[rrd-users] Slow-changing GAUGE question

[Kimball, Conrad]

Hello.  I'm developing some scripts to use rrdtool to monitor usage of
our software licenses.  I have two GAUGE DS's, one that records the
number of licenses in use and another that records the number of
licenses installed on the license server.  The in-use license counts are
quite dynamic, as one might expect, so using rrdtool to record
once-a-minute snapshots of them is quite natural.  The installed license
counts are rather the oppositive though - we add or remove licenses
every month or so.

Currently I am recording once-a-minute snapshots of both the installed
and the in-use counts so I can easily use rrdtool graphing to plot both
values on the same chart.  It works, but because the installed license
count changes infrequently the data points in the installed license DS
is extremely redundant, consuming a lot of disk space, etc.

Does anybody have a better idea about how to collect and plot both
slowly- and rapidly-changing values?

Conrad Kimball
Associate Technical Fellow
Client Server IT Services, Shared Services Group
conrad.kimball at boeing.com P.O.Box 24346, MS 7M-HC Seattle, WA
98124-0346 Bellevue 33-12 bldg, cube 37C3
Phone: (425) 865-6410
Pager:  (206) 797-3112
Cell:      (425) 591-7802

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