[rrd-users] Re: indicate collector down on graph

[rader at ginseng.hep.wisc.edu]

 > >> You must enter some value, like 0 or -1 when you get a timeout.
 > >> When the collector is down, you already get a NaN.
 > >>
 > >> Then you must have the appropriate logic in rrdgraph to
 > >> handle those values.
 > >
 > > But if I try to put a -1 or 0 in, won't it get normalized and get hard
 > > to detect by rrdgraph?
 > >
 > Then put in -10e10, that should be significant enough :-)
 > 
 > But seriously, if your collector is down so often it is a problem, what is
 > the usefullnes of the monitoring? Better fix that problem instead of 
 > patching around it.

Ah, some might argue: If collection works 99.999% of the time,
then graphs that show that collection failed are *especially*
useful.

The rrdtool graph magic is something like

 CDEF:down=rtt,0,LE,INF,UNKN,IF
 AREA:down#ff000
 CDEF:nodata=rtt,UN,INF,UNKN,IF
 AREA:nodata#ffff0

steve 
- - - 
systems & network manager
high energy physics
university of wisconsin

--
Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-users-request at list.ee.ethz.ch?subject=help
Archive     http://lists.ee.ethz.ch/rrd-users
WebAdmin    http://lists.ee.ethz.ch/lsg2.cgi