[Gluster-users] un-expected warning message when atempting to build a 4 node gluster setup.

[Ravishankar N]

On 04/16/2018 05:15 AM, Thing wrote:
> Hi,
>
> I am on centos 7.4 with gluster 4.
>
> I am trying to a distributed and replicated volume on the 4 nodes
>
> I am getting this un-expected qualification,
>
> [root at glustep1 brick1]# gluster volume create gv0 replica 2 
> glusterp1:/bricks/brick1/gv0 glusterp2:/bricks/brick1/gv0 
> glusterp3:/bricks/brick1/gv0 glusterp4:/bricks/brick1/gv0
>
> 8><----
>
> Replica 2 volumes are prone to split-brain. Use Arbiter or Replica 3 
> to avoid this. See: 
> http://docs.gluster.org/en/latest/Administrator%20Guide/Split%20brain%20and%20ways%20to%20deal%20with%20it/.
> Do you still want to continue?
>  (y/n) n
>
> 8><-----
>
> Looking at both gluster docs and redhat docs this seems un-expected.

This warning was introduced from glusterfs 3.11 onward to encourage 
people to move away from replica 2 and use arbiter (or replica 3) 
instead.  If you are okay with the split-brain issues inherent in 
replica 2, you can still go ahead and create it.
Regards,
Ravi
>
> regards
>
> Steven
>
>
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