[rrd-users] Re: Correcting for GMT lag on daily values
Alex van den Bogaerdt
alex at ergens.op.het.net
Sat Sep 7 04:54:30 MEST 2002
On Fri, Sep 06, 2002 at 11:39:33AM -0400, Joe Loiacono wrote:
> However, the times associated with the values in the database are set to
> the local time, and hence when a graph is generated the data is offset from
> the vertical lines which occur on the GMT midnight boundaries. Here in
> Maryland its 4 hours different (5 after Nov. 1), producing an unclean and
> confusing graph.
Time on your system should be local time. Timestamps for RRDtool
should be similar to what
perl -e 'print time()."\n"'
outputs. GNU date will also do:
Vertical lines are set using a VRULE. The timestamp used for
that should be build from local time, not UTC time. This is
set by the application and not by RRDtool. Using GNU date:
date -d '03:00' +%s
gives me the local time 03:00 in the correct format for VRULE.
> I'm in the process of trying the 3600 step approach (first attempt
Don't forget you have to use a suitable heartbeat: 86400 or more!
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