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14 Kafka - Coggle Diagram

- - - - No Key => use Round robin
    - - Key => Hash function => mod partition
        
        Key preserve the message order
        
        To ensure messages with same key are read in order
        (by messages of same keys will be appended to the same partition)
    - - Brokers => As a (physical) infra node
    - - Partition replication for Fault-tolerance
        (happen behind the scene)
        
        1 Lead Partition and
        N-1 Followers partitions