ClickHouse/tests/integration/test_rocksdb_options/configs/rocksdb.xml

<?xml version="1.0" encoding="utf-8"?>
<clickhouse>
  <rocksdb>
    <options>
        <max_background_jobs>8</max_background_jobs>
    </options>
    <column_family_options>
      <num_levels>2</num_levels>
    </column_family_options>
    <block_based_table_options>
      <block_size>1024</block_size>
    </block_based_table_options>
    <tables>
      <table>
        <name>test</name>
        <options>
          <max_open_files>10000</max_open_files>
        </options>
        <column_family_options>
          <max_bytes_for_level_base>14</max_bytes_for_level_base>
        </column_family_options>
        <block_based_table_options>
          <format_version>5</format_version>
        </block_based_table_options>
      </table>
    </tables>
  </rocksdb>
</clickhouse>