On Jan 4, 2008 1:10 PM, Douglas Nordwall <[EMAIL PROTECTED]> wrote: > I'm in a situation where I have some metrics that could potentially be > computed from existing data. For instance, "disk_used" could be computed > from disk_total and disk_free. It seems to me to be a little silly to have > each of my nodes calculate it and send it along when i could have the master > gmond (I'm looking at deaf nodes-> master) compute it up for me, since all > he's really doing is managing this sort of thing.
Since the data is calculated, why bother storing it at all? Just have rrdtool compute the values when generating the charts. (untested, but you get the idea) rrdtool graph diskused.png -v 'Disk used' DEF:total:disk_total.rrd:disk_total:AVERAGE DEF:free:disk_free.rrd:disk_free:AVERAGE CDEF:used:total,free,- LINE2:total#ee0000:Total LINE1:free#0000ee:Free LINE1:used#00ee00:Used Should plot three lines: a red "total", and the used and free values in blue and green respectively. -- Jesse Becker GPG Fingerprint -- BD00 7AA4 4483 AFCC 82D0 2720 0083 0931 9A2B 06A2 ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
