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push vs pull

2 articles · Page 1 of 1
Random Bulletin
Random Bulletin
Aug 17, 2026 · Operations

Push vs Pull for Million‑QPS Monitoring: Hybrid Edge Pull and Central Push

At massive scale, the choice between push‑based and pull‑based metric collection determines monitoring system survivability; the article examines StatsD’s push model, Prometheus’s pull model, their trade‑offs, and proposes a hybrid edge‑pull, central‑push architecture to balance flow control, health checks, and network topology.

Hybrid ArchitecturePrometheusStatsD
0 likes · 18 min read
Push vs Pull for Million‑QPS Monitoring: Hybrid Edge Pull and Central Push
Dabaoshi
Dabaoshi
Aug 9, 2026 · Fundamentals

Observer Pattern: Decoupling Order Payment Success Actions via Publish‑Subscribe

The article explains the Observer pattern by first showing the problems of hard‑coding post‑payment actions, then detailing how defining a subject, observer interface, and concrete observers decouples the system, discusses push vs pull notification models, and illustrates real‑world uses in Spring events, GUI listeners, and message queues.

JavaObserver PatternPublish‑Subscribe
0 likes · 14 min read
Observer Pattern: Decoupling Order Payment Success Actions via Publish‑Subscribe