Date: Thu, 27 Oct 2022 09:29:21 -0400 From: Karl Denninger <karl@denninger.net> To: freebsd-fs@freebsd.org Subject: Re: Does OpenZFS support taking snapshots of the entire operating system? Message-ID: <5391a765-a526-fb19-2f24-bd9067d2f125@denninger.net> In-Reply-To: <CAD3upLtCew9a63DM=8D1KKi=1sZXs9HqpYSdUJ%2B7BhwL8TKJrg@mail.gmail.com> References: <CAD3upLtCew9a63DM=8D1KKi=1sZXs9HqpYSdUJ%2B7BhwL8TKJrg@mail.gmail.com>
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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.
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]/
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<p>You can snapshot a running root filesystem if it is ZFS; that has
always been true of ZFS.</p>
<p>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.<br>
</p>
<div class="moz-cite-prefix">On 10/27/2022 09:26, Turritopsis
Dohrnii Teo En Ming wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAD3upLtCew9a63DM=8D1KKi=1sZXs9HqpYSdUJ+7BhwL8TKJrg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Subject: Does OpenZFS support taking snapshots of
the entire operating system?<br>
<br>
Good day from Singapore,<br>
<br>
Does OpenZFS support taking snapshots of the entire operating
system?<br>
<br>
<br>
</div>
</blockquote>
<div class="moz-signature">-- <br>
Karl Denninger<br>
<a href="mailto:karl@denninger.net" class="moz-txt-link-freetext">karl@denninger.net</a><br>
<i>The Market Ticker</i><br>
<font size="-2"><i>[S/MIME encrypted email preferred]</i></font></div>
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