zfs scrub enable by default

[John Long]

On 03/08/2020 18:11, Karl Denninger wrote:
> On 8/3/2020 14:05, Peter Eriksson wrote:
>>> In cases where that assumption is false - the resources consumed by 
>>> an hours-long scrub, slowing down a system which people expect to be 
>>> "as responsive as it usually it"...
>>>
>>> Our defaults should try to minimize the nasty surprises.
>>>
>>> -Walter
>>>
>>>
>>> On Mon, 3 Aug 2020, Steve Wills wrote:
>>>
>>>> Hi,
>>>>
>>>> I wonder why we don't enable zfs periodic scrub by default?
>>>>
>>>> https://svnweb.freebsd.org/base/head/usr.sbin/periodic/periodic.conf?view=markup#l162 
>>>>
>>>>
>>>> Anyone happen to know?
>>>>
>>>> Thanks,
>>>> Steve
> 
> I will pipe up AGAINST making this a default "do on its own" thing.

Agreed. Please don't do this. That goes beyond the bounds of providing a 
useful system and crosses the red line of doing things we didn't ask 
for, don't reasonably expect, and could lead to problems that are 
impossible to anticipate. It is up to the user to configure his system 
the way he wants. The as-installed OS should be as unsurprising, benign, 
and vanilla as possible.

Windows 10 boxes come preconfigured to defrag the hard drive 
automatically on some eerily disruptive schedule. I have to turn it off 
on every new box to avoid performance problems. I had to uninstall large 
sets of packages on Fedora Linux to stop the system indexing file 
contents in the name of uber-search capability which I don't want, a la 
Microsoft. Surely, FreeBSD can avoid these kinds of problems.

Thank you.

/jl