You can use   a distributed replicated volume of type 'replica 3 arbiter 1'.
For example, NodeA  and NodeB are contain  replica  set 1  with NodeC as their 
arbiter and NodeD and NodeE as the second  replica set  2  with NodeC as thir 
arbiter also.

In such case you got only 2 copies of a single shard, but you are fully 
"supported" from gluster perspective.
Also, all  hosts can have an external storage like  your  NAS.

Best Regards,
Strahil Nikolov

На 15 юли 2020 г. 21:11:34 GMT+03:00, Philip  Brown <pbr...@medata.com> написа:
>arg. when I said "add 2 more nodes that arent part of the cluster", I
>meant,
>"part of the glusterfs cluster".
>
>or at minimum, maybe some kind of client-only setup, if they need
>access?
>
>
>----- Original Message -----
>From: "Philip Brown" <pbr...@medata.com>
>To: "users" <users@ovirt.org>
>Sent: Wednesday, July 15, 2020 10:37:48 AM
>Subject: [ovirt-users] mixed hyperconverged?
>
>I'm thinking of doing an SSD based hyperconverged setup (for 4.3), but
>am wondering about certain design issues.
>
>seems like the optimal number is 3 nodes for the glusterfs.
>but.. I want 5 host nodes, not 3
>and I want the main storage for VMs to be separate iSCSI NAS boxes.
>Is it possible to have 3 nodes be the hyperconverged stuff.. but then
>add in 2 "regular" nodes, that dont store anything and arent part of
>the cluster?
>
>is it required to be part of the gluster cluster, to also be part of
>the ovirt cluster, if thats where the hosted-engine lives?
>or can I just have the hosted engine be switchable between the 3 nodes,
>and the other 2 be VM-only hosts?
>
>Any recommendations here?
>
>I dont what 5 way replication going on. Nor do I want to have to pay
>for large SSDs on all my host nodes.
>(Im planning to run them with the ovirt 3.4 node image)
>
>
>
>--
>Philip Brown| Sr. Linux System Administrator | Medata, Inc. 
>5 Peters Canyon Rd Suite 250 
>Irvine CA 92606 
>Office 714.918.1310| Fax 714.918.1325 
>pbr...@medata.com| www.medata.com
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