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Re: lograte rotating logs at 4:02am. why not at 12:00am?



On Fri, Apr 23, 2004 at 03:16:00PM -0400, Javier Gostling wrote:
> On Fri, Apr 23, 2004 at 12:03:16PM -0700, Chris W. Parker wrote:
> > my question is: why are they not starting at 12am and how can i adjust
> > this?
> 
> The reason is quite simply Daylight Saving Time. If you rotate at midnight,
> as someone where I work decided before I came in, you face the following
> issues when time changes:
> 
> 1. When skipping from 00:00 to 01:00, if cron doesn't wake before the clock
> shift, the log rotation will not occur.
> 
> 2. When skipping back from 00:00 to 23:00, if cron wakes before the clock
> shift, the log will be rotated twice.
> 
> I have seen both issues happen. To avoid both problems, rotate after 01:00
> and before 23:00.

I don't know where you live, but in Canada and the US, the shift to/from
Daylight Savings Time occurs at 2am.i  Avoid cron jobs between 2am and
3am.

-- 
Ed Wilts, Mounds View, MN, USA
mailto:ewilts ewilts org
Member #1, Red Hat Community Ambassador Program



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