## Why Single-Database Transactions Don't Scale A transaction in a single database is simple. You start a transaction, make changes, commit. Either everything commits or nothing ...
## Why Replication Exists Your database will crash. Not maybe. It will. Hard drives fail, memory corrupts, someone runs the wrong command, power goes out. When that happens, you ...
There's a gap between understanding how SQL works and understanding how databases actually store bits on disk. Most developers never cross that gap. Their databases just work unti...
## The World Your System Actually Lives In There's a moment in every engineer's career where they ship something beautiful. The code is clean. The tests pass. The performance is ...
## Why This Matters in Production Every backend engineer has a story about a production incident that made ACID properties real. Maybe it was a race condition in a payment system...
## The Real Cost - What happens when you don't have idempotency Every backend engineer has experienced this: a user clicks a button, the request times out, they panic and click i...
You know that feeling when you're searching for a specific book in a library with thousands of volumes, and there's no catalog system? That's basically what your database experien...