Managing Durability & Consistency with Apache Kafka in Node.js

Managing Durability

Configuring Replication and Partitioning in Kafka: When creating a topic, you can specify the number of partitions for that topic along with the replication factor. The replication factor is the number of replicas for each partition, determining the number of brokers that each message will be replicated to.

Example: Let's say you have a orders topic with 3 partitions and a replication factor of 2. This means each message will be replicated to 2 different brokers. In case one broker experiences a failure, you can still access the messages from the remaining broker.

Ensuring Consistency

Acknowledgment Mechanism when Sending and Receiving Messages: In Apache Kafka, you can use the acknowledgment mechanism when sending and receiving messages to ensure accuracy and durability. This mechanism ensures that messages have been sent successfully or acknowledged before you proceed with further actions.

Example: When sending messages, you can use the acks option to specify the acknowledgment configuration. For example, acks: 1 ensures that the message has been successfully sent to the leader broker of the partition. By waiting for acknowledgment, you'll know when a message has been safely stored before continuing with other tasks.

const { Kafka } = require('kafkajs');

const kafka = new Kafka({
  clientId: 'your-client-id',
  brokers: ['broker1:port1', 'broker2:port2'],

const producer = kafka.producer();

const sendMessages = async () => {
  await producer.connect();
  await producer.send({
    topic: 'your-topic',
    messages: [{ value: 'Hello Kafka!' }],
    acks: 1, // Acknowledge after the message is successfully sent
  await producer.disconnect();



  • Make sure to replace 'your-client-id', 'broker1:port1', 'your-topic', and other values with your project's actual information.
  • Configuration options and acknowledgment mechanisms may vary depending on the specific project requirements.

By configuring partitioning, replication, using acknowledgment mechanisms, and replication options, you can effectively manage Durability and Ensuring Consistency in Apache Kafka when using Node.js.