On 2014-09-16, Warren Young <warren@xxxxxxxxxxx> wrote:
> On 9/16/2014 13:24, Matt wrote:
>> If I have multiple files in cron.weekly and one script takes hours to
>> finish. Will it block other scripts in cron.weekly?
>
> I doubt it, based on the results of this crontab on EL7:
>
> 51 13 * * * echo start 1 ; sleep 2m ; echo end 1
> 51 13 * * * echo start 2 ; sleep 2m ; echo end 2
>
> At 13:51, nothing appeared in my mail file. Two minutes later, two
> different messages appeared, each with the expected "echo" outputs.
> Thus, they must have run in parallel.
Those are two distinct cron jobs. The scripts in /etc/cron.weekly are
all run by the same cron job in /etc/crontab.
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
I believe that run-parts runs each script in serial, and therefore a
long-running weekly script will block.
If you don't care when you get the output, and have only one
long-running script, you can rename it so that it runs last. Otherwise,
you'd need to put the long-running job into its own cron entry.
--keith
--
kkeller@xxxxxxxxxxxxxxxxxxxxxxxxxx
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