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<p>Dear All,</p>
<p>Updated question: Is it possible to configure the "N" parameter
supplied by linstor for --max-peers "N"?<br>
</p>
<p>
As far as i understand it now, linstor uses "--max-peers 7" as an
fixed argument, which substantialy limits the DRBD capability to
handle up to 31 peers.<br>
Thank you.</p>
<p>Best regards</p>
<pre class="moz-signature" cols="72">Roman Szabados</pre>
<div class="moz-cite-prefix">On 2/22/19 2:45 PM, Roman Szabados
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:90738002-7f2c-afcd-3615-54db558dedfb@Szabados.sk">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>Dear All,</p>
<p>In our use case, we need to have up to 16 peers sharing the
same resource and snapshot, which is later used on all
hypervisors to build the actual specific VM from the snapshot.
But after trying to add more than the 8th node, i get this error
message:</p>
<p><tt>root@dagobah:~# linstor r c alderaan felucia kessel
vm-base-1804-system --storage-pool ssd-pool</tt><tt><br>
</tt><tt>ERROR:</tt><tt><br>
</tt><tt>Description:</tt><tt><br>
</tt><tt> <font color="#ff0000"><b>Resource on node bespin
has insufficient peer slots to add another peer</b></font></tt><tt><br>
</tt><tt>Details:</tt><tt><br>
</tt><tt> Node(s): 'alderaan', 'felucia', 'kessel', Resource:
'vm-base-1804-system'</tt><tt><br>
</tt><tt>Show reports:</tt><tt><br>
</tt><tt> linstor error-reports show 5C28F669-00000-000115</tt><tt><br>
</tt><tt>root@dagobah:~#</tt></p>
<p>I do assume, that this is a limitation of Linstor. Can this
limit be configured to accept more than 8 nodes per ressource in
Linstr?<br>
Thank you.<br>
</p>
<pre class="moz-signature" cols="72">Roman Szabados</pre>
<div class="moz-cite-prefix">On 2/21/19 10:39 AM, Roland Kammerer
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20190221093921.wcxklgknifbf2j24@rck.sh">
<pre class="moz-quote-pre" wrap="">On Wed, Feb 20, 2019 at 02:35:16PM +0530, Malhar vora wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Hi Experts,
Does anyone know how many nodes can be supported for DRBD ?
Can DRBD support count like 1000+ nodes ?
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">What Robert wote, plus:
IMO the important thing here is "at the same time or not" and "1000
times redundant"? The second one is easy, it does not make sense. For
the first one: Usually you make resource available 2 or 3 times
redundant (every bit is also on 1 or 2 different servers). And then you
have like a ton of hypervisors. But only one connects to the storrage
at a given point in time. Or 2 because of live migration. These
hypervisors would be diskless clients, that connect to the storage via
network only. And if they don't need it anymore, another diskless client
accesses the data. Most of our plugins that integrate DRBD/LINSTOR with
other platforms like k8s, openstack, opennebula,... do exactly that:
They create storage N-times redundant and create/delete diskless
assignments on demand. So yes, conceptually you then can have 1000
nodes.
Regards, rck
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