Comments (3)
- Kafka maintains feeds of messages in categories called _topics_.
- We'll call processes that publish messages to a Kafka topic _producers_.
- We'll call processes that subscribe to topics and process the feed of published messages _consumers_.
- Kafka is run as a cluster comprised of one or more servers each of which is called a _broker_.
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- Partition:topic物理上的分组,一个topic可以分为多个partition,每个partition是一个有序的队列。
- Segment:partition物理上由多个segment组成。
- offset:每个partition都由一系列有序的、不可变的消息组成,这些消息被连续的追加到partition中。partition中的每个消息都有一个连续的序列号叫做offset,用于partition唯一标识一条消息.
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