[rrd-users] Question about the historical complaint about irregular data gone missing

Simon Hobson linux at thehobsons.co.uk
Tue Dec 22 16:25:50 CET 2009

John Allspaw wrote:

>"The first reason is that RRD is designed under the assumption that 
>data will always be inserted into the database on a regular basis, 
>and this assumption causes RRD behave undesirably when given 
>irregularly occurring data.

Not true. Yes, RRD is designed on the assumption that you will feed 
it data on a fairly continuous basis, but what 'fairly continuous' 
actually means is largely down to how you define your database. There 
are also some workarounds for when you do genuinely only feed it 
intermittent data.

It IS true that RRD was designed for a specific pattern of use, and 
it's well known that it's not the ideal tool for all projects..

>Is this still the case? IIRC, missing data due to irregularity isn't 
>an issue, given the right resolution in the definitions, right?

There have been recent threads on this subject - the general design 
goals of RRD have not changed.

Simon Hobson

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