Primary PII
2024.310A regulation arrives. The work looks like encryption at first. It is not.
databases
all tags →A regulation arrives. The work looks like encryption at first. It is not.
Cache-aside, write-through, write-behind -- and the three problems that make caching hard: stampedes, coordinated expiry, and invalidation.
Streaming 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.
The index was there. The query was right. Postgres stopped using it anyway.
Transaction pooling, one SET that didn't stick, and a standup that moved on.
Using bind mounts to move MySQL data, config, and logs to an XFS volume without changing a single MySQL setting.
Building catalog search with flattened MongoDB documents and application-side scoring when the proper tools don't exist yet.