Frequently Asked Questions about ClickHouse

Who are ClickHouse?

ClickHouse is an open-source columnar database management system designed for online analytical processing (OLAP). It was developed by Yandex, a Russian multinational IT company, and is known for its ability to handle large volumes of data at high speeds.

What are ClickHouses products?

ClickHouse offers a high-performance analytical database that allows users to manage and query large datasets efficiently. The core product is the ClickHouse server, which provides real-time data analysis capabilities.

What services do ClickHouse offer?

ClickHouse provides services including database management, data warehousing, and support for real-time analytics. They also offer community support through forums and documentation for users of the open-source version.

What type of companies do ClickHouses products suit?

ClickHouses products are suitable for companies that require high-speed data analysis, such as e-commerce, finance, telecommunications, and any organisation that deals with large volumes of data and requires real-time insights.

How much does ClickHouses product cost?

ClickHouse is open-source and free to use. However, enterprises may opt for commercial support or managed services, which can incur costs depending on the specific services and support levels chosen.

Does ClickHouse offer a free trial?

As ClickHouse is an open-source software, there is no need for a free trial. Users can download and use the software without any cost. For managed services, trial options may vary based on the service provider.

What discounts does ClickHouse offer on their products?

Being an open-source product, ClickHouse itself does not offer discounts as there is no purchase price. For commercial support or managed services, any discounts would depend on the specific arrangements made with service providers.

Are there any hidden fees or additional costs with ClickHouse?

There are no hidden fees associated with the open-source version of ClickHouse. However, if users opt for commercial support or managed services, costs may vary based on the service level agreements.

Who uses ClickHouses products?

ClickHouse is used by a variety of organisations, including large enterprises, startups, and tech companies that require robust data analysis capabilities. Notable users include companies in sectors like e-commerce, finance, and telecommunications.

What are the main features of ClickHouses products/services?

Key features of ClickHouse include:

• High-speed data processing and querying
• Real-time analytics
• Scalability to handle vast datasets
• Support for complex queries and analytical functions
• Open-source accessibility

How does ClickHouse compare to its competitors?

ClickHouse is known for its speed and efficiency in processing large datasets compared to other analytical databases. While competitors may offer similar functionalities, ClickHouse stands out due to its columnar storage design, which optimises read performance for analytical queries.

Is ClickHouses platform easy to use?

ClickHouse is designed for users with technical expertise in database management. While the platform has a learning curve, comprehensive documentation and community support are available to assist users in navigating its functionalities.

How easy is it to set up ClickHouses product or service?

Setting up ClickHouse can be straightforward for those familiar with database installations. The open-source version can be installed on various platforms, and detailed installation guides are available on the official website.

Is ClickHouse reliable?

ClickHouse is considered reliable for analytical processing tasks, particularly in production environments where performance and uptime are critical. Its architecture is designed to provide high availability and fault tolerance.

Does ClickHouse offer customer support?

ClickHouse offers community support through forums and documentation. For users of the commercial version, dedicated support options may be available depending on the chosen service provider.

How secure is ClickHouseÕs platform?

ClickHouse implements various security features, including user authentication, access control, and data encryption. However, security largely depends on user configurations and deployment practices.

Does ClickHouse integrate with other tools or platforms?

ClickHouse supports integration with various data ingestion tools, BI tools, and other databases, enabling seamless data workflows. Popular integrations include Apache Kafka, Grafana, and various ETL tools.

Can I use ClickHouse on mobile devices?

ClickHouse itself is a backend database and does not have a mobile application. However, users can access ClickHouse through web-based interfaces or integrate it with mobile applications using APIs.

What do users say about ClickHouse?

User feedback on ClickHouse typically highlights its speed and efficiency in handling large datasets. Some users note the learning curve associated with its use, particularly for those unfamiliar with database management.

What are the pros and cons of ClickHouse?

Pros:

• High performance for analytical queries
• Open-source and freely available
• Scalable architecture

Cons:

• Requires technical expertise for setup and management
• Limited support for transactional workloads

How can I purchase ClickHouseÕs services?

As ClickHouse itself is open-source, there is no purchase necessary. For commercial support or managed services, users should contact service providers offering ClickHouse solutions.

What is the cancellation or refund policy for ClickHouse?

As ClickHouse is open-source and free to use, there are no cancellation or refund policies applicable. Users of commercial services should consult their service providers policies regarding cancellations and refunds.

Who uses ClickHouse?

ClickHouse is used by various organisations, including startups, large enterprises, and tech companies, particularly those in need of efficient data analysis and reporting capabilities.

What are the common use cases for ClickHouse?

Common use cases include real-time analytics, data warehousing, business intelligence reporting, and handling large-scale data processing tasks across various industries.

Why choose ClickHouse over other options?

ClickHouse is often chosen for its speed in querying large datasets, scalability, and the fact that it is open-source, making it a cost-effective solution for businesses requiring robust data analytics.

How easy is it to set up ClickHouse?

Setting up ClickHouse is relatively easy for those with database experience. The setup process is well-documented, and users can find guides for various installation methods on the official website.

Does ClickHouse offer training or tutorials?

ClickHouse provides extensive documentation and community-driven resources, including tutorials and guides available on their website to help users learn how to use the platform effectively.

What languages does ClickHouse support?

ClickHouse supports SQL as its primary query language, enabling users to perform data management and analytics tasks. Additionally, it can be integrated with various programming languages via APIs.

What problems does ClickHouse solve?

ClickHouse addresses the need for fast analytical processing of large datasets, enabling organisations to derive insights from data in real-time, which is essential for data-driven decision-making.

Is ClickHouse worth the investment?

For organisations requiring high-performance data analytics solutions, ClickHouse is considered a worthwhile investment due to its speed, scalability, and the flexibility offered by its open-source model.