v.23.5Improvement

Support for Erasure Codes in HDFS

Support for erasure codes in HDFS, author: @M1eyu2018, @tomscut. #48833 (M1eyu).
Add support for erasure codes in HDFS storage engine within ClickHouse.

Why it matters

This feature enables ClickHouse users to leverage erasure coding capabilities of HDFS, improving data durability and storage efficiency by reducing redundancy while maintaining fault tolerance.

How to use it

To use erasure codes with the HDFS engine, configure your HDFS cluster to use erasure coding and specify the appropriate erasure coding policy in the ClickHouse table settings connecting to HDFS.