v.25.8Improvement

Support compressed

Official CH changelog text
Support compressed .metadata.json file via iceberg_metadata_compression_method setting. It supports all clickhouse compression methods. This closes #84895. #85196 (Konstantin Vedernikov).
Support for compressed .metadata.json files in Iceberg tables using the iceberg_metadata_compression_method setting, compatible with all ClickHouse compression methods.

Why it matters

This feature allows users to store Iceberg table metadata files in a compressed format, reducing disk space usage and potentially improving I/O performance by leveraging ClickHouse's existing compression algorithms.

How to use it

Set the iceberg_metadata_compression_method setting to any supported ClickHouse compression method when working with Iceberg tables. This will enable compression of the .metadata.json files automatically.

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