The RRD manpage for rrdgraph says this: Apart from generating graphs, it can also extract numerical reports.
Is this referring to the GPRINT instructions or, is there an ability to fetch the data from graph DEFs and CDEFs? What I'm really looking for is the ability to specify to 'rrdtool fetch' the files and DSs that I want to pull data from, and have it combine that data in new and interesting ways (like I can do with the graphing methods). Right now, for example, if I have three interfaces (in separate RRD files) and I want to know my total traffic for those three interfaces, I can specify the three DEFs in the files, specify a bunch of CDEFs, and then graph the data. I can even go so far as to get the MAX, MIN, AVG, etc. values of particular CDEFs, and print them onto the graph using GPRINT. If I want these values, though, for a printed report or something, how do I get them? The fetch function seems to only take one RRD, and you can't do any data manipulation of the data it gets back. If I want to get combined traffic data, I have to do that work myself, including any data reorganization that may be necessary (especially if they're on different step intervals). I would think that since the ability to do this type of manipulation is already in the code for the graphing function, that the fetching functions should also have access to it, but I can't find it anywhere. Is this built-in, and if not, has anyone written a utility that allows this to be done? * Philip Molter * DataFoundry.net * http://www.datafoundry.net/ * [EMAIL PROTECTED] -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi
