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

Rick Jones rick.jones2 at hp.com
Tue Jun 26 18:45:53 CEST 2012

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?

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
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