On Mon, 26 Nov 2012, [email protected] wrote:
On Mon, Nov 26, 2012 at 02:08:52PM +0000, Matthew Seaman wrote:
Secondly, for the sake of the servers, please don't run 'portsnap fetch'
from a cron job. You're not the only person to think of doing that, and
most people who do have the job run at the top of the hour. This is
bad. The servers really don't like it when several thousand cronjobs
all fire off simultaneously and the system load goes through the roof.
Which is why 'portsnap cron' exists -- it does exactly the same as
fetch, except it waits for a random amount of time before pulling down
any data.
More generally, a cron job can be run with a random delay added before
the real job kicks off. Just prefix the command you want cron to run
like so:
sleep $(jot -r 1 1 900) && command to run
If you like, replace 900 with some other number to change the upper bound
on the number of seconds to delay.
portsnap has a "cron" command that does this.
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