pino-syslog is a so called "transport" for the pino logger. pino-syslog receives pino logs from stdin and transforms them into RFC3164 or RFC5424 (syslog) formatted messages which are written to stdout. The default output format is RFC5424.This means you can lose data if your log messages are too large. If that is to be the case, you should investigate the includeProperties option to reduce your log size. But, really, you should investigate what it is you are logging.