There is difference between server and bricks which we should understand.
When we say m+n = 6+2, then we are talking about the bricks.
Total number of bricks are m+n = 8.
Now, these bricks could be anywhere on any server. The only thing is that the server should be a part of cluster.
You can have all the 8 bricks on one server or on 8 different servers.
So, there is no *restriction* on number of servers when you add bricks. However, the number of bricks which you want to add should be in multiple of the
configuration you have.
In you case it should be 8, 16, 24....
"can I add a single node moving from 6:2 to 7:2 and so on ?"
You can not make 6+2 config volume to 7+2 volume. You can not change the *configuration* of an existing volume.
You can just add bricks in multiple to increase the storage capacity.
Ashish
From: "Serkan Çoban" <cobanserkan@xxxxxxxxx>
To: "Gandalf Corvotempesta" <gandalf.corvotempesta@xxxxxxxxx>
Cc: "gluster-users" <Gluster-users@xxxxxxxxxxx>
Sent: Saturday, April 22, 2017 5:34:52 PM
Subject: Re: Add single server
In EC if you have m+n configuration, you have to grow by m+n bricks.
If you have 6+2 you need to add another 8 bricks.
On Sat, Apr 22, 2017 at 3:02 PM, Gandalf Corvotempesta
<gandalf.corvotempesta@xxxxxxxxx> wrote:
> I'm still trying to figure out if adding a single server to an
> existing gluster cluster is possible or not, based on EC or standard
> replica.
>
> I don't think so, because with replica 3, when each server is already
> full (no more slots for disks), I need to add 3 server at once.
>
> Is this the same even with EC ? In example, a 6:2 configuration is
> "fixed" or can I add a single node moving from 6:2 to 7:2 and so on ?
> _______________________________________________
> Gluster-users mailing list
> Gluster-users@xxxxxxxxxxx
> http://lists.gluster.org/mailman/listinfo/gluster-users
_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
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To: "Gandalf Corvotempesta" <gandalf.corvotempesta@xxxxxxxxx>
Cc: "gluster-users" <Gluster-users@xxxxxxxxxxx>
Sent: Saturday, April 22, 2017 5:34:52 PM
Subject: Re: Add single server
If you have 6+2 you need to add another 8 bricks.
<gandalf.corvotempesta@xxxxxxxxx> wrote:
> I'm still trying to figure out if adding a single server to an
> existing gluster cluster is possible or not, based on EC or standard
> replica.
>
> I don't think so, because with replica 3, when each server is already
> full (no more slots for disks), I need to add 3 server at once.
>
> Is this the same even with EC ? In example, a 6:2 configuration is
> "fixed" or can I add a single node moving from 6:2 to 7:2 and so on ?
> _______________________________________________
> Gluster-users mailing list
> Gluster-users@xxxxxxxxxxx
> http://lists.gluster.org/mailman/listinfo/gluster-users
_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
http://lists.gluster.org/mailman/listinfo/gluster-users
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