Karl, rrdtool does not 'know' so the best you can do is to search for it ... maybe (!!!) some clever CDEF/VDEF can be constructed to return this result via graph:PRINT or XPORT. Otherwhise you have to fetch the data and then analyze it in an external script ... the whole process will be largely disk-io-bound, hence the way you implement this will not have a bif effect.
cheers tobi Today Karl Fischer wrote: > > Hello, > > since there was no answer to my last post, I'm trying again. > Where are the experts? > > Is there a good way to find the first valid (not UNKN) datapoint in rrd? > > rrdtools first doesn't quite do what I expected. > Instead it gives you "rrdtools last" - rrasize. > > Example: > > --step=1 > DS:loadavg:GAUGE:10:0:U > RRA:AVERAGE:0.5:1:259200 # 3 days > RRA:AVERAGE:0.5:10:259200 # 30 days > RRA:AVERAGE:0.5:60:259200 # 180 days > RRA:AVERAGE:0.5:600:259200 # 1800 days > > If I have created a rrd like this and I started to use it a week ago, > I'm looking for a way to find out when that fist value was entered > into the rrd. Instead of telling me the first 'valid' DP in that rrd, > "rrdtools first file.rrd" tells me 'now - 3 days' and > "rrdtools first file.rrd --rraindex 3" tells me 'now - 1800 days' > What I would like to get is that point in time a week ago when I > entered the first value. > > any ideas? > > many thanks > > - Karl > > _______________________________________________ > rrd-users mailing list > [email protected] > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch [EMAIL PROTECTED] ++41 62 775 9902 / sb: -9900 _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
