[rrd-users] rrd graph start/end times with DEF start/end times

[Jack Tavares]

I am upgrading to the 2.28 (from a very old version) and I see that
the DEF statement not has start and end time specifications.
 
I would like to use this to generate multiple MAXIMUM over different time periods 
using PRINT and one call to rrd graph.
 
 
For intance: 
 
I save a statistic in several differend RRAs in one RRDFILE.
 
I want the MAXIMUM value over the last 3 hours, the last 24 hours etc.
 
It looks like I could, in the def commands specify something like
 
DEF:stat3hours=/rrddir/rrdfil:stat:AVERAGE:step=blah:start=<now-3hours>:end=<now>
DEF:stat24hours=/rrddir/rrdfil:stat:AVERAGE:step=blah:start=<now-24hours>:end=<now>
 
Then use the following VDEFS
VDEF:stat3hoursMax=stat3hours,MAXIMUM
VDEF:stat24hoursMat=stat24hours,MAXIMUM
 
Then the PRINT statements
PRINT:stat3hoursMax:"3 hour MAX: %8.4lf"
PRINT:stat24hoursMax:"24 hour MAX: %8.4lf"
 
My questions are
 
0. Can I request different start/end times for the same DS in multiple DEF statements in one command?
1. If so, do I need to specify a start and end time for the as an argument to the graph command?
 
Thanks
 
 
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