1. offset explorer
2. topics, partitions and offset
- data is kept for a limit time (default 1 week)
- data is randomly assigned to partition unless key is provided
3. brokers and topics
- brokers are servers, if you connect to one broker, you connect to all
- a broker store topic.partition, e.g. broker1 can store topic1.partition1 and topic2.partition3
- topic has replication factor > 1, meaning redundant in storage
4. consumer group
- each consumer in group read 1 or more partition, and exclusively
reference
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