[Observium] best practices regarding interface switching and historical data

Hi,

I was wondering how you guys tackle the problem of changing the port of (e.g. your transit uplink) to another physical port & historical data. Since rrd's are stored under "port-<snmpid>" format, this event causes you by default to loose your historical data. Or even worse, you have to change your routing engine with a more recent version, and after replacing it seems all your snmp id's are changed.

this is certainly of importance for our interfaces which have a label that automatically creates aggregates graphs.

How I do this until now is copying the rrd file to the new location, but this seems so... dirty

kind regards Arene