Hi, When I first started using RRDTool, we noticed that it was not possible to add or remove DSes from rrd files once they've been created. For that reason, we've been using RRDTool with exactly one DS per rrd file.
Now, 2.5 GB of rrd files later, we've discovered, that due to performance reasons, this just doesn't fly any more. Having several of these DSes in the same RRD file is just SO much faster and causes much less IO and therefore load on the system. I found a RRD-Merger tool that merges old and new *values* (from the same DS) into a single rrd file, but not one that adds or removes DS-es to/from a RRD file. Also, it loads the entire rrdtool dump of file.rrd into memory at once during parsing, which doesn't fly either. Are there tools out there that can do this? If not, I'll just write my own using perl and XML::Twig - but I'd rather put my effort into other things! :D Peter -- Peter Valdemar Mørch http://www.morch.com -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
