The week pgbouncer stopped being news
Transaction pooling, one SET that didn't stick, and a standup that moved on.
Backend
tag:
backend
all tags →2018
2017
Designing a wallet
What a digital wallet looks like underneath -- a balance, a ledger, idempotency keys, and the gap between moving money and moving money correctly.
2015
Graph queries for a social feed
Why 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.
2012
A fifty-line rate limiter
In-memory rate limiting as Express middleware. No Redis, no external service. Fifty lines, one file.
Connection pooling
The Node.js MySQL driver doesn't pool connections. Under load, you run out. Fifty lines with generic-pool fixes it.
URL mapping in Redis
Loading every product, category, and brand URL into a Redis hash at startup, and a middleware that rewrites requests before Express sees them.
Rolling your own search
Building catalog search with flattened MongoDB documents and application-side scoring when the proper tools don't exist yet.