Greetings, I'm having trouble understanding exactly how RRD is handling timestamps that I use to render graphs.
I create the RRDs and populate them with data, using local timestamps. When I run rrdtool to do this, I do not specify a TZ environment variable value. I generate graphs from date X, midnight, to date Y, midnight. I also include on these graphs two VRULEs at midnight on particular dates. The problem is that I cannot get the VRULEs and the data points to be properly aligned; the VRULEs and data points are offset from midnight by what appears to be the same amount of time as my UTC offset (I'm on the US west coast). When I run rrdtool to graph this data and do NOT specify a TZ environment variable, I get this graph: http://www.cprogrammer.org/pub/proper_vrule_skewed_data.png The VRULEs and beginning and end of graph are correct, all being on midnight of the specified dates. However, all of the data points are shifted by my offset. If I run rrdtool to graph the data but specify TZ=PDT in the environment, I get this graph: http://www.cprogrammer.org/pub/pdt_skewed_vrule.png In this case, all of the data points are aligned properly (i.e., all are aligned with the days, because that's what they're measuring), but the VRULEs and beginning and end of graph are all shifted by my offset. So both of these graphs are pretty hard to read. What is going on? What am I missing? Any help would be greatly appreciated! Thanks, -- Jonathan Daugherty JanRain, Inc. irc.freenode.net: cygnus in #openid cygnus.myopenid.com _______________________________________________ rrd-users mailing list [EMAIL PROTECTED] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
