Bruno, I'm fairly certain it's one of the four native aggregate functions used when creating an RRA. From the 'rrdcreate' man page:
"The data is also processed with the consolidation function (CF) of the archive. There are several consolidation functions that consolidate primary data points via an aggregate function: AVERAGE, MIN, MAX, LAST." The way I understand it, LAST is basically the last data point with no manipulation. It's not necessarily useful for graphing because it's rather spiky, but it's a good value for labels. Mark On Fri, Jul 27, 2012 at 3:18 PM, Bruno Prémont <[email protected]>wrote: > Hi Marc, > > On Fri, 27 July 2012 Mark <[email protected]> wrote: > > Hi all, > > We're trying to use collectd to front-end Cacti and I've just discovered > > that the RRDTool Plugin does MAX, MIN, AVERAGE, but doesn't store LAST. > > Most of our Cacti graphs use LAST to display the current value. Am I > > missing something obvious or is LAST just not supported? > > Isn't LAST just a special access to RRD's RRAs, as in always present? > > > Mark > > Bruno > > _______________________________________________ > collectd mailing list > [email protected] > http://mailman.verplant.org/listinfo/collectd >
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