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<p>Thanks Roland,</p>
<p>I am not sure if I should start a new topic for this, but now you
have me wondering....</p>
<p>I use a classic 3 node setup, LVM backing devices, and a stacked
third node for DR using Protocol A. I have a VPN between the main
site and off-site and the latency hovers around 10ms.</p>
<p>Are there compelling reasons for me to look into DRBD 9? My
current setup is pretty solid, so far I have never needed to use
the off site copies (touch wood). I have 12 resources (all KVM HA
servers) piped through the VPN.</p>
<p>regards<br>
</p>
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<p><b>Paul O'Rorke</b><br>
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<div class="moz-cite-prefix">On 2019-01-30 12:55 a.m., Roland
Kammerer wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20190130085518.hpuobegjzgk4rguw@rck.sh">
<pre class="moz-quote-pre" wrap="">On Tue, Jan 29, 2019 at 01:38:14PM -0800, Paul O'Rorke wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">What does node-id do?
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
With more than two nodes DRBD needs some information against which other
peer(s) it tracks changes. In DRBD8 you only have one peer, "easy", in
DRBD9 you have to know this is "Node A", this is "Node B",... Using
information that changes (e.g., hostnames) is too volatile. So one has
to give nodes an ID, a unique identifier that never changes. (There are
scenarios where you don't need them even in DRBD9 setups, but let's not
go down that rabbit hole).
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Is it a drbd 9.0.x / Linstore thing? I'm using 8.9.6
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
yes, a DRBD9 thing.
Regards, rck
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