distributed systems
8 minCausal order: what a logical clock can and cannot tell you
Distinguish event causality from wall-clock order with Lamport and vector clocks.
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Q&A
Q&AWhat does vector-clock incomparability represent?
Concurrent histories under the vector clock identity and propagation model.
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If neither vector is component-wise less than the other, neither history contains all represented knowledge of the other. This does not establish physical-time order or choose a globally agreed winner.
databases
5 minSQL Event Gaps: LAG, Stable Ordering, and Explicit Window Frames
Investigate missing heartbeats with PostgreSQL interval arithmetic and a separate SQLite integer-millisecond contract.
devops
5 minIncident Timelines: Separate Event Time, Receipt Time, and Clock Evidence
Reconstruct a deployment incident without mistaking log delivery order or clock skew for causal ordering.