[rrd-users] Re: Maximum Argument Length?

[Tobias Oetiker]

Today you sent me mail regarding [rrd-users] Re: Maximum Argument Length?:

*> Alex van den Bogaerdt <alex at slot.hollandcasino.nl> writes:
*> 
*> > Perhaps I missed something but what is wrong with:
*> 
*> I probably did a poor job explaining what I'm actually 
*> doing currently:
*> 
*> [standard graph defs]
*> .
*> .
*> DEF:in1=1.ports.rrd:ds0:AVERAGE 
*> DEF:mx1=1.ports.rrd:ds0:MAX
*> DEF:in2=2.ports.rrd:ds0:AVERAGE 
*> DEF:mx2=2.ports.rrd:ds0:MAX
*> DEF:in3=3.ports.rrd:ds0:AVERAGE 
*> DEF:mx3=3.ports.rrd:ds0:MAX
*> DEF:in4=4.ports.rrd:ds0:AVERAGE 
*> DEF:mx4=4.ports.rrd:ds0:MAX
*> DEF:in5=5.ports.rrd:ds0:AVERAGE 
*> DEF:mx5=5.ports.rrd:ds0:MAX
*> .
*> .
*> .
*> DEF:in282=282.ports.rrd:ds0:AVERAGE 
*> DEF:mx282=282.ports.rrd:ds0:MAX
*> CDEF:tin=in1,in2,+,in3,+,in4,+,in5....in282,+
*> CDEF:tmx=mx1,mx2,+,mx3,+,mx4,+,mx5....mx282,+
*> 
*> That's how I'm currently doing it... It gets those values
*> from 282 data sources 2 times.  I'm not sure the internals
*> to the data base but it would be cool to be able to maybe
*> do a DEF:(min1,avg1,max1)=your.rrd:ds0:MIN,AVERAGE,MAX
*> That would save a redundant lookups.
*> 
*> Anyway, my original concern is should I continue to read those
*> DS dynamically to build a global graph or perhaps should I start
*> thinking of maintaing a rrd that sums all the parts and updates
*> into  the global rrd?

as I said, as long as there is not performance issue for you, rrdtool shoud
be able to handle arbitrary length arguments ... 

cheers
tobi
*> 
*> Regards,
*> 

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