storage.xml

        <clickhouse>
          <storage_configuration>
            <disks>
              <!-- Disk with single endpoint for all replicas. -->
              <s3_disk>
                <type>s3</type>
                <endpoint from_env="AWS_S3_DISK_URL"/>
                <metadata_path>/var/lib/clickhouse/disks/s3_disk/</metadata_path>
                <use_environment_credentials>1</use_environment_credentials>
              </s3_disk>
              <!-- Disk with separate endpoint for each replica. -->
              <s3_disk_with_replica>
                <type>s3</type>
                <endpoint from_env="AWS_S3_DISK_WITH_REPLICA_URL"/>
                <metadata_path>/var/lib/clickhouse/disks/s3_disk_with_replica/</metadata_path>
                <use_environment_credentials>1</use_environment_credentials>
              </s3_disk_with_replica>
              <!-- Disk with single endpoint for each shard. -->
              <s3_zero_copy>
                <type>s3</type>
                <endpoint from_env="AWS_S3_ZERO_COPY_URL"/>
                <metadata_path>/var/lib/clickhouse/disks/s3_zero_copy/</metadata_path>
                <use_environment_credentials>1</use_environment_credentials>
              </s3_zero_copy>
              <!-- Local disk cache -->
              <s3_disk_cache>
                <type>cache</type>
                <disk>s3_disk_with_replica</disk>
                <path>/var/lib/clickhouse/s3_disk_cache/cache/</path>
                <max_size>100Gi</max_size>
                <cache_on_write_operations>1</cache_on_write_operations>
              </s3_disk_cache>
            </disks>
            <policies>
              <!-- S3-backed MergeTree with single endpoint, no disk cache -->
              <s3_disk_policy>
                <volumes>
                  <main>
                    <disk>s3_disk</disk>
                  </main>
                </volumes>
              </s3_disk_policy>
              <!-- S3-backed MergeTree with an endpoint for each replica, no disk cache -->
              <s3_disk_with_replica_policy>
                <volumes>
                  <main>
                    <disk>s3_disk_with_replica</disk>
                  </main>
                </volumes>
              </s3_disk_with_replica_policy>
              <!-- S3-backed MergeTree with disk cache -->
              <s3_disk_cached_policy>
                <volumes>
                  <main>
                    <disk>s3_disk_cache</disk>
                  </main>
                </volumes>
              </s3_disk_cached_policy>
              <!-- Block storage tiered with S3-backed MergeTree -->
              <s3_tiered_policy>
                <volumes>
                  <default>
                    <disk>default</disk>
                    <move_factor>0.1</move_factor>
                  </default>
                  <s3_disk_cached>
                      <disk>s3_disk_cache</disk>
                      <prefer_not_to_merge>true</prefer_not_to_merge>
                      <perform_ttl_move_on_insert>false</perform_ttl_move_on_insert>
                  </s3_disk_cached>
                </volumes>
              </s3_tiered_policy>
              <!-- S3-backed MergeTree with zero-copy replication -->
              <s3_zero_copy_policy>
                <volumes>
                  <main>
                    <disk>s3_zero_copy</disk>
                  </main>
                </volumes>
              </s3_zero_copy_policy>
            </policies>
          </storage_configuration>
        </clickhouse>