5
0
So if there is a day:
https://secure.wikimedia.org/wikipedia/en/wiki/Daylight_saving_time
when we have to e.g.: set our clock back from 3am to 2am. Ok.
So if someone creates a cron job at 3am, then if a daylight saving day comes, the backup will run first at 3am, then the clock is automatically set back to 2am, 1 hour passes, then the backup runs again, because it's 3am! [and let's say, that there could be a problem, if the backup runs twice a day. or even worse: no backup will run, because it was e.g.: scheduled at 2am, but the clock never hits 2am, because it will be automatically set to 3am! when we have to set our clocks forward].
so the real Question: Are the daylight saving times are the same around the world, or are they in a different time? Should we take notice of this "theoretical" problem?
Hm, I hadn't thought about that with my 2:30 AM backups... – Kromey – 2011-04-28T21:52:16.973
In what context are you asking the question? If you are developing a product, it should be easy enough to check if a backup is currently happening, or has happened recently. You might also look at interfacing with whatever library on the whatever system you are using implements DST, and see if you can work aground it. – Zoredache – 2011-04-28T21:55:48.917
just a unix/linux sysadmin – LanceBaynes – 2011-04-28T22:07:05.963