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How to quickly insert 10 billion rows into ClickHouse?
sobes.tech AI
Answer from AI
For rapid insertion of 10 billion rows into ClickHouse, it is important to use efficient data loading methods:
- Use batch insert with large data blocks to minimize overhead.
- Load data via the clickhouse-client utility with CSV or Native format, which is faster than inserting one record at a time.
- You can use the INSERT INTO ... SELECT function from external tables or files.
- Configure ClickHouse to accept data using streaming mechanisms (e.g., via Kafka).
- Optimize the table structure: use an appropriate engine (e.g., MergeTree), properly configure partitioning and indexes.
Example of fast loading via clickhouse-client:
clickhouse-client --query="INSERT INTO my_table FORMAT CSV" < big_data.csv
Also, ensure that the ClickHouse server has sufficient resources (CPU, RAM, disk) and is configured for high load.