PostgreSQL HA
2021.074Streaming replication, automated failover, and the operational lessons that aren't in the PostgreSQL docs -- split-brain, silent lag, and why DR drills matter more than DR plans.
Writing
2021
2020
The crossover
2020.267The first migration had a platform on fire. The second has one that works. That is the harder one.
2019
The board stayed green
2019.295The board put us ahead of every customer ticket - until it stayed green while the data underneath it went wrong.
Prescaling for a known spike
2019.074Autoscale never helped in the time of crisis. What helped was prescaling -- capacity ready before the traffic arrives.
2018
Consul in practice
2018.253Service discovery, health checks, and dynamic config across a growing fleet of microservices -- and the moment KV store got too popular.
The compiler as first reviewer
2018.199How a growing team adopted Go -- not through boot camps, but through code review, shadowing, and a compiler that wouldn't let anyone be sloppy.
The week pgbouncer stopped being news
2018.193Transaction pooling, one SET that didn't stick, and a standup that moved on.
The GraphQL buffer
2018.110A GraphQL gateway that started as a unified API layer for clients became the place where we could intervene without touching the backends.
The war room
2018.041The prep runs out ninety minutes in. The rest is improvised on a floor where nobody leaves.
2017
The same tree, twice
2017.265I've built a rules engine twice, in two languages, at two scales. The tree is the same.
Designing a wallet
2017.232What a digital wallet looks like underneath -- a balance, a ledger, idempotency keys, and the gap between moving money and moving money correctly.
Hazard lights
2017.161We wired physical lights to 5xx alerts. It changed how the team reacts to production issues.
Nginx load balancing decisions
2017.138Algorithm selection, passive health checking, per-endpoint rate limiting, and upstream timing -- the decisions that matter when Nginx sits in front of production traffic.
The first service
2017.074Picking the first piece to cut from a Perl monolith, rewriting it in Go, and switching over before you lose your nerve.
2016
Switching to Go
2016.342Migrating a payment processing API from Node.js to Go -- what changed, what improved, and what we gave up.
2015
Building with one other person
2015.084What a codebase looks like when two people build everything -- 350 commits, and a todo list with two items.
Graph queries for a social feed
2015.041Why a graph database was the only sane choice for a social feed where the interesting question isn't what your friends posted, but what your friends' friends are doing this Saturday.
2014
Two-sided graph
2014.319Adding businesses to a social platform built on Neo4j -- and realizing both sides of the marketplace use the same graph patterns.
The middleware chain
2014.232Two people, one Express app, and eight middleware functions between the request and the response.
Git history with Gource
2014.158Turning months of git commits into an animated video with Gource and ffmpeg -- then opening the weekly sharing session with it.