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

directory_watch = std::make_unique<FileLogDirectoryWatcher>(root_data_path, *this, getContext());
        auto thread = getContext()->getSchedulePool().createTask(log->name(), [this] { threadFunc(); });
        task = std::make_shared<TaskContext>(std::move(thread));
    }
    catch (...)
    {
        if (!attach)
            throw;
        tryLogCurrentException(__PRETTY_FUNCTION__);
    }
}
void StorageFileLog::loadMetaFiles(bool attach)
{
    const auto & storage = getStorageID();
    root_meta_path
        = std::filesystem::path(getContext()->getPath()) / ".filelog_storage_metadata" / storage.getDatabaseName() / storage.getTableName();
    
    if (attach)
    {
        
        if (!std::filesystem::exists(root_meta_path))
        {
            
            LOG_ERROR(log, "Metadata files of table {} are lost.", getStorageID().getTableName());
        }
        
        deserialize();
    }
    
    else