2017-2-28 Kafka初使用

有道云笔记

[hadoop@hadoop01 bin]$ kafka-topics.sh --create --zookeeper hadoop01,hadoop02,hadoop03 --replication-factor 1 --partitions 3 --topic hadoop01
Created topic "hadoop01".
[hadoop@hadoop01 bin]$ kafka-topics.sh --create --zookeeper hadoop01,hadoop02,hadoop03 --replication-factor 3 --partitions 1 --topic hadoop02
Created topic "hadoop02".
[hadoop@hadoop01 bin]$ kafka-topics.sh --list --zookeeper localhost:2181
hadoop01
hadoop02
[hadoop@hadoop01 bin]$ kafka-topics.sh --describe --zookeeper localhost:2181 --topic hadoop01
Topic:hadoop01  PartitionCount:3        ReplicationFactor:1     Configs:
        Topic: hadoop01 Partition: 0    Leader: 3       Replicas: 3     Isr: 3
        Topic: hadoop01 Partition: 1    Leader: 1       Replicas: 1     Isr: 1
        Topic: hadoop01 Partition: 2    Leader: 2       Replicas: 2     Isr: 2
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检查log目录，对于topic hadoop01，hadoop01为0号分区，hadoop02为1号分区。
而topic hadoop02则复制了3份，都为0号分区
hadoop01-1
hadoop02-0
hadoop01-2
hadoop02-0
hadoop01-0
hadoop02-0
即：hadoop01-0,1,2
hadoop02-0,0,0