How can you reduce log verbosity?

[kwinz]

Currently every single packet gets logged to syslog and to daemon.log creating multiple MB of logfiles per day.

For example:

May 17 11:01:12 pi4-imst2 ttn-gateway[410]: ##### 2023-05-17 09:00:12 GMT #####
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: ### [UPSTREAM] ###
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # RF packets received by concentrator: 6
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # CRC_OK: 83.33%, CRC_FAIL: 16.67%, NO_CRC: 0.00%
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # RF packets forwarded: 5 (120 bytes)
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # PUSH_DATA datagrams sent: 6 (1434 bytes)
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # PUSH_DATA acknowledged: 100.00%
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: ### [DOWNSTREAM] ###
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # PULL_DATA sent: 3 (100.00% acknowledged)
May 17 11:01:12 pi4-imst2 ttn-gateway[410]: # PULL_RESP(onse) datagrams received: 0 (0 bytes)
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: # RF packets sent to concentrator: 0 (0 bytes)
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: # TX errors: 0
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: ### [GPS] ###
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: # Invalid gps time reference (age: 1684314012 sec)
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: # Manual GPS coordinates: latitude <>, longitude <>, altitude 425 m
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: ##### END #####
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 13 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 11 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 13 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [down] for server mux.openiot.network PULL_ACK received in 12 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 16 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 12 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 10 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [down] for server mux.openiot.network PULL_ACK received in 12 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 17 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [down] for server mux.openiot.network PULL_ACK received in 18 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: INFO: [up] PUSH_ACK for server mux.openiot.network received in 13 ms
May 17 11:01:13 pi4-imst2 ttn-gateway[410]: ##### 2023-05-17 09:01:12 GMT #####

Is there any way to only log WARNINGs and ERRORs ?

[schulti]

You can use the syslog facility to filter messages.
On a Raspberry I would suggest avoiding many I/Os anyway, maybe remote logging is an option.