Backpressure, and a Cancel That Doesn't Cancel
A bounded queue forces you to decide who waits. Cancellation forces you to decide what an error means.
#concurrency
4 posts
Group Commit, or Refusing to Pay for fsync Alone
Getting from 255 writes a second to nearly ten thousand, without weakening a single durability guarantee.
The Sequence Number That Was Never Written Down
The LSN is the identity of every record in the log. It isn't stored on disk, and three problems follow from that.
Idempotency Is a Race Until the Database Says Otherwise
Check-then-insert looks correct and isn't. The only reliable fix is to stop checking and let a constraint decide.