RRDTool - data sampling based on several RRD'S

Is it possible to obtain data using RRDTool based on several RRD databases, for example, obtaining values โ€‹โ€‹that are the sum of all the values โ€‹โ€‹associated with each RRD?

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the fetch function only works with one rrd at a time, but in a graph and xport you can extract data from several rrd files. You can then mix and match them with the contents of your hearts using CDEF and VDEF. I just want data and not grpah, just use PRINT to get the data.

NTN toby

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Source: https://habr.com/ru/post/1303555/


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