Note
not done
A reason for using Kafka is the rate of producer exceed the rate of consumer, you want some buffer in the middle to avoid overflowing the consumer.
| 1 Consumer Group 4 Partitions | 2 Consumer Group 4 Partitions |
|---|---|
 |
 |
| 4 Consumer Group 4 Partitions | 5 Consumer Group 4 Partitions |
 |
 |
| Multiple Consumer Groups | |
 |
- We cant implement fan-out pattern using one consumer group, we need to create multiple of them
- No point adding more consumers than producers, some consumers will be idle.