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ClickHouse

ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.

ClickHouse

ClickHouse Reviews and Details

This page is designed to help you find out whether ClickHouse is good and if it is the right choice for you.

Screenshots and images

  • ClickHouse Landing page
    Landing page //
    2019-06-18

Features & Specs

  1. High Performance

    ClickHouse is designed for fast processing of analytical queries, often performing significantly faster than traditional databases due to its columnar storage format and optimized query execution.

  2. Scalability

    The system is built to handle extensive datasets by scaling horizontally through distributed cluster configurations, making it suitable for big data applications.

  3. Real-time Data Ingestion

    ClickHouse supports real-time data ingestion and can immediately reflect changes in query results, which is valuable for use cases requiring instant data processing and analysis.

  4. Cost Efficiency

    The open-source nature of ClickHouse makes it a cost-effective option, especially when compared to other commercial data warehouses.

  5. SQL Compatibility

    ClickHouse features strong SQL support, which makes it easier for individuals with SQL expertise to transition and use the platform effectively.

  6. Compression

    ClickHouse employs advanced compression algorithms that reduce storage requirements and improve query performance.

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Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about ClickHouse and what they use it for.
  • Replicate MySQL to ClickHouse with Sling
    ClickHouse is a columnar OLAP database. It runs aggregate queries across billions of rows in seconds. MySQL is what most apps run on for transactional reads and writes. Different jobs, different storage shapes, which is why people end up running them side by side: MySQL for the app, ClickHouse for analytics on top of the app's data. - Source: dev.to / about 2 months ago
  • Why LLMs Can't Replace Your SREs (Yet)
    ClickHouse just dropped a study that every executive should read: LLMs are great at some things, but basing your infrastructure on them? Too much, too soon. - Source: dev.to / 2 months ago
  • How we give every user SQL access to a shared ClickHouse cluster
    That's the problem we needed to solve for Query & Dashboards. The answer is TRQL (Trigger Query Language), a SQL-style language that compiles to secure, tenant-isolated ClickHouse queries. Users write familiar SQL. TRQL handles the security, the abstraction, and the translation. - Source: dev.to / 4 months ago
  • Embedding AI Inside PostgreSQL : Building a Native C++ Extension.
    My goal was a bit bold: to integrate AI directly into the Postgres kernel, making the database self-aware. This led me to a new domain, inspired by the ClickHouse open take-home challenge. - Source: dev.to / 8 months ago
  • Why Your Snowflake Bill is High and How to Fix It with a Hybrid Approach
    For use cases demanding sub-second latency at very high concurrency (like real-time observability), specialized engines like ClickHouse often provide superior price-performance. - Source: dev.to / 8 months ago
  • An overengineered solution to `sort โ€“ uniq -C` with 25x throughput (hist)
    I'd not heard of clickhouse before. It does seem interesting, but I just can't get behind a project that says: > The easiest way to download the latest version is with the following command: > curl https://clickhouse.com/ | sh Like, sure, there is some risk downloading a binary or running an arbitrary installer. But this is just nuts. - Source: Hacker News / 9 months ago
  • Setting up ClickHouse on macOS and Testing with Node.js
    ClickHouse is an open-source columnar database built for high-performance analytical queries. This guide shows how I installed ClickHouse on macOS, ran it in the background using a lightweight nohup setup that stores logs and PID in hidden user folders, and tested it with a minimal Node.js + TypeScript example using @clickhouse/client. - Source: dev.to / 10 months ago
  • From Go to Rust: Supercharging Our ClickHouse UDFs with Alloy
    At Agnostic, we build open-source infrastructure for collaborative blockchain data platforms. One of our flagship tools is clickhouse-evm, a suite of high-performance User Defined Functions (UDFs) that brings native Ethereum decoding and querying capabilities directly into ClickHouse. - Source: dev.to / about 1 year ago
  • ๐Ÿง  From Hive and Elastic to ClickHouse: What Surprised Me
    Over the past few weeks, Iโ€™ve been diving into ClickHouse โ€” and itโ€™s been full of surprises. - Source: dev.to / about 1 year ago
  • Cross-Compiling Haskell under NixOS with Docker
    I attended the AWS Summit 2025 in Singapore. I enjoyed the event. There were booths from various companies which I found interesting, such as GitLab and ClickHouse. More importantly, I got to meet very interesting people. - Source: dev.to / about 1 year ago
  • How to Build a Streaming Deduplication Pipeline with Kafka, GlassFlow, and ClickHouse
    ClickHouse: A fast columnar database. It will be our final destination for clean data. And, for simplicity in this tutorial, we'll cleverly use it as our "memory" or state store to remember which events we've already seen recently. - Source: dev.to / about 1 year ago
  • Why You Shouldnโ€™t Invest In Vector Databases?
    In fact, even in the absence of these commercial databases, users can effortlessly install PostgreSQL and leverage its built-in pgvector functionality for vector search. PostgreSQL stands as the benchmark in the realm of open-source databases, offering comprehensive support across various domains of database management. It excels in transaction processing (e.g., CockroachDB), online analytics (e.g., DuckDB),... - Source: dev.to / about 1 year ago
  • Twitter's 600-Tweet Daily Limit Crisis: Soaring GCP Costs and the Open Source Fix Elon Musk Ignored
    ClickHouse: ClickHouse is an open-source columnar database management system designed for high-performance analytics. It excels at processing large volumes of data and offers real-time querying capabilities. Itโ€™s probably the worldโ€™s fastest real-time data analytics system: ClickHouse Benchmark. - Source: dev.to / over 1 year ago
  • DeepSeek's Data Breach: A Wake-Up Call for AI Data Security
    Further investigation revealed that these ports provided direct access to a publicly exposed ClickHouse databaseโ€”entirely unprotected and requiring no authentication. This discovery raised immediate security concerns, as ClickHouse is an open-source, columnar database management system designed for high-speed analytical queries on massive datasets. Originally developed by Yandex, ClickHouse is widely used for... - Source: dev.to / over 1 year ago
  • Should You Ditch Spark for DuckDB or Polars?
    Clickhouse also has managed service (https://clickhouse.com/). - Source: Hacker News / over 1 year ago
  • ClickHouse: The Key to Faster Insights
    ClickHouse is rapidly gaining traction for its unmatched speed and efficiency in processing big data. Cloudflare, for example, uses ClickHouse to process millions of rows per second and reduce memory usage by over four times, making it a key player in large-scale analytics. With its advanced features and real-time query performance, ClickHouse is becoming a go-to choice for companies handling massive datasets. In... - Source: dev.to / over 1 year ago
  • Show HN: BemiDB โ€“ Postgres read replica optimized for analytics
    And you can try it right now. Install ClickHouse:
        curl https://clickhouse.com/ | sh.
    - Source: Hacker News / over 1 year ago
  • Kotlin DataFrame โค๏ธ Arrow
    ClickHouse is a high-performance, column-oriented SQL database management system (DBMS) designed for online analytical processing (OLAP). ClickHouse allows using Arrow Stream as an output format. - Source: dev.to / about 2 years ago
  • Clickhouse for Embedded Analytics: First Impressions and Unexpected Challenges
    We started to look for alternatives and quickly landed at Clickhouse. - Source: dev.to / almost 2 years ago
  • Lessons Learned #2: Your new feature could introduce a security vulnerability to your old feature (Clickhouse CVE-2024-22412)
    In todayโ€™s story, we will discuss CVE-2024-22412 which affected ClickHouse a popular open-source column-oriented database management system typically used for online analytical processing (OLAP) in real-time. You can find the full write-up of the vulnerability here. - Source: dev.to / almost 2 years ago
  • How we Built 300ฮผs Typo Correction for 1.3M Words in Rust
    We chose ClickHouse to store the dictionary as we ran into deadlock and performance issues with Postgres writes as we scaled the number of workers. ClickHouse's async inserts are fantastic for this task and allowed us to ingest the entire 38M+ document dataset in < 1hr. - Source: dev.to / almost 2 years ago

Summary of the public mentions of ClickHouse

ClickHouse, an open-source, column-oriented, distributed database management system, is increasingly recognized for its speed and efficiency in handling large volumes of data. This rise is reflected in numerous professional discussions and articles highlighting its capabilities and use cases in real-world scenarios. As an Online Analytical Processing (OLAP) database, ClickHouse is particularly noted for its ability to process massive datasets efficiently and provide real-time querying capabilities.

Key Strengths and Use Cases

  1. Performance and Efficiency:

    • ClickHouse's columnar architecture makes it highly efficient for aggregation and "group by" operations, especially when sorting by multiple columns. This feature significantly enhances performance in analytical queries, as noted by industry experts like Tyler Hannan from ClickHouse.
    • Organizations such as Cloudflare leverage ClickHouse to process millions of rows per second, substantially reducing memory usage and enhancing data processing speed.
  2. Ease of Use and Integration:

    • ClickHouse is praised for its ease of setup and maintenance, which is particularly appealing to companies looking to efficiently deploy and manage databases without extensive overhead.
    • It offers seamless integration with BI tools and other technologies, facilitating the creation and management of APIs with minimal coding, as demonstrated in use cases involving APISIX integration.
  3. Wide Adoption and Versatility:

    • Its open-source nature and Apache License ensure widespread adoption and flexibility across various data-intensive sectors.
    • ClickHouse has been employed in diverse applications from storing log data to running real-time data analytics and even acting as a "memory" state store for deduplication pipelines.

Competitive Landscape

ClickHouse stands out among its competitors like MySQL, PostgreSQL, and Apache Doris due to its specific OLAP capabilities. Compared to PostgreSQL, for instance, ClickHouse offers better performance for certain analytical workloads, as indicated in discussions around vector search functionality. It also poses a faster alternative for moving analytical workloads away from MongoDB, thanks to its JSON support and ability to handle nested data structures.

Security and Challenges

Despite its strengths, ClickHouse has not been without challenges. Security vulnerabilities, such as CVE-2024-22412, highlight potential risks associated with its use, emphasizing the importance of diligent security practices in its deployment. Additionally, instances of unauthenticated public exposure of ClickHouse databases underline the need for robust access control and authentication mechanisms to mitigate risks in real-time data processing environments.

Conclusion

ClickHouse is firmly establishing itself as a leader in the domain of high-performance data analytics. Its rapid processing capabilities, ease of integration, and widespread adoption make it a compelling choice for enterprises seeking to gain faster insights from their data. While security concerns exist, their resolution through best practices and updates can help maintain ClickHouse's position as a top contender in OLAP solutions.

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Is ClickHouse good? This is an informative page that will help you find out. Moreover, you can review and discuss ClickHouse here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.