Cianplan

Level 2: Data · L2.2 Replication

Replication lag anomalies

Diagnose read-your-writes and monotonic-read violations and fix them.

12 min · Pro

What you take away

  • Read-your-writes: a user's own change disappears because the read landed on a replica that has not applied it.

And 3 more inside the class, in Pro.

How the class is laid out

  1. The problem
  2. The simple version
  3. The three anomalies
  4. What to actually do
  5. Check your understanding