Great. We have a database that cannot be edited :) Thank you RRD! On Fri, Jun 1, 2012 at 3:47 PM, Simon Hobson <li...@thehobsons.co.uk> wrote:
> >I need to update an rrd at a specific time > >stamp. Whatever timestamp I give is rejected > >with: > >ERROR: file.rrd: illegal attempt to update using > >time 1338480000 when last update time is > >1338546901 (minimum one second step) > > > [Digital^Dude] ® wrote: > >I want to update these two values: > > > >1338480000: -3.0293609367e+06 > >1338480300: -2.0135146667e+04 > > > >to ZERO. > > > Top posting fixed ... > > Simple, you cannot do this. > You can **NEVER** go back in time with RRD. Once > you apply an update at any time, then you can > never submit an update for an earlier time. > When you do an update, several things happens : > > 1) RRD will to the necessary calculations to work > out the rate from the previous update to this one. > > 2) If the new time is such that one or more steps > or consolidated periods are now complete, then > these will have data entered for them. > > 3) Any data (such as previous update values) not > now needed to do the same calculations next time > are discarded. The last update values are kept as > they will (in most cases) be needed to do the > same calculations at the next update. > > > There are only two ways to go back and submit new data : > > 1) Delete your database, create a new one, and > re-enter all data. This means keeping all your > data somewhere outside of RRD so you can change > values and resubmit them - in chronological order. > > 2) You can dump the RRD to an XML file and edit > the values before reading the XML into a new RRD > file. > > In theory it would be possible to directly edit > the RRD file, but there are no tools for that. > You could also just dump the data with "rrd > fetch" - but then you'd need to do some work to > select which data to use, potentially do some > interpolation, and then stuff it back into a new > RRD with a series of updates. Potentially a lot > of work, and again, no tools for it. > > -- > Simon Hobson > > Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed > author Gladys Hobson. Novels - poetry - short stories - ideal as > Christmas stocking fillers. Some available as e-books. > > _______________________________________________ > rrd-users mailing list > rrd-users@lists.oetiker.ch > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users >
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