svn commit: r356758 - in head/usr.sbin/bsdinstall: . scripts

[Mark Millard]

Ben Woods woodsb02 at gmail.com write on
Thu Jan 23 00:07:13 UTC 2020 :

> Before I commit phabricator review D23224, is there any final comments?
> 
> Particularly on these 2 lines of help-text:
> msg_partitioning_zfs_help="ZFS is recommended if you have at least 4GB RAM"
> msg_partitioning_ufs_help="UFS is recommended if you have less than 4GB of
> RAM"
> 
> There is some disagree about what these 2 recommendations should be.
> 
> 4GB was recommended by: imp, emaste, philip, eugen, dteske
> 8GB was recommended by: mike
> 16GB was recommended by: cem
> 
> The 4GB limit seems to have the best consensus, however there was some
> debate about whether ZFS is recommended on a system with 4GB, or only
> systems with MORE THAN 4GB.

What of uSD card based systems (for example small ARM boards)?
Does the typical performance characteristics of the uSD cards
(such as large latencies) have ZFS consequences to avoid? More
generally: is there anything besides RAM that has enough use but
also has good reason to contribute to a potential choice to
avoid ZFS? (I've no clue of uSD card use makes a good example or
not, but I wanted something to illustrate the general question.)

I do like the choice to just add some quick notes to read
instead of detecting and adjusting defaults.

[This may not make it to freebsd-arch: it is historically rare
that I'd comment there and so I've not tried to be added.
Anything I submit there goes through a moderator and I've
never objected when one of those rare ones did not go
through.]

> As for the ZFS auto-tuning, I see that as being a separate discussion
> (which could ultimately change this recommendation, but shouldn't prevent
> us from committing this help text now).



===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)