On Sun, 17 April 2011 lanas <[email protected]> wrote: > On Sun, 17 Apr 2011 15:49:41 lanas <[email protected]> wrote : > > > Are there examples around for quickly graphing the out put of some > > plugin modules (such as CPU) without having to use a web server (as > > shown in first steps). Simply producing a (some) graphic > > file(s) from the files in cpu-0 directory for instance, to get a feel > > about how it works and how collectd resulting data is worked with > > rddtool. > > I've found that rrdtool info must be used first to get some names from > a rrd file set up by collectd.
You don't have to if you know in advance how the RRD file(s) is/are defined. > ... > > I presume the name 'value' refers to the actual values received from > the system where collectd run as a client (with the cpu module plugin). > > A rrdtool fetch command would show the time stamps where values are > found. These time stamps can be used to narrow a graph. > > So now a very simple graph can be made using: > > /opt/rrdtool-1.4.5/bin/rrdtool graph cpuidlevalues.png \ > --start 1303068900 --end 1303069810 \ > DEF:cpuidlevalues=cpu-idle.rrd:value:AVERAGE \ > LINE2:cpuidlevalues#FF0000 > > Maybe all collectd plugins are using the name 'value'. Or maybe > 'rddtool info' has to be run on every rrd file generated by collectd. I > certainly haven't looked at all documentation, but the cpu plugin > documentation does not seem to mention that the ds-name keyword 'value' > is used. Look at collectd's types.db file for that names used for data series in RRD files! That's the file based on which collectd instructs rrdtool to generate the RRD files. Bruno _______________________________________________ collectd mailing list [email protected] http://mailman.verplant.org/listinfo/collectd
