> I want to add data in the past but cannot figure how to do so. As Simon pointed out, you cannot do this, by design. RRDTool performs continuous consolidation of data which would not be possible were you able to add data in the past.
If you have a large amount of historical data to add in one go, then you could do it by creating a separate RRD file for this new data, then using an RRD merge function to merge the two together. I have an rrdmerge script in the 'extras' directory of the Routers2 software distribution you can use, and several other people have also created merge scripts; I think Tobi has added merge functionality into the RRDTool 1.5 branch as well now. This is not ideal, though, as you still get a hiccup in RRA items which overlap both sets, and you need to pick which RRD to use for which time window. Steve Steve Shipway T: +64 9 3737 599 ext 86487 E: [email protected]
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