General Questions About ClickHouse

• What is ClickHouse?
• Why is ClickHouse so fast?
• Who is using ClickHouse?
• What does "ClickHouse" mean?
• What does "Не тормозит" mean?
• What is OLAP?
• What is a columnar database?
• How do I choose a primary key?
• Why not use something like MapReduce?
• How do I contribute code to ClickHouse?

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