Reliability · Jieun

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Reliability — Articles

Reliability 2026-07-23

Connecting a Custom Domain with One Click — a Pipeline Built Around 'You Can't Speed Up DNS Propagation'

Four purchases, four failures, one 3-stage pipeline
Reliability 2026-07-20

Taking Caddy Out of the Deploy Path — the Structural Problem Was Touching a SPOF Automatically

Removing 60–100s outages, then the last 5 seconds
Reliability 2026-05-17

[Messenger Load-Testing, Part 3] FCM to a Queue, Swallowed Failures to Sentry — Cleaning Up the Message-Send Handler

Isolating external I/O and surfacing swallowed errors
Reliability 2026-05-11

[Messenger Load-Testing, Part 2] There Was a Deadlock Hiding in AI-Generated Code — How We Replaced `unreadCount` with `lastReadAt`

42.8% errors in 9 minutes, caused by one updateMany
Reliability 2026-03-29

Why You Should Never Use KeyDB as a Pub/Sub Broker for Centrifugo

Five years of hang issues behind a perfect-looking active-replica
Reliability 2026-03-26

Building a Crash-Resilient, End-to-End Meeting Recording Pipeline in the Browser

Surviving a 300MB heap and tab crashes with 5-minute savepoints