- 查看topic信息
./kafka-topics.sh --describe --zookeeper zk:2181 --topic topicName25/03/08 16:05:29 INFO zkclient.ZkClient: zookeeper state changed (SyncConnected)
Topic:topicName PartitionCount:3 ReplicationFactor:3 Configs:Topic: topicName Partition: 0 Leader: 52 Replicas: 52,54,53 Isr: 52,54,53Topic: topicName Partition: 1 Leader: 53 Replicas: 53,52,54 Isr: 53,52,54Topic: topicName Partition: 2 Leader: 54 Replicas: 54,53,52 Isr: 54,53,52此时topic数据为kafka默认的配置
- 修改已有的topic数据保存时间（某一个）
./kafka-topics.sh --zookeeper zk:2181 -topic topicName --alter --config retention.ms=267840000019/04/09 16:07:29 INFO zkclient.ZkClient: zookeeper state changed (SyncConnected)
Topic:topicName PartitionCount:3 ReplicationFactor:3 Configs:retention.ms=2678400000Topic: topicName Partition: 0 Leader: 52 Replicas: 52,54,53 Isr: 52,54,53Topic: topicName Partition: 1 Leader: 53 Replicas: 53,52,54 Isr: 53,52,54Topic: topicName Partition: 2 Leader: 54 Replicas: 54,53,52 Isr: 54,53,52可以看到Configs后面有个retention.ms=2678400000参数，改参数是我们修改的参数
注：kafka-topics.sh修改配置已被弃用，后续版本会删除，建议需要统一使用kafka-configs.sh来修改参数。
kafka-configs.sh使用
- 查看topic修改的配置信息
./kafka-configs.sh --describe --zookeeper zk:2181 --entity-type topics --entity-name topicNameConfigs for topic 'taopicName' are retention.ms=2678400000如果使用默认配置，则显示
Configs for topic 'topicName' are - 修改配置
./kafka-configs.sh --zookeeper zk:2181 --alter --entity-name topicName --entity-type topics --add-config retention.ms=60000配置完成后，所有超过时间的数据会先被标记为deleted，稍后清空全部标记为deleted的文件
-rw-r--r-- 1 kafka kafka 1073620774 11月 16 08:53 00000000000601378207.log.deleted -rw-r--r-- 1 kafka kafka 156852 11月 16 08:53 00000000000601378207.timeindex.deleted -rw-r--r-- 1 kafka kafka 108432 11月 16 08:57 00000000000601456930.index.deleted -rw-r--r-- 1 kafka kafka 1073728104 11月 16 08:57 00000000000601456930.log.deleted -rw-r--r-- 1 kafka kafka 157356 11月 16 08:57 00000000000601456930.timeindex.deleted -rw-r--r-- 1 kafka kafka 111472 11月 16 09:00 00000000000601538370.index.deleted -rw-r--r-- 1 kafka kafka 1073383897 11月 16 09:00 00000000000601538370.log.deleted -rw-r--r-- 1 kafka kafka 161004 11月 16 09:00 00000000000601538370.timeindex.deleted -rw-r--r-- 1 kafka kafka 111544 11月 16 09:04 00000000000601614505.index.deleted -rw-r--r-- 1 kafka kafka 1073645607 11月 16 09:04 00000000000601614505.log.deleted -rw-r--r-- 1 kafka kafka 161304 11月 16 09:04 00000000000601614505.timeindex.deleted -rw-r--r-- 1 kafka kafka 113240 11月 16 09:08 00000000000601697084.index.deleted -rw-r--r-- 1 kafka kafka 1073650121 11月 16 09:08 00000000000601697084.log.deleted -rw-r--r-- 1 kafka kafka 164424 11月 16 09:08 00000000000601697084.timeindex.deleted -rw-r--r-- 1 kafka kafka 113816 11月 16 09:12 00000000000601786671.index -rw-r--r-- 1 kafka kafka 1073660828 11月 16 09:12 00000000000601786671.log -rw-r--r-- 1 kafka kafka 164388 11月 16 09:12 00000000000601786671.timeindex查看Kafka日志发现日志删除
09:11:30,784 INFO kafka.log.TimeIndex: Deleting index /kafka/data/log_lnk_data_flow-0/00000000000601378207.timeindex.deleted 09:11:30,785 INFO kafka.log.TimeIndex: Deleting index /kafka/data/log_lnk_data_flow-0/00000000000601456930.timeindex.deleted 09:11:30,786 INFO kafka.log.TimeIndex: Deleting index /kafka/data/log_lnk_data_flow-0/00000000000601301258.timeindex.deleted
更多命令可参考：https://blog.csdn.net/zhangshenghang/article/details/89158167
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