The Basics
💡 Fact
- Every Kafka config is set to its default, unless mentioned explicitly in these pages.
- All traffic is assumed to be evenly distributed.
- Replication Factor is set to 3
- Brokers are evenly split across availability zones.
Replication Factor == 3
This is the minimum for a safe deployment. Kafka doesn't fsync to disk and therefore relies on replication to ensure durability. And it's the default setting.