[rrd-users] Re: RRDtool "GMT-centric" problem?

[Tobias Oetiker]

Today you sent me mail regarding [rrd-users] RRDtool "GMT-centric" problem?:

*> 
*>  > From: me
*>  > ...these are consolidated data points (CDPs).  They are the result of
*>  > "normalizing" your PDPs (at around 22:55 CST) so that they fit into
*>  > time slots (at around 18:00 CST) defined by your RRAs.
*>  >  
*>  >  Third PDP sez there was an "average" 31 pages during Jan 3 22:55
*>  > through Jan 4 22:55 CST; whereas the third CDP above sez that there was
*>  > an average of 25.06 pages during Jan 3 18:00 through Jan 4 18:00 CST.
*> 
*> If I want to graph "web hits per (localtime) day", I end up with
*> "web hits per (GMT) day".
*> 
*> Is there a work-around for this??  It seems that I could add data
*> every hour and generate "daily looking" graphs, but that involves a
*> 24x increase in the amount of data stored.
*> 
*> It would be really nice to be able to somehow specify that CDP slots
*> should be aligned at arbitrary times.  For example, I'd like to do
*> "rrdtool create" with a step of one day and the CDPs aligned at
*> midnight localtime.

Sort of like an initial offset for the database ? This could certainly be
implemented ... it would require a change of rrd format though ... this
means I will save this for the 1.1 series ... but keep it in mind, because I
hope we will be able to have only ONE change of dataformat ... at the moment
my plans are to incorporate sub second intervals and probably this offset
thing ... 

cheers
tobi
*> 
*> later
*> steve
*> - - -
*> systems guy
*> wiscnet.net
*> 
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