Simon Willison’s Weblog

Single dependency stacks (via) Brandur Leach notes that the core services at Crunchy (admittedly a PostgreSQL hosting and consultancy company) have only one stateful dependency – Postgres. No Redis, ElasticSearch or anything else. This means that problems like rate limiting and search, which are often farmed out to external services, are all handled using either PostgreSQL or in-memory mechanisms on their servers.