You can setup your bricks in such way , that each host has at least 1 brick.
For example:
Server A: VOL1 - Brick 1
Server B: VOL1 - Brick 2 + VOL 3 - Brick 3
Server C: VOL1 - Brick 3 + VOL 2 - Brick 2
Server D: VOL2 - brick 1

The most optimal is to find a small system/VM for being an arbiter and having a 
'replica 3 arbiter 1' volume.

Best Regards,
Strahil Nikolov





В понеделник, 28 септември 2020 г., 20:46:16 Гринуич+3, Jayme 
<jay...@gmail.com> написа: 





It might be possible to do something similar as described in the documentation 
here: 
https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.4/html/administration_guide/creating_arbitrated_replicated_volumes#sect-Create_Multiple_Arbitrated_Volumes
 -- but I'm not sure if oVirt HCI would support it. You might have to roll out 
your own GlusterFS storage solution. Someone with more Gluster/HCI knowledge 
might know better.

On Mon, Sep 28, 2020 at 1:26 PM C Williams <cwilliams3...@gmail.com> wrote:
> Jayme,
> 
> Thank for getting back with me ! 
> 
> If I wanted to be wasteful with storage, could I start with an initial 
> replica 2 + arbiter and then add 2 bricks to the volume ? Could the arbiter 
> solve split-brains for 4 bricks ?
> 
> Thank You For Your Help !
> 
> On Mon, Sep 28, 2020 at 12:05 PM Jayme <jay...@gmail.com> wrote:
>> You can only do HCI in multiple's of 3. You could do a 3 server HCI setup 
>> and add the other two servers as compute nodes or you could add a 6th server 
>> and expand HCI across all 6
>> 
>> On Mon, Sep 28, 2020 at 12:28 PM C Williams <cwilliams3...@gmail.com> wrote:
>>> Hello,
>>> 
>>> We recently received 5 servers. All have about 3 TB of storage. 
>>> 
>>> I want to deploy an oVirt HCI using as much of my storage and compute 
>>> resources as possible. 
>>> 
>>> Would oVirt support a "replica 5" HCI (Compute/Gluster) cluster ?
>>> 
>>> I have deployed replica 3s and know about replica 2 + arbiter -- but an 
>>> arbiter would not be applicable here -- since I have equal storage on all 
>>> of the planned bricks.
>>> 
>>> Thank You For Your Help !!
>>> 
>>> C Williams
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>> 
> 
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