файл конфигурации rsyslogd (8) (rsyslogd(8) configuration file)
QUEUED OPERATIONS
Rsyslogd supports queued operations to handle offline outputs
(like remote syslogd's or database servers being down). When
running in queued mode, rsyslogd buffers messages to memory and
optionally to disk (on an as-needed basis). Queues survive
rsyslogd restarts.
It is highly suggested to use remote forwarding and database
writing in queued mode, only.
To learn more about queued operations, see the HTML
documentation.