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<div class="moz-cite-prefix">On 22/04/2016 00:20, Roland Kammerer
wrote:<br>
</div>
<blockquote cite="mid:20160421142009.GP1371@rck.sh" type="cite">
<pre wrap="">On Thu, Apr 21, 2016 at 11:54:05PM +1000, Adam Goryachev wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi,
I've setup a few DRBD9 machines as a storage cluster with 4 nodes, plus one
"satellite" node.
I was wondering how I can access the content on the various DRBD volumes
from the rest of the cluster?
</pre>
</blockquote>
<pre wrap="">
That has nothing to do with satellite or not.
If you specified a deployment count while creating the volume
(new-volume -d) the volume gets automatically deployed on a set of "best"
nodes. If you did not, you have to assign (assign-resource) to one or
multiple nodes. Then you get a /dev/drbdXYZ on that nodes and use it as
any drbd resource.
</pre>
</blockquote>
My deployment count is currently set to 2. So there are two storage
nodes with a copy of the data.<br>
<br>
I think I was looking for the DRBD "Client" mode, which appeared to
be the same as a DRBD Satellite node, with no local storage.<br>
<br>
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<p><span class="strong"><strong>Satellite nodes</strong></span>
have:</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
No direct access to the control volume, they receive a copy of
the cluster configuration via TCP/IP.
</li>
<li class="listitem">
Local storage if it is a normal satellite node
</li>
<li class="listitem">
No local storage if it is a pure client
</li>
</ul>
</div>
Otherwise, what exactly is the point of a Satellite node which is a
pure client (ie, no local storage)? What does it add to the DRBD
structure?<br>
<br>
Regards,<br>
Adam<br>
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