Q46: What are Retryable Writes and Retryable Reads?

Retryable Writes and Reads allow MongoDB drivers to automatically retry transient network errors or replica set failovers once without throwing application errors. Enabled by default in modern drivers (retryWrites=true). Operations must be idempotent.

Key Takeaways
  • Handles transient network glitches automatically.
  • Requires replica set deployments and idempotent operations.
Knowledge Check

Are Retryable Writes enabled by default in modern MongoDB drivers?