How to implement Real-time Stream Processing in ClickHouse with Kafka


Kafka is the ideal open source platform to implement real-time stream processing in ClickHouse for real-time analytics. At ChistaDATA Inc., we have extensive experience in working with Kafka in the context of ClickHouse for high-velocity data ingestion at the scale of millions of records per second.

Runbook for Real-time Stream Processing in ClickHouse with Kafka

Real-time stream processing with Kafka and ClickHouse can be implemented in the following steps:

  1. Set up a Kafka cluster: Set up a Kafka cluster, which will be used to collect and store the streaming data.
  2. Configure Kafka to send data to ClickHouse: Configure the Kafka cluster to send the streaming data to ClickHouse. This can be done by setting up a Kafka Connector that connects to a ClickHouse sink.
  3. Create a ClickHouse table: Create a ClickHouse table that matches the schema of the streaming data. This table will be used to store the streaming data.
  4. Configure ClickHouse to consume data from Kafka: Configure ClickHouse to consume data from the Kafka topic. This can be done by setting up a ClickHouse table engine that is configured to read data from a Kafka topic.
  5. Create a ClickHouse materialized view: Create a ClickHouse materialized view that will be used to perform real-time analytics on the streaming data. This view can be used to aggregate, filter, or join the streaming data with other data sources.
  6. Set up a Stream Processing Engine: Set up a stream processing engine such as Kafka Streams or Apache Flink to perform complex stream processing tasks on the data stream.
  7. Set up a monitoring and alerting system: Set up a monitoring and alerting system that can be used to track the performance of the stream processing pipeline and alert if there are any issues.
  8. Analyze and visualize the data: Using the real-time data from the materialized view, perform analysis and create visualizations to gain insights from the data.


By implementing this steps, the data streams can be analyzed in real-time and insights can be extracted from it. Kafka is used as a messaging system to collect, store, and process streaming data, and ClickHouse is used as a real-time analytical database that enables efficient querying and analysis of the streaming data.

To know more about Kafka in ClickHouse context, please do consider reading the below articles: 


About Shiv Iyer 225 Articles
Open Source Database Systems Engineer with a deep understanding of Optimizer Internals, Performance Engineering, Scalability and Data SRE. Shiv currently is the Founder, Investor, Board Member and CEO of multiple Database Systems Infrastructure Operations companies in the Transaction Processing Computing and ColumnStores ecosystem. He is also a frequent speaker in open source software conferences globally.