Hi, all--
On Oct 16, 2009, at 8:23 AM, Sam Mason wrote:
[ ... ]
So, to those people who want to use a cron job. I'd say go for it,
just
make sure it's not too close to the hour, the minute isn't divisible
by
5 and you put a random pause in (up to a second, as I see very
reliable
spikes at 370ms to 400ms into each second) and you should be set.
This is a fine suggestion, except that I'd make the delay more like a
random pause of at least 60 seconds, and possibly up to 5 minutes
would be better. As you noticed, humans tend to pick certain numbers
much more often than others, and cron itself normally has 1-minute
granularity.
And, if you're setting up a lot of machines to sync time via a
periodic cron job, you should be sync'ing to a local-network
timesource which is running ntpd normally, and not to a stratum-1
timeserver over the WAN...
Regards,
--
-Chuck
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