6 ms·

So that it backs up at a different time each day? For instance, if it is set to 11H, and you were starting at 4pm on a day, then the backup would run next at:

So that it backs up at a different time each day? For instance, if it is set to 11H, and you were starting at 4pm on a day, then the backup would run next at: 15h, 2h, 9h, 20h, 7h....etc. So you won't have the backup running at the same time everyday. Personally speaking I would prefer that the backup runs at the same time everyday but some people don't.

xvedejas 6y ago
Well, it's not that the number is prime. There are many numbers which don't back up at the same time every day that aren't prime, like 25hrs or 22hrs. Numbers which are more complex fractions of a full day will take longer to repeat. Depending on a more exact statement of the goal, the best constant interval to avoid repeating parts of the day on nearby dates would be to multiply a day's length by the golden ratio; this would be about every 38.833 hours. Since the golden ratio is irrational, you'll technically never repeat the same time. But if I remember correctly, it's the best number to space out the times uniformly throughout the day and also distantly between nearby days.