```
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] [                                                                                                                                                                                                                                        <=>               ]
```

{
    const std::string path(disk->getPath() + relative_data_path);
    fs::create_directories(path);
    std::filesystem::directory_iterator begin(path);
    std::filesystem::directory_iterator end;
    for (auto it = begin; it != end; ++it)
    {
        const auto & dir_path = it->path();
        if (std::filesystem::is_directory(dir_path))
        {
            const auto & tmp_path = dir_path / "tmp";
            
            if (std::filesystem::is_directory(tmp_path) && std::filesystem::is_empty(tmp_path))
                std::filesystem::remove(tmp_path);
            if (std::filesystem::is_empty(dir_path))
            {
                LOG_DEBUG(log, "Removing {} (used for async INSERT into Distributed)", dir_path.string());
                
                std::filesystem::remove(dir_path);
            }
            else
            {
                requireDirectoryMonitor(disk, dir_path.filename().string(),  true);
            }
        }
    }
}
StorageDistributedDirectoryMonitor& StorageDistributed::requireDirectoryMonitor(const DiskPtr & disk, const std::string & name, bool startup)