ClickHouse/dbms/tests/integration/test_non_default_compression/configs/custom_compression_by_default.xml

<yandex>
    <compression>
        <case>
            <!-- Conditions. All must be satisfied simultaneously. Some conditions may not be specified. -->
            <min_part_size>10000</min_part_size>         <!-- The minimum size of a part in bytes. -->
            <!-- Which compression method to choose. -->
            <method>lz4hc</method>
            <level>10</level>
        </case>
        <case>
            <!-- Conditions. All must be satisfied simultaneously. Some conditions may not be specified. -->
            <min_part_size>100000</min_part_size>         <!-- The minimum size of a part in bytes. -->
            <!-- Which compression method to choose. -->
            <method>zstd</method>
            <level>20</level>
        </case>
    </compression>
</yandex>