Method copyFileToDisk

src/Backups/BackupIO_Disk.cpp:37–57

}

void BackupReaderDisk::copyFileToDisk(const String & path_in_backup, size_t file_size, bool encrypted_in_backup,
                                      DiskPtr destination_disk, const String & destination_path, WriteMode write_mode)
{
    /// Use IDisk::copyFile() as a more optimal way to copy a file if it's possible.
    /// However IDisk::copyFile() can't use throttling for reading, and can't copy an encrypted file or do appending.
    bool has_throttling = disk->isRemote() ? static_cast<bool>(read_settings.remote_throttler) : static_cast<bool>(read_settings.local_throttler);
    if (!has_throttling && (write_mode == WriteMode::Rewrite) && !encrypted_in_backup)
    {
        auto destination_data_source_description = destination_disk->getDataSourceDescription();
        if (destination_data_source_description.sameKind(data_source_description) && !data_source_description.is_encrypted)
        {
            /// Use more optimal way.
            LOG_TRACE(log, "Copying file {} from disk {} to disk {}", path_in_backup, disk->getName(), destination_disk->getName());
            disk->copyFile(root_path / path_in_backup, *destination_disk, destination_path, read_settings, write_settings);
            return; /// copied!
        }
    }

    /// Fallback to copy through buffers.
    BackupReaderDefault::copyFileToDisk(path_in_backup, file_size, encrypted_in_backup, destination_disk, destination_path, write_mode);
}


BackupWriterDisk::BackupWriterDisk(const DiskPtr & disk_, const String & root_path_, const ReadSettings & read_settings_, const WriteSettings & write_settings_)