Re: Changing the start and end times for daily (step=86400) consolidation?
"Alex van den Bogaerdt" <[email protected]> Tue, 28 Jun 2016 06:33:12 +0200
| Newsgroups | gmane.comp.db.rrdtool.user |
|---|---|
| Message-ID | <04a448a1c2e07fad4edc9966fc52ec2f.squirrel@webmail.argewebhosting.nl> |
>> AFAIK it's a known issue with no easy solution. I think the only >> workarounds have involved > fiddling with the timezone to fudge things. > > Oh, bother. I was hoping that my use case was common enough that there was > an option I was just missing. > > So it looks like I have to set TZ=UTC and munge the timestamps on insert > so > that when I insert at (say) 5:00PM PDT I'm actually inserting 5:00PM UTC. > Handling Daylight Saving will be a pain, though - I'll have to switch > between UTC and UTC+1 (or UTC-1) when generating charts depending on the > day > of the year. The problem with that: ... 05:57 05:58 05:59 05:00 05:01 05:02 ... When DST ends, one hour is repeated. Similarly one hour is missing when DST kicks in. You can't change timezone halfway a graph, so this will bite you two days in a year. Don't know, didn't test this, just as an idea: Would it work to create an artificial timezone which is similar to the British timezone, but DST happening at 5am on the American days? alex