[rrd-users] [rrd-developers] RRD + Step in milliseconds

[Tobias Oetiker]

Hi Rick,

Today Rick Jones wrote:

> On 06/26/2012 06:46 AM, Tobias Oetiker wrote:
> > Hi Michael,
> >
> > I am not aware of such an extension, but changes might actually not
> > be all that difficult ...
> >
> > I guess turning the step parameter from seconds into milli seconds
> > would be all that is required ... there would still be enough
> > head-room above
> >
> > unfortunately such an extension would require a change in rrdtool
> > data format which makes it difficult to fold this back into
> > mainline ... but for your research the patch should be fairly
> > simple ...
>
> If the units for step were reduced to milliseconds, wouldn't it also be a good
> idea to extend the allowed data input timestamp from milliseconds to
> microseconds?

I would try to keep step and precision in sync, the curent solution
is already a hack, no need preserving that if you modify things
anyway ... go down to microsecond step precision then ...

cheers
tobi

>
> rick jones
>
> >
> > cheers
> > tobi
> >
> >
> > Today MLjubich at gmx.net wrote:
> >
> > > Hello,
> > >
> > > I am researching rrd-[developers|users] archives whether someone have
> > > done the extension of the RRD tool for milliseconds/sub-second stepping
> > > (e.g., --step 500ms) in the past?
> > >
> > > To date I found some mail threads with references to the subject but
> > > without an explicit success mark.
> > >
> > > Using this sub-second extension, I want to research mechanical gearboxes
> > > installed on remote sites in the field collecting the analogue data from
> > > gearbox' sensors in an RRA over 1 year via site local network. A gearbox
> > > aggregate has something like 150 data sources. (~50) of them need to be
> > > recorded with 100ms step. The system, I have in mind should work
> > > off-line/autonomously.
> > >
> > > With best regards,
> > >
> > > Michael
> > >
> > > _______________________________________________
> > > rrd-developers mailing list
> > > rrd-developers at lists.oetiker.ch
> > > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers
> > >
> > >
> >
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900