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<div class="moz-cite-prefix">On 1/25/2019 1:33 PM,
<a class="moz-txt-link-abbreviated" href="mailto:ash-dovecot@comtek.co.uk">ash-dovecot@comtek.co.uk</a> wrote:<br>
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<blockquote type="cite"
cite="mid:8603b013-8861-3ca6-0ede-f073993d29bc@comtek.co.uk">
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<p>We will be deploying a replacement Dovecot server soon, and we
are planning to use maildir for the primary storage, but with an
archive namespace using mdbox (or perhaps sdbox), and SIS.</p>
<p>Our backup servers and (luke)warm spare server need to obtain
full copies of the mail store. For the maildirs I know I can
simply use rsync (we already use it here).<br>
</p>
<p>I'm a little wary of using rsync with mdbox and SIS though.</p>
</blockquote>
<p>Significantly limited knowledge opinions below:<br>
</p>
<p>Probably not the answer you want - but I would strongly suggest
using Dovecot replication. Dovecot replication Just Works - so
don't reinvent the wheel when Timo provided such a polished tool
already. And based on my previous SIS experience - while dbox is
nice I would suggest avoiding SIS until there are reports of more
development. Sdbox will be solid - which is what you want for an
archive - though maildir would be the safest. Archives don't need
to be rapid-access - they need to be dependable. SIS is wonderful
for space saving - but until there's more safety checks built-in
I'd suggest avoiding it for production backups. Drives are cheap
- lost data, lost time, lost hair, lost sanity...is not.<br>
</p>
<blockquote type="cite"
cite="mid:8603b013-8861-3ca6-0ede-f073993d29bc@comtek.co.uk">
<p>I'm aware of "doveadm backup", and (although it currently
throws up a few errors) it seems like it might be a valid
solution for our warm spare server. Our backup servers, on the
other hand, aren't supposed to be visible to the production
machines, with the exception of the backup machine sshing in to
do an rsync each night. We can't install dovecot on them.</p>
</blockquote>
<p>The backups don't have to be "visible" to other machines - don't
even have to be running IMAP/POP services (I think). And the
replication command is run - via ssh (see
<a class="moz-txt-link-freetext" href="https://wiki.dovecot.org/Replication">https://wiki.dovecot.org/Replication</a>) - so what's the problem?<br>
</p>
<pre>--</pre>
<pre class="moz-signature" cols="72">Daniel</pre>
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