---
title: General questions about ClickHouse
toc_hidden_folder: true
toc_priority: 1
toc_title: General
---

# General Questions About ClickHouse {#general-questions}

Questions:

-   [What is ClickHouse?](../../index.md#what-is-clickhouse)
-   [Why ClickHouse is so fast?](../../faq/general/why-clickhouse-is-so-fast.md)
-   [Who is using ClickHouse?](../../faq/general/who-is-using-clickhouse.md)
-   [What does “ClickHouse” mean?](../../faq/general/dbms-naming.md)
-   [What does “Не тормозит” mean?](../../faq/general/ne-tormozit.md)
-   [What is OLAP?](../../faq/general/olap.md)
-   [What is a columnar database?](../../faq/general/columnar-database.md)
-   [Why not use something like MapReduce?](../../faq/general/mapreduce.md)
-   [How do I contribute code to ClickHouse?](../../faq/general/how-do-i-contribute-code-to-clickhouse.md)

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    Check out [other F.A.Q. categories](../../faq/index.md) or browse around main documentation articles found in the left sidebar.

{## [Original article](https://clickhouse.com/docs/en/faq/general/) ##}