[rrd-users] Re: CDEF & TIME/LTIME

Alex van den Bogaerdt alex at ergens.op.het.net
Sat Nov 13 01:22:22 MET 2004

On Fri, Nov 12, 2004 at 06:07:59PM -0500, William Wong wrote:

> I have data from two different sources, each saved under a different 
> timezone.

Data is in UTC.  Timezones do not apply until you're going to graph.

> I would like to adjust one set of data so that I could overlay them.

Rates that occured at the same time (UTC time) can be overlayed.

Rates that occured at different times (both 09:00 am local time) can,
AFAIK, not be overlayed.  Some proposals have been done. I had to drop
development and to the best of my knowledge nobody picked it up.

Consider what happens to the connection between site A and site B:
If you would graph traffic for both sites in their own local time,
you'd get a peak at (say) 09:00 your local time _and_ a peak at
10:00 your local time (because it was _their_ 09:00 local time).

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