Hey Shabnam, David here :) Shabnam is using a shell script to construct rrdgraph statements.
My suggestion to Shabnam originally ( off list ) was to do some rrd fetch commands before the main rrdgraph construction. Var1=`rrdfetch ds1 maximum blah` Var2=`rrdfetch ds2 maximum blah` If var1 > var2 Max ="var1" Else Max = "var2" Fi ... Rrdgraph "stuff ... $max ... Stuff " But now I wonder if you can I do a vdef (maximum) fetch? how do I distinguish between vdef maximum and cdef max? David Thornton Northdot9 On 11/21/11, Simon Hobson <[email protected]> wrote: > Shabnam Shahreza wrote: > >>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? > > Almost certainly. > > rrdtool fetch simply returns the data stored in the database - it > does **NOT** do any data manipulation. rrdgraph on the other hand > will resample the data to fit your graph unless you take care to make > this a null operation. > > Even if you use rrdtool graph, I would not try finding data like that > - it only takes a very small change in conditions for that exact > value to not appear. > > However, in the example I gave, you did not have to look for a value > (at least not in a separate run) - what you printed was an index to > the data set that gave rise to the value you were after. Ie, you > wouldn't get something like 7.843519 and have to find where it came > from, you'd get (for example) 1, 2, or 3 - signifying source 1, 2, or > 3 respectively. > And BTW - please don't try and take threads off-list unless asked to. > It's impolite both to the person your asking for one-to-one help from > and to the rest of the people on the list who may well be able to > assist. Also, it means the conversation doesn't go into the list > archives for the benefit of others looking for answers later. > > -- > Simon Hobson > > Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed > author Gladys Hobson. Novels - poetry - short stories - ideal as > Christmas stocking fillers. Some available as e-books. > > _______________________________________________ > rrd-users mailing list > [email protected] > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users > -- Sent from my mobile device _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
