[rrd-users] Re: Two independent Y-axis scales

[Robert Nelson]

> i.e. at .90sec, it records a 3. At 1.40s, it records a 2. The value is 
> apparently stored at 1.00s, so it writes down the value 2.89 or something 
> similar. I tried using LAST as well as AVERAGE for the rrd creation, but I 
> seem to get the same results. Is there a way to store results as integers or 
> to round to integers before displaying?

I should probably include the rrdcreation info :)

It's created through nagiostat, but I think it simply prepends "/path/to/rrdtool create <filename specified later> <info below>

--step 300 
DS:rssi:GAUGE:600:0:2500 
DS:jitter:GAUGE:600:0:15 
RRA:AVERAGE:0.5:1:396 
RRA:AVERAGE:0.5:7:336 
RRA:AVERAGE:0.5:24:480 
RRA:AVERAGE:0.5:290:480


I've also tried this with LAST instead. Here's the graph function, which is called as "/path/to/rrdtool graph <info below>"

--start $s
--end $e
-X 0
-h 200
-u 2500
-t \"Canopy CSM RSSI & Jitter\"
DEF:rssi=$f:rssi:AVERAGE
DEF:jitter=$f:jitter:AVERAGE
CDEF:jit=jitter,167,*
LINE1:rssi#00A000:\"RSSI\" 
GPRINT:rssi:MIN:\"Minimum\\: %.4lg\"
GPRINT:rssi:MAX:\"Maximum\\: %.4lg\"
GPRINT:rssi:LAST:\"Current\\: %.4lg\"
COMMENT:\"\\n\"
LINE2:jit#0000D0:\"Jitter\"
GPRINT:jitter:AVERAGE:\"Average\\: %.4lg\" 
GPRINT:jitter:LAST:\"Current\\: %.4lg\" 
COMMENT:\"                   Generated on \`date\`\"



Because it comes from a doubly-parsed file, it has a lot of escape characters... Also, it's all on one line in the file, and the graphs do display, I just broke it up for easier readability.

Rob Nelson


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