Hi,
A user log file is saved in a log directory (for example, the log or logfile directory) and named in the log.log format.
A diagnostic log file is saved in a log directory (for example, the log or logfile directory) and named in the log.dblg format.
For details, please refer to:
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100101074&id=EN-US_CLIREF_0177114178&lang=en