On 22/04/2016 00:20, Roland Kammerer wrote:
On Thu, Apr 21, 2016 at 11:54:05PM +1000, Adam Goryachev wrote:
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?
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.
My deployment count is currently set to 2. So there are two storage
nodes with a copy of the data.
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.
*Satellite nodes* have:
* No direct access to the control volume, they receive a copy of the
cluster configuration via TCP/IP.
* Local storage if it is a normal satellite node
* No local storage if it is a pure client
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?
Regards,
Adam
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