[rrd-users] Re: RRDs::fetch perl method
rader at ginseng.hep.wisc.edu
Fri Apr 6 22:36:09 MEST 2001
> From: "Daniel J McDonald"
> So, either the -r flag doesn't work, or I've misinterpreted what it does..
"man rrdfetch" for -r reads
[...] will return data even if no absolute match is possible
I think "absolute match" does not refer to the specified
resolution like you'd think but rather the start/end times.
In other words, the fetch start and end have to exactly align
on a daily boundry. For example, I find that (with MRTG-ish
-r 86400 -s -2days -e -1day
will fetch 86400 second resolution data
-r 86400 -s -25hours -e -1hour
fetches 7200 second resolution data.
Having said that, I can't explain why I find that
-r 86400 -s -86400 -e now
returns 300 second interval resolution data?!
- - -
systems & network guy
high energy physics
university of wisconsin
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