[rrd-users] value and name both

[Tobias Oetiker]

Today Shabnam Shahreza wrote:

> Thanx a lot Tobi;
>
> I just got a chance to test it today...
>
> The output that I get from "PRINT" is perfect to be tested against the actual source files but when I check it with "rrdtool fetch ...." I can't find the match of it in any of the source dbs...

the trick is to print the result of a test you are doing inside rrd
graph ... each test a separate print ... if print is 1 you know the
stest succeeded.
cheers
tobi
>
> Example:
>
> Imagine this is one of the printed outputs which I got by using "AVERAGE 1" comparing file1/2/3:
>
> 	print[10] = "7.843519 \n"
>
> This search fails to show me which one of file1/2/3 has this value:
>
> rrdtool fetch -s -1y file1 AVERAGE 1 | grep 843519
> rrdtool fetch -s -1y file2 AVERAGE 1 | grep 843519
> rrdtool fetch -s -1y file3 AVERAGE 1 | grep 843519
>
> Even I dumped the output but still unable to locate the value....
>
> Is this due to some normalization or something? I'm not the one who created the db... I just need to analyze it...
>
> Shabnam Shahreza 
>
> -----Original Message-----
> From: Tobias Oetiker [mailto:tobi at oetiker.ch]
> Sent: Thursday, November 17, 2011 10:03 AM
> To: Shabnam Shahreza
> Cc: rrd-users at lists.oetiker.ch
> Subject: RE: [rrd-users] value and name both
>
> Shabnam,
>
> you can run rrdtool graph twice. the first time without actually
> creating a graph, just returning the results of your work via PRINT
> statements (use graphv).
>
> then in the second run you customize the arguments according to the
> first run ...
>
> since rrdtool spends most of its time 'waiting for data from the
> disk' and 'compressing the final chart' the performance impact will
> not be all that bad.
>
>
> cheers
> tobi
>
>
> > Any other work around?
> > Imagine this is going to be the maximum CPU-util of some servers and I want to graph the name of the server (source) that caused the highest peak in addition to the value ....
> >
> > -----Original Message-----
> > From: Tobias Oetiker [mailto:tobi at oetiker.ch]
> > Sent: Thursday, November 17, 2011 9:38 AM
> > To: Shabnam Shahreza
> > Cc: rrd-users at lists.oetiker.ch
> > Subject: RE: [rrd-users] value and name both
> >
> > Today Shabnam Shahreza wrote:
> >
> > > But it still gives me the "value" not the "name of the variable carrying that value"... right?
> > >
> > > Imagine if the maximum value is 100.05 I want to know also which
> > > of the var1,var2,var3,.. has this value....
> >
> > you do
> >
> > var1,max,eq,
> >
> > but the problem is even if you knew, you could not do all that much
> > with the information as you can not generate text output using CDEF
> >
> > cheeers
> > tobi
> >
> > >
> > > -----Original Message-----
> > > From: Tobias Oetiker [mailto:tobi at oetiker.ch]
> > > Sent: Thursday, November 17, 2011 9:27 AM
> > > To: Shabnam Shahreza
> > > Cc: rrd-users at lists.oetiker.ch
> > > Subject: Re: [rrd-users] value and name both
> > >
> > > Hi Shabnam,
> > >
> > > you could do it using multiple CDEF expressions, using the IF
> > > function, looking at each var in turn, comparing it with the
> > > maximum earlier found.
> > >
> > > cheers
> > > tobi
> > >
> > > Today Shabnam Shahreza wrote:
> > >
> > > > Since I got no answer on this should I consider that this can't be done at all?
> > > > I mean along with the values to draw the graph I need to know what was the source of this "interesting" value (which is maximum here - I even keep it in the name of the variable to see if I can use it later)....
> > > >
> > > > Any idea?
> > > >
> > > > Regards;
> > > > Sbnm
> > > > From: Shabnam Shahreza
> > > > Sent: Wednesday, November 16, 2011 10:33 AM
> > > > To: rrd-users at lists.oetiker.ch
> > > > Subject: value and name both
> > > >
> > > > Hi everyone:
> > > >
> > > > Imagine that I have something like this (please ignore if the syntax if not 100% correct - it is more complicated in my script)
> > > >
> > > > "CDEF:name=var1,var2,var3,var4,... <number of variables>,SORT, POP"
> > > >
> > > > This gives me the maximum (although I had to use REV as well.. by this is working in my script fine....ignore the syntax please)
> > > >
> > > > My question is how can I find which one of those "variables" [var1,var2, .... ] was the maximum?!!
> > > > I want not only the value but also the "name" of the variable as it has some good information for me....
> > > >
> > > > Regards;
> > > >
> > > > Shabnam Shahreza
> > > > Alpha Group
> > > > p: 647-259-0443
> > > > c: 647-638-6440
> > > > f: 416-642-2120
> > > > 70 York Street, Suite 1501
> > > > Toronto, ON M5J 1S9
> > > > www.alpha-group.ca<http://www.alpha-group.ca/>
> > > >
> > > >
> > > > Before printing, think about the environment
> > > >
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> > > >
> > >
> > >
> >
> >
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900