Re: ZFS monthly scrubs
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On 09.11.2011 19:40, Robert Millan wrote:
> For a system that's used regularly 20 mounts is basically one month.
> I get the impression there's consensus on one month as a reasonable
Probably, yes. It's a somewhat fair trade-off between beneficial checks
and heavy I/O loads.
> Would you use /etc/cron.monthly or a custom script to run first sunday
> of every month like mdadm?
That seems to be the best heuristic to me. After all, the site
administrator can always tweak the cronjob to schedule it whenever he
likes. Hence we shouldn't be worried too much /when/ to execute it, only
/whether/ we should do so at all.
> Running only on sunday sounds good, I wonder why doesn't
> /etc/cron.monthly always run on sundays already.
Maybe it has historic reasons? Besides, it's a locale interpretation of
our hemisphere to presume Sunday morning is the least busy part of the
week in terms of workloads. I'd guess in the Arabian world our Sunday
workload low is reached Fridays there.
with kind regards,
IRC: daemonkeeper on Freenode/OFTC
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