well, maybe because I didn't know I could do that with rrdtool :)
On Jan 8, 2008, at 8:36 AM, Jesse Becker wrote:
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
Doug Nordwall
Unix Administrator
EMSL Computer and Network Support
Unclassified Computer Security
Phone: (509)372-6776; Fax: (509)376-0420
The best book on programming for the layman is "Alice in Wonderland";
but that's because it's the best book on anything for the layman.
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