红帽全球峰会7.6. 内部主题
内部主题由 Kafka 代理和客户端在内部使用。Kafka 有几个内部主题。它们用于存储使用者偏移(__consumer_offsets)或事务状态(__transaction_state)。这些主题可使用以前缀 offsets.topic. 和 transaction.state.log. 开头的专用 Kafka 代理配置选项来配置。最重要的配置选项是：
offsets.topic.replication.factor-
__consumer_offsets主题的副本数。默认值为3。 offsets.topic.num.partitions-
__consumer_offsets主题的分区数。默认值为50。 transaction.state.log.replication.factor-
__transaction_state主题的副本数。默认值为3。 transaction.state.log.num.partitions-
__transaction_state主题的分区数。默认值为50。 transaction.state.log.min.isr-
必须确认写入
__transaction_state主题的最小副本数才能被视为成功。如果无法满足这种最小值，则制作者将失败，但例外。默认值为2。
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