ZFS going forward, on stable/13 vs. main: question

[Mark Millard]

[Just a resend: asking the question on the list
less than an hour before the UTC month change
might not be all that effective relative to
those that just web browse the list to read it.]

On 2021-Apr-30, at 16:21, Mark Millard <marklmi at yahoo.com> wrote:

> Context . . .
> 
> I've been experimenting with ZFS and bectl use recently.
> It has been many years since I last used ZFS --and that
> was only a short experiment that did not have to deal
> with upgrades over time.
> 
> I now have:
> 
> # bectl list 
> BE               Active Mountpoint Space Created
> 13S-CA72-nodbg   N      /          4.02G 2021-04-27 18:55
> 13_0R-CA72-nodbg R      -          8.49G 2021-04-28 10:48
> main-CA72-nodbg  -      -          3.24G 2021-04-30 13:25
> 
> (so a stable/13 vintage , releng/13.0 as of release/13.0.0 ,
> and a main vintage for what things are based on). That is
> via:
> 
> zroot/ROOT/13S-CA72-nodbg                          1.60G   131G     4.10G  /
> zroot/ROOT/13_0R-CA72-nodbg                        8.49G   131G     4.59G  /
> zroot/ROOT/main-CA72-nodbg                         1.77G   131G     4.63G  /
> 
> For reference: the context is simple in various
> other respects:
> 
> # gpart show
> =>       40  468862048  da0  GPT  (224G)
>         40     532480    1  efi  (260M)
>     532520       2008       - free -  (1.0M)
>     534528   25165824    2  freebsd-swap  (12G)
>   25700352   25165824    4  freebsd-swap  (12G)
>   50866176  417994752    3  freebsd-zfs  (199G)
>  468860928       1160       - free -  (580K)
> 
> The USB SSD is used to boot and use any of (all
> aarch64):
> 
> An OverDrive 1000
> A MACCHIATObin Double Shot
> Various RPi4B's with 8 GiBytes RAM
> Potentially various RPI4B's with 4 GiBytes RAM.
> 
> 
> Question . . .
> 
> Are there any potential future upgrade issues with main
> [so: 14] vs. stable/13 and releng/13.0 , say by main
> updates involving ZFS updates in a way stable/13 or the
> recent releng/13.* might not handle?
> 
> The implication would be that such a mix of boot
> environments on the same zpool or media might not
> be a good idea over time: main might be better
> separated so the ZFS versioning is independent
> between 13 and 14.
> 



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