Hi everyone,
I'm looking for a way to calculate the peak value from multiple databases
(Backup
usage of different servers).
This is the setup:
20 databases, each of them type Gauge, cf is Avg with 210240 rows.
My graph looks fine, it is an area for the first database, the others are
stacked
on top. When I look at the graph, an overall backup usage of 6 TB is visible.
But this problem occurs:
I want a description line, which lists the largest value, calculated over all
databases.
DEF for each database is:
DEF:l${NR}=${DATAFILE}.rrd:ds1:AVERAGE where NR is 0..19
My CDEF is:
cdef:ctotal=${RPNCALC} where RPNCALC is each ds added (0,l0,+,l1+,l2...)
And then I vdef' it:
VDEF:vtotal=ctotal,MAXIMUM
On this point the graph and the commentline vary: I have a graph showing nearly
6
TB on it's highest peak, but the GPRINT gives me only 5,2 TB.
Does anyone have an idea where my mistake is?
Thanks,
Jan
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