liangenhao#learning-in-series#22-主题与分区-主题的管理-修改主题1

--- title: 22-主题与分区-主题的管理-修改主题 date: 2020-01-18 categories: learning-in-kafka tags: [Kafka] --- ## 增加主题的分区 【示例】：修改`topic-config`主题的分区数为3。 先查看原来的分配情况： ```shell bin/kafka-topics.sh --zookeeper localhost:2181/kafka_cluster --describe --topic topic-config Topic:topic-config PartitionCount:1 ReplicationFactor:1 Configs:cleanup.policy=compact,max.message.bytes=10000 Topic: topic-config Partition: 0 Leader: 1 Replicas: 1 Isr: 1 ``` 修改分区数： ```shell bin/kafka-topics.sh --zookeeper localhost:2181/kafka_cluster --alter --topic topic-config --partitions 3 WARNING: If partitions are increased for a topic that has a key, the partition logic or ordering of the messages will be affected Adding partitions succeeded! # 再次查看 bin/kafka-topics.sh --zookeeper localhost:2181/kafka_cluster --describe --topic topic-config Topic:topic-config PartitionCount:3 ReplicationFactor:1 Configs:cleanup.policy=compact,max.message.bytes=10000 Topic: topic-config Partition: 0 Leader: 1 Replicas: 1 Isr: 1 Topic: topic-config Partition: 1 Leader: 2 Replicas: 2 Isr: 2 Topic: topic-config Partition: 2 Leader: 0 Replicas: 0 Isr: 0 ``` > 告警：当主题中的消息包含key时，根据key计�