Re: Does OpenZFS support taking snapshots of the entire operating system?

Assuming they're on the same pool or the components are direct 
descendants (thus you can use "-r" and do it with one command), yes.

On 10/28/2022 04:26, Matt Churchyard wrote:
>
> -- You can snapshot a running root filesystem if it is ZFS; that has 
> always been true of ZFS.
>
> -- If the "entire operating system" spans more than one filesystem or 
> pool, however, you cannot get an atomic snapshot across them.  Thus if 
> you want that capacity (e.g. an atomic snapshot that is an "instant in 
> time") the "entire operating system" must be contained in one ZFS 
> filesystem.
>
> From the ZFS man page –
>
> “-r: Recursively create snapshots of all descendent datasets. 
> Snapshots are taken atomically, so that all recursive snapshots 
> correspond to the same moment in time.”
>
> It’s perfectly possible to take an atomic snapshot of every dataset on 
> a pool.
>
> -
> Matt
>
> On 10/27/2022 09:26, Turritopsis Dohrnii Teo En Ming wrote:
>
>     Subject: Does OpenZFS support taking snapshots of the entire
>     operating system?
>
>     Good day from Singapore,
>
>     Does OpenZFS support taking snapshots of the entire operating system?
>
> -- 
> Karl Denninger
> karl@denninger.net
> /The Market Ticker/
> /[S/MIME encrypted email preferred]/
>
-- 
Karl Denninger
karl@denninger.net
/The Market Ticker/
/[S/MIME encrypted email preferred]/