The Kafka service is supported in E-MapReduce (EMR) V3.4.0 and later.
Create a Kafka cluster
In the EMR console, create a Kafka cluster. For more information, see Create a cluster.
Kafka clusters with local disks
For information about instances that use local disks, see Supported instances with local disks.
|default.replication.factor||The value is fixed to 3, which indicates that each topic has three replicas.|
|min.insync.replicas||The value is fixed to 2, which indicates that the number of replicas is greater than or equal to 2.
A write is successful only if the producer sets the request.required.acks parameter to all or -1 and the number of replicas that acknowledge the write is greater than or equal to 2.
|zookeeper.connect||Specifies the hostname and port of the ZooKeeper server that is connected to the Kafka cluster.|
|kafka.heap.opts||The heap memory size of the Kafka broker.|
|num.io.threads||The number of I/O threads of the Kafka broker. The default value is twice the number of CPU cores of the master node.|
|num.network.threads||The number of network threads of the Kafka broker. The default value is the number of CPU cores of the master node.|