How to set up Kafka replica synchronization mechanism?

To establish a Kafka replica synchronization mechanism, the following steps are required:

1. Configure Kafka server: In the Kafka configuration file, set the replication factor. The replication factor determines the number of replicas for each partition, typically set to a value greater than or equal to 2 to ensure data redundancy and availability.
2. Create a topic using Kafka’s command line tools or API, specifying the replication factor. For example, use the command line tool to create a topic named my_topic with a replication factor of 3.
3. Create a topic named “my_topic” with a replication factor of 3 and 1 partition using the Zookeeper located at localhost:2181.
4. Start the Kafka server: Launch the Kafka server and make sure all server instances are running.
5. Setting up a Producer and Consumer involves connecting them to a Kafka server. The Producer sends messages to a specific Topic, while the Consumer retrieves messages from that Topic.
6. Send a message: Use a Producer to send messages to a Topic, and Kafka will write the message to the primary and secondary replicas of the partition.
7. Replica Synchronization: Kafka automatically replicates messages from the leader replica to other replicas. The replica synchronization mechanism is achieved through Kafka’s log replication. Once a message is written to the leader replica, Kafka replicates it to other replicas to ensure data consistency.

The setup process for the replication synchronization mechanism is automated, with Kafka handling the replication and synchronization of messages automatically. Users only need to correctly configure the replication factor, and then start the Kafka server and Producer/Consumer.