What is ClickHouse

ClickHouse is an open-source columnar relational DBMS from Yandex for fast processing of analytical SQL queries on structured big data in real time. The system can scale up to tens of trillions of records and petabytes of data.


  • High Speed

    The implementation of ClickHouse on the Yandex.Metrica service marks the following indicators: up to 1 billion rows per second on a single server and up to 2 TB per second on a cluster of 400 nodes. Such performance is associated with columnar data storage, physical sorting of data by primary key, parallelization of operations on several processor cores of one server, and support for approximate calculations.

  • Linear Scalability

    Cross Data Center Replication is possible in ClickHouse, which replicates data between clusters, providing failover protection and high-performance data access for globally distributed and mission-critical Big Data applications.

  • Extensibility

    ClickHouse supports a structured query language dialect close to the ANSI SQL standard, with extensions including arrays and nested data structures, URI function, and the ability to connect external key-value storage.

  • High Availability and Fault Tolerance

    Due to decentralisation and the absence of a single point of failure, ClickHouse works reliably in a distributed cluster. The DBMS maintains the complete identity of data on different replicas, automatically recovering them after failures.

  • Ease of Deployment and Convenience of Use

    As a means of connecting to the DBMS, you can use the console, HTTP API, JDBC and ODBC drivers, as well as many “wrappers” in Python, PHP, NodeJS, Perl, Ruby, and R.

Analytics Data Stack Structure

Data Ingestion
Server Technologies
Data Transformation
BI Tools
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ClickHouse Alternatives

  • Google BigQuery

    Google BigQuery is a PaaS service that supports most of the features of a DBMS. It’s a part of the Google Cloud Platform, where there are several dozen more applications for analysing, storing and computing data.

    Read more
  • Amazon Redshift

    Amazon Redshift is columnar cloud-based data warehouse platform, which is useful for systems with a constant load – such as regular reporting and machine learning routines.

    Read more
  • Snowflake

    Snowflake is a cloud-based data processing and storage platform that allows you to combine data from many sources.

    Read more

How We Use ClickHouse

  • Simple

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  • Justschool

    Transparent Marketing Budget Allocation for Investment ROI Assessment

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  • betPawa

    A Flexible and Scalable DWH system Re-Built from Scratch with Improved Data Processing Time and Quality

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