md
  • App: architecture
  • Semester: semester-06-databases-distributed
  • Module: module-05-distributed-systems-fundamentals
  • Unit kind: concept
  • Curation level: module_curated

Learning objectives​

  • Explain Physical vs Logical Clocks, and the Limits of NTP in terms of failure models, ordering, coordination, and tradeoffs instead of distributed-systems folklore.
  • Use Physical vs Logical Clocks, and the Limits of NTP to predict system behavior under delay, partial failure, or disagreement between nodes.
  • Use database-internals, ddia, distributed-systems-concepts-and-design to connect the learner page to clocks, failure detectors, consensus, and real coordination patterns.

Prerequisites​

  • Comfort reasoning about replication, partitioning, and database failure modes from the earlier semester modules.

Source books​

  • database-internals
  • ddia
  • distributed-systems-concepts-and-design

Source routes​

Database Internals​

Ddia​

Distributed Systems Concepts And Design​

Supporting curriculum routes​

No supporting curriculum routes linked yet.

External enrichment​

  • The Secret Lives of Data: Raft (read_if_stuck) - Useful when the learner needs a visual explanation of ordering, leadership, and replication before returning to the source texts.
  • etcd Documentation (official_docs_companion) - Anchors distributed-systems fundamentals in a real coordination system with practical operational semantics.

AI companion modes​

  • Explain simply
  • Socratic tutor
  • Challenge my understanding
  • Diagnose my confusion
  • Connect forward / backward

Source-of-truth note​

This teaching unit is learner-facing guidance assembled from multiple canonical book routes. Use the listed source books as the primary conceptual spine for Physical vs Logical Clocks, and the Limits of NTP, and treat outside material as supporting enrichment only.