Sorry Alex, forgot the list as recipient... ;-)
* GROW each RRA like rrdresize by a new format definition.
Explain "by a new format definition".
1st step: Only more rows in the past (like rrdresize):
* RRA 0/1/2: 576 rows -> 1584 rows (+1008 rows at the beginning)
* RRA 3/4/5: xxx rows -> xxxx rows (+xxx rows at the beginning)
* ...
* Import old (deleted) data from another (dumped) RRD file.
This works great, but I'm not sure what to do with the "cdp_prep"
XML node, especially with the *value elements. Am I supposed to leave
it unchanged (the rrdresize way), delete the whole node or change it
to another value?
Rrdtool resize adds rows to the past of the data. It does not do
anything with the present time where the current CDP is being built.
If your version is doing something to the data (e.g. change amount of
time per CDP) then you should change cdp_prep accordingly. If not,
not.
2nd step: Import some data into the added rows. The current rows (=
existing ones) are not touched. Is this problematic too?
If you don't know how CDPs are built, may I suggest you visit my site
( http://rrdtool.vandenbogaerdt.nl ) and also look in the source code
of rrdtool.
Thanks, I'll take a look at this too.
--
With kind regards,
Christian Schrötter
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