```
ubuntu@ip-172-31-79-147:/opt/downloads$ clickhouse-local --max_threads 8 --query "WITH parseDateTimeBestEffort(extract(_path, 'pageviews-([\\d\\-]+)\\.gz$')) AS time, splitByChar(' ', line) AS values, splitByChar('.', values[1]) AS projects SELECT time, projects[1] AS project, projects[2] AS subproject, values[2] AS path, (values[3])::UInt64 AS hits FROM file('pageviews*.gz', LineAsString) WHERE length(values) >= 3" | pv > /dev/null
^C01GiB 0:01:08 [ 129MiB/s] [                                                                                                                                                                   <=>                                                                                    ]

ubuntu@ip-172-31-79-147:/opt/downloads$ clickhouse-local --max_threads 8 --query "WITH parseDateTimeBestEffort(extract(toLowCardinality(_path), 'pageviews-([\\d\\-]+)\\.gz$')) AS time, splitByChar(' ', line) AS values, splitByChar('.', values[1]) AS projects SELECT time, projects[1] AS project, projects[2] AS subproject, values[2] AS path, (values[3])::UInt64 AS hits FROM file('pageviews*.gz', LineAsString) WHERE length(values) >= 3" | pv > /dev/null
^C46GiB 0:00:48 [ 175MiB/s] [                                                                                                                                                                                                                                        <=>               ]
```

context,
            format_settings,
            compression_method,
            client,
            partition_bucket,
            partition_key,
            min_upload_part_size,
            max_single_part_upload_size
        );
    }
private:
    const String format;
    const Block sample_block;
    ContextPtr context;
    const CompressionMethod compression_method;
    std::shared_ptr<Aws::S3::S3Client> client;
    const String bucket;
    const String key;
    size_t min_upload_part_size;
    size_t max_single_part_upload_size;
    std::optional<FormatSettings> format_settings;
    ExpressionActionsPtr partition_by_expr;
    static void validateBucket(const String & str)
    {
        S3::URI::validateBucket(str, {});
        if (!DB::UTF8::isValidUTF8(reinterpret_cast<const UInt8 *>(str.data()), str.size()))
            throw Exception(ErrorCodes::CANNOT_PARSE_TEXT, "Incorrect non-UTF8 sequence in bucket name");
        validatePartitionKey(str, false);
    }
    static void validateKey(const String & str)