[rrd-users] Post to individual data sources with multiple update requests

Sandy Breeze sandy.breeze at eu.clara.net
Thu Oct 17 23:17:45 CEST 2013

Steve's right.  Separate RRD's would be the way forward to ensure DS consistency.  As a suggestion, why not write something which scrapes these RRD's periodically and collates the last DS value and drops it into a single RRD with multiple DS's…?

I've always found RRDTool::OO to be particularly friendly

From: Steve Shipway <s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>>
Date: Thursday, 17 October 2013 21:22
To: 'Patrik Åkerfeldt' <patrik.akerfeldt at gmail.com<mailto:patrik.akerfeldt at gmail.com>>, "'rrd-users at lists.oetiker.ch<mailto:'rrd-users at lists.oetiker.ch>'" <rrd-users at lists.oetiker.ch<mailto:rrd-users at lists.oetiker.ch>>
Subject: Re: [rrd-users] Post to individual data sources with multiple update requests

>I would like to have one RRD file with all my indoor temperatures. One DS per room. My problem
>is that I receive temperature updates as individual events, thus I would like to update the DS's in
>the RRD file with individual update calls.

For this application, you need to have separate RRD files.  You can still make a single graph holding data from multiple files; however since the data are coming in at different points in time, and you cannot add a vector to the RRAs until you have all the elements, you should have one RRD per sample.


Steve Shipway
ITS Unix Services Design Lead
University of Auckland, New Zealand
Floor 1, 58 Symonds Street, Auckland
Phone: +64 (0)9 3737599 ext 86487
DDI: +64 (0)9 923 6487
Mobile: +64 (0)21 753 189
Email: s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>
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