I was thinking of an external tool not an oh feature.
But I finally found [Persistence] Tool to fetch data from a persistence service and put it into an RRD4J type file on the forum after a few tests it seems to do what I want.
I was thinking of an external tool not an oh feature.
But I finally found [Persistence] Tool to fetch data from a persistence service and put it into an RRD4J type file on the forum after a few tests it seems to do what I want.